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errorshow.jl
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errorshow.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
using Random, LinearAlgebra
# For curmod_*
include("testenv.jl")
# re-register only the error hints that are being tested here (
Base.Experimental.register_error_hint(Base.noncallable_number_hint_handler, MethodError)
Base.Experimental.register_error_hint(Base.string_concatenation_hint_handler, MethodError)
Base.Experimental.register_error_hint(Base.methods_on_iterable, MethodError)
Base.Experimental.register_error_hint(Base.nonsetable_type_hint_handler, MethodError)
Base.Experimental.register_error_hint(Base.fielderror_hint_handler, FieldError)
@testset "SystemError" begin
err = try; systemerror("reason", Cint(0)); false; catch ex; ex; end::SystemError
errs = sprint(Base.showerror, err)
@test startswith(errs, "SystemError: reason: ")
err = try; systemerror("reason", Cint(0), extrainfo="addend"); false; catch ex; ex; end::SystemError
errs = sprint(Base.showerror, err)
@test startswith(errs, "SystemError (with addend): reason: ")
err = try
Libc.errno(0xc0ffee)
systemerror("reason", true)
false
catch ex
ex
end::SystemError
errs = sprint(Base.showerror, err)
@test startswith(errs, "SystemError: reason: ")
err = try; Base.windowserror("reason", UInt32(0)); false; catch ex; ex; end::SystemError
errs = sprint(Base.showerror, err)
@test startswith(errs, Sys.iswindows() ? "SystemError: reason: " :
"SystemError (with Base.WindowsErrorInfo(0x00000000, nothing)): reason: ")
err = try; Base.windowserror("reason", UInt32(0); extrainfo="addend"); false; catch ex; ex; end::SystemError
errs = sprint(Base.showerror, err)
@test startswith(errs, Sys.iswindows() ? "SystemError (with addend): reason: " :
"SystemError (with Base.WindowsErrorInfo(0x00000000, \"addend\")): reason: ")
@static if Sys.iswindows()
err = try
ccall(:SetLastError, stdcall, Cvoid, (UInt32,), 0x00000000)
Base.windowserror("reason", true)
false
catch ex
ex
end::SystemError
errs = sprint(Base.showerror, err)
@test startswith(errs, "SystemError: reason: ")
end
end
file = @__FILE__
sep = Base.Filesystem.path_separator
modul = @__MODULE__
Base.stacktrace_contract_userdir() && (file = Base.contractuser(file))
fname = basename(file)
dname = dirname(file)
cmod = "\n @ $modul"
cfile = " $file:"
c1line = @__LINE__() + 1
method_c1(x::Float64, s::AbstractString...) = true
buf = IOBuffer()
Base.show_method_candidates(buf, Base.MethodError(method_c1,(1, 1, "")))
@test occursin("\n\nClosest candidates are:\n method_c1(!Matched::Float64, !Matched::AbstractString...)$cmod$cfile$c1line\n", String(take!(buf)))
@test length(methods(method_c1)) <= 3 # because of '...' in candidate printing
Base.show_method_candidates(IOContext(buf, :color => true), Base.MethodError(method_c1,(1, 1, "")))
mod_col = Base.text_colors[Base.STACKTRACE_FIXEDCOLORS[modul]]
@test occursin("\n\n\e[0mClosest candidates are:\n\e[0m method_c1(\e[91m::Float64\e[39m, \e[91m::AbstractString...\e[39m)\n\e[0m\e[90m @\e[39m $mod_col$modul\e[39m \e[90m$dname$sep\e[39m\e[90m\e[4m$fname:$c1line\e[24m\e[39m\n", String(take!(buf)))
Base.show_method_candidates(buf, Base.MethodError(method_c1,(1, "", "")))
@test occursin("\n\nClosest candidates are:\n method_c1(!Matched::Float64, ::AbstractString...)$cmod$cfile$c1line\n", String(take!(buf)))
# should match
Base.show_method_candidates(buf, Base.MethodError(method_c1,(1., "", "")))
@test occursin("\n\nClosest candidates are:\n method_c1(::Float64, ::AbstractString...)$cmod$cfile$c1line\n", String(take!(buf)))
# Have no matches, but still print up to 3
Base.show_method_candidates(buf, Base.MethodError(method_c1,(1, 1, 1)))
@test occursin("\n\nClosest candidates are:\n method_c1(!Matched::Float64, !Matched::AbstractString...)$cmod$cfile$c1line\n", String(take!(buf)))
function nomethodsfunc end
Base.show_method_candidates(buf, Base.MethodError(nomethodsfunc,(1, 1, 1)))
@test isempty(String(take!(buf)))
# matches the implicit constructor -> convert method
Base.show_method_candidates(buf, Base.MethodError(Tuple{}, (1, 1, 1)))
let mc = String(take!(buf))
@test occursin("\nClosest candidates are:\n (::Type{T})", mc)
@test !occursin(cfile, mc)
end
c2line = @__LINE__
method_c2(x::Int32, args...) = true
method_c2(x::Int32, y::Float64, args...) = true
method_c2(x::Int32, y::Float64) = true
method_c2(x::Int32, y::Int32, z::Int32) = true
method_c2(x::T, y::T, z::T) where {T<:Real} = true
let s
Base.show_method_candidates(buf, Base.MethodError(method_c2, (1., 1., 2)))
s = String(take!(buf))
@test occursin("\n\nClosest candidates are:\n ", s)
@test occursin("\n method_c2(!Matched::Int32, ::Float64, ::Any...)$cmod$cfile$(c2line+2)\n ", s)
@test occursin("\n method_c2(::T, ::T, !Matched::T) where T<:Real$cmod$cfile$(c2line+5)\n ", s)
@test occursin("\n method_c2(!Matched::Int32, ::Any...)$cmod$cfile$(c2line+1)\n ", s)
@test occursin("\n ...\n", s)
end
c3line = @__LINE__() + 1
method_c3(x::Float64, y::Float64) = true
Base.show_method_candidates(buf, Base.MethodError(method_c3,(1.,)))
@test occursin( "\n\nClosest candidates are:\n method_c3(::Float64, !Matched::Float64)$cmod$cfile$c3line\n", String(take!(buf)))
# Test for the method error in issue #8651
c4line = @__LINE__
method_c4() = true
method_c4(x::AbstractString) = false
Base.show_method_candidates(buf, MethodError(method_c4,("",)))
@test occursin("\n\nClosest candidates are:\n method_c4(::AbstractString)$cmod$cfile$(c4line+2)\n method_c4()$cmod$cfile$(c4line+1)\n", String(take!(buf)))
c5line = @__LINE__() + 1
method_c5(::Type{Float64}) = true
Base.show_method_candidates(buf, MethodError(method_c5,(Float64,)))
@test occursin("\nClosest candidates are:\n method_c5(::Type{Float64})$cmod$cfile$c5line", String(take!(buf)))
Base.show_method_candidates(buf, MethodError(method_c5,(Int32,)))
@test occursin("\nClosest candidates are:\n method_c5(!Matched::Type{Float64})$cmod$cfile$c5line", String(take!(buf)))
mutable struct Test_type end
test_type = Test_type()
for f in [getindex, setindex!]
Base.show_method_candidates(buf, MethodError(f,(test_type, 1,1)))
@test String(take!(buf)) == ""
end
PR16155line = @__LINE__() + 2
mutable struct PR16155
a::Int64
b
end
PR16155line2 = @__LINE__() + 1
(::Type{T})(arg::Any) where {T<:PR16155} = "replace call-to-convert method from sysimg"
Base.show_method_candidates(buf, MethodError(PR16155,(1.0, 2.0, Int64(3))))
@test occursin("\nClosest candidates are:\n $(curmod_prefix)PR16155(::Any, ::Any)$cmod$cfile$PR16155line\n $(curmod_prefix)PR16155(!Matched::Int64, ::Any)$cmod$cfile$PR16155line\n (::Type{T})(::Any) where T<:$(curmod_prefix)PR16155$cmod$cfile$PR16155line2", String(take!(buf)))
Base.show_method_candidates(buf, MethodError(PR16155,(Int64(3), 2.0, Int64(3))))
@test occursin("\nClosest candidates are:\n $(curmod_prefix)PR16155(::Int64, ::Any)$cmod$cfile$PR16155line\n $(curmod_prefix)PR16155(::Any, ::Any)$cmod$cfile$PR16155line\n (::Type{T})(::Any) where T<:$(curmod_prefix)PR16155$cmod$cfile$PR16155line2", String(take!(buf)))
Base.show_method_candidates(buf, MethodError(Complex{T} where T<:Integer, (1.2,)))
@test startswith(String(take!(buf)), "\n\nClosest candidates are:\n (::Type{T})(::T) where T<:Number")
c6line = @__LINE__
method_c6(; x=1) = x
method_c6(a; y=1) = y
m_error = try method_c6(y=1) catch e; e; end
showerror(buf, m_error)
error_out = String(take!(buf))
m_error = try method_c6(1, x=1) catch e; e; end
showerror(buf, m_error)
error_out1 = String(take!(buf))
c6mline = @__LINE__
module TestKWError
method_c6_in_module(; x=1) = x
method_c6_in_module(a; y=1) = y
end
m_error = try TestKWError.method_c6_in_module(y=1) catch e; e; end
showerror(buf, m_error)
error_out2 = String(take!(buf))
m_error = try TestKWError.method_c6_in_module(1, x=1) catch e; e; end
showerror(buf, m_error)
error_out3 = String(take!(buf))
@test occursin("method_c6(; x) got unsupported keyword argument \"y\"$cmod$cfile$(c6line + 1)", error_out)
@test occursin("method_c6(!Matched::Any; y)$cmod$cfile$(c6line + 2)", error_out)
@test occursin("method_c6(::Any; y) got unsupported keyword argument \"x\"$cmod$cfile$(c6line + 2)", error_out1)
@test occursin("method_c6_in_module(; x) got unsupported keyword argument \"y\"$cmod$cfile$(c6mline + 2)", error_out2)
@test occursin("method_c6_in_module(!Matched::Any; y)$cmod$cfile$(c6mline + 3)", error_out2)
@test occursin("method_c6_in_module(::Any; y) got unsupported keyword argument \"x\"$cmod$cfile$(c6mline + 3)", error_out3)
c7line = @__LINE__() + 1
method_c7(a, b; kargs...) = a
Base.show_method_candidates(buf, MethodError(method_c7, (1, 1)), pairs((x = 1, y = 2)))
@test occursin("\nClosest candidates are:\n method_c7(::Any, ::Any; kargs...)$cmod$cfile$c7line", String(take!(buf)))
c8line = @__LINE__() + 1
method_c8(a, b; y=1, w=1) = a
Base.show_method_candidates(buf, MethodError(method_c8, (1, 1)), pairs((x = 1, y = 2, z = 1, w = 1)))
@test occursin("\nClosest candidates are:\n method_c8(::Any, ::Any; y, w) got unsupported keyword arguments \"x\", \"z\"$cmod$cfile$c8line", String(take!(buf)))
let no_kwsorter_match, e
no_kwsorter_match() = 0
no_kwsorter_match(a;y=1) = y
e = try no_kwsorter_match(y=1) catch ex; ex; end
@test occursin(Regex("no method matching.+\\(; y::$(Int)\\)"), sprint(showerror, e))
end
ac15639line = @__LINE__
addConstraint_15639(c::Int32) = c
addConstraint_15639(c::Int64; uncset=nothing) = addConstraint_15639(Int32(c), uncset=uncset)
Base.show_method_candidates(buf, MethodError(addConstraint_15639, (Int32(1),)), pairs((uncset = nothing,)))
@test occursin("\nClosest candidates are:\n addConstraint_15639(::Int32) got unsupported keyword argument \"uncset\"$cmod$cfile$(ac15639line + 1)\n addConstraint_15639(!Matched::Int64; uncset)$cmod$cfile$(ac15639line + 2)", String(take!(buf)))
# Busted Vararg method definitions
bad_vararg_decl(x::Int, y::Vararg) = 1 # don't do this, instead use (x::Int, y...)
Base.show_method_candidates(buf, try bad_vararg_decl("hello", 3) catch e e end)
@test occursin("bad_vararg_decl(!Matched::$Int, ::Any...)", String(take!(buf)))
macro except_str(expr, err_type)
return quote
let err = nothing
try
$(esc(expr))
catch err
end
err === nothing && error("expected failure, but no exception thrown")
@test typeof(err) === $(esc(err_type))
buf = IOBuffer()
showerror(buf, err)
String(take!(buf))
end
end
end
macro except_strbt(expr, err_type)
errmsg = "expected failure, but no exception thrown for $expr"
return quote
let err = nothing
try
$(esc(expr))
catch err
end
err === nothing && error($errmsg)
@test typeof(err) === $(esc(err_type))
buf = IOBuffer()
showerror(buf, err, catch_backtrace())
String(take!(buf))
end
end
end
macro except_stackframe(expr, err_type)
return quote
let err = nothing
local st
try
$(esc(expr))
catch err
st = stacktrace(catch_backtrace())
end
err === nothing && error("expected failure, but no exception thrown")
@test typeof(err) === $(esc(err_type))
sprint(show, st[1])
end
end
end
# Pull Request 11007
abstract type InvokeType11007 end
abstract type MethodType11007 <: InvokeType11007 end
mutable struct InstanceType11007 <: MethodType11007
end
let
f11007(::MethodType11007) = nothing
err_str = @except_str(invoke(f11007, Tuple{InvokeType11007},
InstanceType11007()), MethodError)
@test !occursin("::$(curmod_prefix)InstanceType11007", err_str)
@test occursin("::$(curmod_prefix)InvokeType11007", err_str)
end
module __tmp_replutil
using Test
import ..@except_str
global +
+() = nothing
err_str = @except_str 1 + 2 MethodError
@test occursin("import Base.:+", err_str)
err_str = @except_str Float64[](1) MethodError
@test !occursin("import Base.Array", err_str)
Array() = 1
err_str = @except_str Array([1]) MethodError
@test occursin("import Base.Array", err_str)
end
let
g11007(::AbstractVector) = nothing
err_str = @except_str g11007([[1] [1]]) MethodError
@test occursin("row vector", err_str)
@test occursin("column vector", err_str)
end
struct TypeWithIntParam{T<:Integer, Vector{T}<:A<:AbstractArray{T}} end
struct Bounded # not an AbstractArray
bound::Int
end
Base.getindex(b::Bounded, i) = checkindex(Bool, 1:b.bound, i) || throw(BoundsError(b, i))
Base.summary(io::IO, b::Bounded) = print(io, "$(b.bound)-size Bounded")
let undefvar
err_str = @except_strbt sqrt(-1) DomainError
@test occursin("Try sqrt(Complex(x)).", err_str)
err_str = @except_strbt 2^(1-2) DomainError
@test occursin("Cannot raise an integer x to a negative power -1", err_str)
err_str = @except_strbt (-1)^0.25 DomainError
@test occursin("Exponentiation yielding a complex result requires a complex argument", err_str)
A = zeros(10, 10)
A[2,1] = 1
A[1,2] = -1
err_str = @except_strbt eigmax(A) DomainError
@test occursin("DomainError with [0.0 -1.0 …", err_str)
err_str = @except_str (1, 2, 3)[4] BoundsError
@test err_str == "BoundsError: attempt to access Tuple{$Int, $Int, $Int} at index [4]"
err_str = @except_str [5, 4, 3][-2, 1] BoundsError
@test err_str == "BoundsError: attempt to access 3-element Vector{$Int} at index [-2, 1]"
err_str = @except_str [5, 4, 3][1:5] BoundsError
@test err_str == "BoundsError: attempt to access 3-element Vector{$Int} at index [1:5]"
err_str = @except_str [5, 4, 3][trues(6,7)] BoundsError
@test err_str == "BoundsError: attempt to access 3-element Vector{$Int} at index [6×7 BitMatrix]"
err_str = @except_str Bounded(2)[3] BoundsError
@test err_str == "BoundsError: attempt to access 2-size Bounded at index [3]"
err_str = @except_str 0::Bool TypeError
@test err_str == "TypeError: non-boolean ($Int) used in boolean context"
err_str = @except_str 0::AbstractFloat TypeError
@test err_str == "TypeError: in typeassert, expected AbstractFloat, got a value of type $Int"
err_str = @except_str 0::7 TypeError
@test err_str == "TypeError: in typeassert, expected Type, got a value of type $Int"
err_str = @except_str "" <: AbstractString TypeError
@test err_str == "TypeError: in <:, expected Type, got a value of type String"
err_str = @except_str AbstractString <: "" TypeError
@test err_str == "TypeError: in <:, expected Type, got a value of type String"
err_str = @except_str Type{""} TypeError
@test err_str == "TypeError: in Type, in parameter, expected Type, got a value of type String"
err_str = @except_str TypeWithIntParam{Any} TypeError
@test err_str == "TypeError: in TypeWithIntParam, in T, expected T<:Integer, got Type{Any}"
err_str = @except_str TypeWithIntParam{Int64,Vector{Float64}} TypeError
@test err_str == "TypeError: in TypeWithIntParam, in A, expected Vector{Int64}<:A<:(AbstractArray{Int64}), got Type{Vector{Float64}}"
err_str = @except_str TypeWithIntParam{Int64}{Vector{Float64}} TypeError
@test err_str == "TypeError: in TypeWithIntParam, in A, expected Vector{Int64}<:A<:(AbstractArray{Int64}), got Type{Vector{Float64}}"
err_str = @except_str Type{Vararg} TypeError
@test err_str == "TypeError: in Type, in parameter, expected Type, got Vararg"
err_str = @except_str Ref{Vararg} TypeError
@test err_str == "TypeError: in Type, in parameter, expected Type, got Vararg"
err_str = @except_str mod(1,0) DivideError
@test err_str == "DivideError: integer division error"
err_str = @except_str Vector{Any}(undef, 1)[1] UndefRefError
@test err_str == "UndefRefError: access to undefined reference"
err_str = @except_str undefvar UndefVarError
@test err_str == "UndefVarError: `undefvar` not defined in local scope"
err_str = @except_str read(IOBuffer(), UInt8) EOFError
@test err_str == "EOFError: read end of file"
err_str = @except_str Dict()[:doesnotexist] KeyError
@test err_str == "KeyError: key :doesnotexist not found"
err_str = @except_str throw(InterruptException()) InterruptException
@test err_str == "InterruptException:"
err_str = @except_str throw(ArgumentError("not an error")) ArgumentError
@test err_str == "ArgumentError: not an error"
err_str = @except_str @assert(false) AssertionError
@test err_str == "AssertionError: false"
end
# issue 11845
let buf = IOBuffer()
showerror(buf, MethodError(convert, (3, 1.0)))
showerror(buf, MethodError(convert, (Int, 1.0)))
showerror(buf, MethodError(convert, Tuple{Type, Float64}))
showerror(buf, MethodError(convert, Tuple{DataType, Float64}))
end
# Issue #14884
primitive type EightBitType 8 end
primitive type EightBitTypeT{T} 8 end
struct FunctionLike <: Function; end
let err_str,
i = reinterpret(EightBitType, 0x54),
j = reinterpret(EightBitTypeT{Int32}, 0x54)
err_str = @except_str Bool() MethodError
@test occursin("MethodError: no method matching Bool()", err_str)
err_str = @except_str :a() MethodError
@test occursin("MethodError: objects of type Symbol are not callable", err_str)
err_str = @except_str EightBitType() MethodError
@test occursin("MethodError: no method matching $(curmod_prefix)EightBitType()", err_str)
err_str = @except_str i() MethodError
@test occursin("MethodError: objects of type $(curmod_prefix)EightBitType are not callable", err_str)
err_str = @except_str EightBitTypeT() MethodError
@test occursin("MethodError: no method matching $(curmod_prefix)EightBitTypeT()", err_str)
err_str = @except_str EightBitTypeT{Int32}() MethodError
@test occursin("MethodError: no method matching $(curmod_prefix)EightBitTypeT{Int32}()", err_str)
err_str = @except_str j() MethodError
@test occursin("MethodError: objects of type $(curmod_prefix)EightBitTypeT{Int32} are not callable", err_str)
err_str = @except_str FunctionLike()() MethodError
@test occursin("MethodError: no method matching (::$(curmod_prefix)FunctionLike)()", err_str)
err_str = @except_str [1,2](1) MethodError
@test occursin("MethodError: objects of type Vector{$Int} are not callable\nUse square brackets [] for indexing an Array.", err_str)
# Issue 14940
err_str = @except_str randn(1)() MethodError
@test occursin("MethodError: objects of type Vector{Float64} are not callable", err_str)
end
@test repr("text/plain", FunctionLike()) == "(::$(curmod_prefix)FunctionLike) (generic function with 0 methods)"
@test occursin(r"^@doc \(macro with \d+ method[s]?\)$", repr("text/plain", getfield(Base, Symbol("@doc"))))
# Issue 34636
let err_str
err_str = @except_str 1 + rand(5) MethodError
@test occursin("MethodError: no method matching +(::$Int, ::Vector{Float64})", err_str)
@test occursin("For element-wise addition, use broadcasting with dot syntax: scalar .+ array", err_str)
err_str = @except_str rand(5) - 1//3 MethodError
@test occursin("MethodError: no method matching -(::Vector{Float64}, ::Rational{$Int})", err_str)
@test occursin("For element-wise subtraction, use broadcasting with dot syntax: array .- scalar", err_str)
end
method_defs_lineno = @__LINE__() + 1
String() = throw(ErrorException("1"))
(::String)() = throw(ErrorException("2"))
EightBitType() = throw(ErrorException("3"))
(::EightBitType)() = throw(ErrorException("4"))
EightBitTypeT() = throw(ErrorException("5"))
EightBitTypeT{T}() where {T} = throw(ErrorException("6"))
(::EightBitTypeT)() = throw(ErrorException("7"))
(::FunctionLike)() = throw(ErrorException("8"))
struct StructWithUnionAllMethodDefs{T}
end
(::Type{StructWithUnionAllMethodDefs{T} where T<:Integer})(x) = x
let err_str,
i = reinterpret(EightBitType, 0x54),
j = reinterpret(EightBitTypeT{Int32}, 0x54),
sp = Base.source_path()
sn = basename(sp)
Base.stacktrace_contract_userdir() && (sp = Base.contractuser(sp))
@test sprint(show, which(String, Tuple{})) ==
"String() @ $curmod_str $sp:$(method_defs_lineno + 0)"
@test sprint(show, which("a", Tuple{})) ==
"(::String)() @ $curmod_str $sp:$(method_defs_lineno + 1)"
@test sprint(show, which(EightBitType, Tuple{})) ==
"$(curmod_prefix)EightBitType() @ $curmod_str $sp:$(method_defs_lineno + 2)"
@test sprint(show, which(reinterpret(EightBitType, 0x54), Tuple{})) ==
"(::$(curmod_prefix)EightBitType)() @ $curmod_str $sp:$(method_defs_lineno + 3)"
@test sprint(show, which(EightBitTypeT, Tuple{})) ==
"$(curmod_prefix)EightBitTypeT() @ $curmod_str $sp:$(method_defs_lineno + 4)"
@test sprint(show, which(EightBitTypeT{Int32}, Tuple{})) ==
"$(curmod_prefix)EightBitTypeT{T}() where T @ $curmod_str $sp:$(method_defs_lineno + 5)"
@test sprint(show, which(reinterpret(EightBitTypeT{Int32}, 0x54), Tuple{})) ==
"(::$(curmod_prefix)EightBitTypeT)() @ $curmod_str $sp:$(method_defs_lineno + 6)"
@test startswith(sprint(show, which(Complex{Int}, Tuple{Int})),
"Complex{T}(")
@test startswith(sprint(show, which(getfield(Base, Symbol("@doc")), Tuple{LineNumberNode, Module, Vararg{Any}})),
"var\"@doc\"(__source__::LineNumberNode, __module__::Module, x...) @ Core boot.jl:")
@test startswith(sprint(show, which(FunctionLike(), Tuple{})),
"(::$(curmod_prefix)FunctionLike)() @ $curmod_str $sp:$(method_defs_lineno + 7)")
@test startswith(sprint(show, which(StructWithUnionAllMethodDefs{<:Integer}, (Any,))),
"($(curmod_prefix)StructWithUnionAllMethodDefs{T} where T<:Integer)(x)")
@test repr("text/plain", FunctionLike()) == "(::$(curmod_prefix)FunctionLike) (generic function with 1 method)"
@test repr("text/plain", Core.getfield) == "getfield (built-in function)"
err_str = @except_stackframe String() ErrorException
@test err_str == "String() at $sn:$(method_defs_lineno + 0)"
err_str = @except_stackframe "a"() ErrorException
@test err_str == "(::String)() at $sn:$(method_defs_lineno + 1)"
err_str = @except_stackframe EightBitType() ErrorException
@test err_str == "$(curmod_prefix)EightBitType() at $sn:$(method_defs_lineno + 2)"
err_str = @except_stackframe i() ErrorException
@test err_str == "(::$(curmod_prefix)EightBitType)() at $sn:$(method_defs_lineno + 3)"
err_str = @except_stackframe EightBitTypeT() ErrorException
@test err_str == "$(curmod_prefix)EightBitTypeT() at $sn:$(method_defs_lineno + 4)"
err_str = @except_stackframe EightBitTypeT{Int32}() ErrorException
@test err_str == "$(curmod_prefix)EightBitTypeT{Int32}() at $sn:$(method_defs_lineno + 5)"
err_str = @except_stackframe j() ErrorException
@test err_str == "(::$(curmod_prefix)EightBitTypeT{Int32})() at $sn:$(method_defs_lineno + 6)"
err_str = @except_stackframe FunctionLike()() ErrorException
@test err_str == "(::$(curmod_prefix)FunctionLike)() at $sn:$(method_defs_lineno + 7)"
end
# Issue #20108
let err, buf = IOBuffer()
try Array() catch err end
Base.show_method_candidates(buf,err)
@test isa(err, MethodError)
@test occursin("Closest candidates are:", String(take!(buf)))
end
# @macroexpand tests
macro seven_dollar(ex)
# simonbyrne example 18240
isa(ex,Expr) && ex.head == :$ ? 7 : esc(ex)
end
let
@test (@macroexpand @macroexpand x) == macroexpand(@__MODULE__, :(@macroexpand x))
@test (@macroexpand :(1+$y) ) == macroexpand(@__MODULE__, :( :(1+ $y) ))
@test (@macroexpand @fastmath 1+2 ) == :(Base.FastMath.add_fast(1,2))
@test (@macroexpand @fastmath + ) == :(Base.FastMath.add_fast)
@test (@macroexpand @fastmath min(1) ) == :(Base.FastMath.min_fast(1))
let err = try; @macroexpand @doc "" f() = @x; catch ex; ex; end
@test err == UndefVarError(Symbol("@x"), @__MODULE__)
end
@test (@macroexpand @seven_dollar $bar) == 7
x = 2
@test (@macroexpand @seven_dollar 1+$x) == :(1 + $(Expr(:$, :x)))
end
macro nest1(code)
code
end
macro nest2(code)
:(@nest1 $code)
end
macro nest2b(code)
:(@nest1($code); @nest1($code))
end
@testset "@macroexpand1" begin
M = @__MODULE__
_macroexpand1(ex) = macroexpand(M, ex, recursive=false)
ex = :(@nest1 42)
@test _macroexpand1(ex) == macroexpand(M,ex)
ex = :(@nest2 42)
@test _macroexpand1(ex) != macroexpand(M,ex)
@test _macroexpand1(_macroexpand1(ex)) == macroexpand(M,ex)
ex = :(@nest2b 42)
@test _macroexpand1(ex) != macroexpand(M,ex)
@test _macroexpand1(_macroexpand1(ex)) == macroexpand(M, ex)
@test (@macroexpand1 @nest2b 42) == _macroexpand1(:(@nest2b 42))
end
module TwoargMacroExpand
macro modulecontext(); return __module__; end
end
@test (@__MODULE__) == @macroexpand TwoargMacroExpand.@modulecontext
@test TwoargMacroExpand == @macroexpand TwoargMacroExpand @modulecontext
@test (@__MODULE__) == @macroexpand1 TwoargMacroExpand.@modulecontext
@test TwoargMacroExpand == @macroexpand1 TwoargMacroExpand @modulecontext
foo_9965(x::Float64; w=false) = x
foo_9965(x::Int) = 2x
@testset "closest candidates kwarg #9965" begin
ex = try
foo_9965(1, w=true)
catch e
e
end
@test typeof(ex) == MethodError
io = IOBuffer()
Base.show_method_candidates(io, ex, pairs((w = true,)))
@test occursin("got unsupported keyword argument \"w\"", String(take!(io)))
end
@testset "MethodError with long types (#50803)" begin
a = view(reinterpret(reshape, UInt8, PermutedDimsArray(rand(5, 7), (2, 1))), 2:3, 2:4, 1:4) # a mildly-complex type
function f50803 end
ex50803 = try
f50803(a, a, a, a, a, a)
catch e
e
end::MethodError
tlf = Ref(false)
str = sprint(Base.showerror, ex50803; context=(:displaysize=>(1000, 120), :stacktrace_types_limited=>tlf))
@test tlf[]
@test occursin("::SubArray{…}", str)
tlf[] = false
str = sprint(Base.showerror, ex50803; context=(:displaysize=>(1000, 10000), :stacktrace_types_limited=>tlf))
@test !tlf[]
str = sprint(Base.showerror, ex50803; context=(:displaysize=>(1000, 120)))
@test !occursin("::SubArray{…}", str)
end
# Issue #20556
import REPL
module EnclosingModule
abstract type AbstractTypeNoConstructors end
end
let
method_error = MethodError(EnclosingModule.AbstractTypeNoConstructors, (), Base.get_world_counter())
# Test that it shows a special message when no constructors have been defined by the user.
@test startswith(sprint(showerror, method_error),
"""MethodError: no constructors have been defined for $(EnclosingModule.AbstractTypeNoConstructors)
The type `$(EnclosingModule.AbstractTypeNoConstructors)` exists, but no method is defined for this combination of argument types when trying to construct it.""")
# Does it go back to previous behaviour when there *is* at least
# one constructor defined?
EnclosingModule.AbstractTypeNoConstructors(x, y) = x + y
@test startswith(sprint(showerror, method_error),
"MethodError: no method matching $(EnclosingModule.AbstractTypeNoConstructors)()")
# Test that the 'default' sysimg.jl method is not displayed.
@test !occursin("where T at sysimg.jl", sprint(showerror, method_error))
# Test that tab-completion will not show the 'default' sysimg.jl method.
completions = REPL.REPLCompletions.complete_methods(:(EnclosingModule.AbstractTypeNoConstructors()), @__MODULE__)
@test !isempty(completions)
for method_string in completions
@test !startswith(REPL.REPLCompletions.completion_text(method_string), "(::Type{T})(arg) where T in Base at sysimg.jl")
end
end
@testset "show for MethodError with world age issue" begin
global f21006
f21006() = nothing
# Normal method error should not warn about world age.
ex1 = try
f21006(())
catch e
e
end::MethodError
str = sprint(Base.showerror, ex1)
@test startswith(str, "MethodError: no method matching f21006(::Tuple{})")
@test !occursin("The applicable method may be too new", str)
# If newer applicable methods are available, world age should be mentioned.
f21006(x) = x
@test f21006(()) === ()
str = sprint(Base.showerror, ex1)
@test startswith(str, "MethodError: no method matching f21006(::Tuple{})")
@test occursin("The applicable method may be too new: running in world age $(ex1.world)", str)
# This method error should be thrown in a world new enough for `f21006(())`.
# Also makes sure it's printed correctly.
ex2 = try
f21006((), ())
catch e
e
end::MethodError
str = sprint(Base.showerror, ex2)
@test startswith(str, "MethodError: no method matching f21006(::Tuple{}, ::Tuple{})")
@test !occursin("The applicable method may be too new", str)
# If the method is available in the exception world or if the exception world is invalid,
# don't warn about world age
for ex3 in (MethodError(ex1.f, ex1.args, ex2.world),
MethodError(ex1.f, ex1.args, typemax(UInt)))
str = sprint(Base.showerror, ex3)
@test startswith(str, "MethodError: no method matching f21006(::Tuple{})")
@test !occursin("The applicable method may be too new", str)
end
str = sprint(Base.showerror, MethodError(+, (1.0, 2.0)))
@test startswith(str, "MethodError: no method matching +(::Float64, ::Float64)")
@test occursin("This error has been manually thrown, explicitly", str)
str = sprint(Base.showerror, MethodError(+, (1.0, 2.0), Base.get_world_counter()))
@test startswith(str, "MethodError: no method matching +(::Float64, ::Float64)")
@test occursin("This error has been manually thrown, explicitly", str)
str = sprint(Base.showerror, MethodError(Core.kwcall, ((; a=3.0), +, 1.0, 2.0)))
@test startswith(str, "MethodError: no method matching +(::Float64, ::Float64; a::Float64)")
@test occursin("This error has been manually thrown, explicitly", str)
str = sprint(Base.showerror, MethodError(Core.kwcall, ((; a=3.0), +, 1.0, 2.0), Base.get_world_counter()))
@test startswith(str, "MethodError: no method matching +(::Float64, ::Float64; a::Float64)")
@test occursin("This method does not support all of the given keyword arguments", str)
@test_throws "MethodError: no method matching kwcall()" Core.kwcall()
end
# Issue #50200
using Base.Experimental: @opaque
@testset "show for MethodError with world age issue (kwarg)" begin
test_no_error(f) = @test f() === nothing
function test_worldage_error(f)
ex = try; f(); error("Should not have been reached") catch ex; ex; end
strex = sprint(Base.showerror, ex)
@test occursin("The applicable method may be too new", strex)
@test !occursin("!Matched::", sprint(Base.showerror, strex))
end
global callback50200
# First the no-kwargs version
callback50200 = (args...)->nothing
f = @opaque ()->callback50200()
test_no_error(f)
callback50200 = (args...)->nothing
test_worldage_error(f)
callback50200 = (args...; kwargs...)->nothing
f = @opaque ()->callback50200(;a=1)
test_no_error(f)
callback50200 = (args...; kwargs...)->nothing
test_worldage_error(f)
end
# Custom hints
struct HasNoOne end
function recommend_oneunit(io, ex, arg_types, kwargs)
if ex.f === Base.one && length(arg_types) == 1 && arg_types[1] === HasNoOne
if isempty(kwargs)
print(io, "\nHasNoOne does not support `one`; did you mean `oneunit`?")
else
print(io, "\n`one` doesn't take keyword arguments, that would be silly")
end
end
end
@test Base.Experimental.register_error_hint(recommend_oneunit, MethodError) === nothing
let err_str
err_str = @except_str one(HasNoOne()) MethodError
@test occursin(r"MethodError: no method matching one\(::.*HasNoOne\)", err_str)
@test occursin("HasNoOne does not support `one`; did you mean `oneunit`?", err_str)
err_str = @except_str one(HasNoOne(); value=2) MethodError
@test occursin(Regex("MethodError: no method matching one\\(::.*HasNoOne; value::$(Int)\\)"), err_str)
@test occursin("`one` doesn't take keyword arguments, that would be silly", err_str)
end
pop!(Base.Experimental._hint_handlers[MethodError]) # order is undefined, don't copy this
function busted_hint(io, exc, notarg) # wrong number of args
print(io, "\nI don't have a hint for you, sorry")
end
@test Base.Experimental.register_error_hint(busted_hint, DomainError) === nothing
try
sqrt(-2)
catch ex
io = IOBuffer()
@test_logs (:error, "Hint-handler busted_hint for DomainError in $(@__MODULE__) caused an error") showerror(io, ex)
end
pop!(Base.Experimental._hint_handlers[DomainError]) # order is undefined, don't copy this
struct ANumber <: Number end
let err_str
err_str = @except_str ANumber()(3 + 4) MethodError
@test occursin("objects of type $(curmod_prefix)ANumber are not callable", err_str)
@test count(==("Maybe you forgot to use an operator such as *, ^, %, / etc. ?"), split(err_str, '\n')) == 1
# issue 40478
err_str = @except_str ANumber()(3 + 4) MethodError
@test count(==("Maybe you forgot to use an operator such as *, ^, %, / etc. ?"), split(err_str, '\n')) == 1
end
let err_str
a = [1 2; 3 4];
err_str = @except_str (a[1][2] = 5) MethodError
@test occursin("\nAre you trying to index into an array? For multi-dimensional arrays, separate the indices with commas: ", err_str)
@test occursin("a[1, 2]", err_str)
@test occursin("rather than a[1][2]", err_str)
end
let err_str
d = Dict
err_str = @except_str (d[1] = 5) MethodError
@test occursin("\nYou attempted to index the type Dict, rather than an instance of the type. Make sure you create the type using its constructor: ", err_str)
@test occursin("d = Dict([...])", err_str)
@test occursin(" rather than d = Dict", err_str)
end
# Execute backtrace once before checking formatting, see #38858
backtrace()
# issue #28442
@testset "Long stacktrace printing" begin
f28442(c) = g28442(c + 1)
g28442(c) = c > 10000 ? (return backtrace()) : f28442(c+1)
bt = f28442(1)
io = IOBuffer()
Base.show_backtrace(io, bt)
output = split(String(take!(io)), '\n')
length(output) >= 8 || println(output) # for better errors when this fails
@test lstrip(output[3])[1:3] == "[1]"
@test occursin("g28442", output[3])
@test lstrip(output[5])[1:3] == "[2]"
@test occursin("f28442", output[5])
@test occursin("the above 2 lines are repeated 5000 more times", output[7])
@test lstrip(output[8])[1:7] == "[10003]"
end
@testset "Line number correction" begin
getbt() = backtrace()
bt = getbt()
Base.update_stackframes_callback[] = function(list)
modify((sf, n)) = sf.func === :getbt ? (StackTraces.StackFrame(sf.func, sf.file, sf.line+2, sf.linfo, sf.from_c, sf.inlined, sf.pointer), n) : (sf, n)
map!(modify, list, list)
end
io = IOBuffer()
Base.show_backtrace(io, bt)
outputc = split(String(take!(io)), '\n')
Base.update_stackframes_callback[] = identity
Base.show_backtrace(io, bt)
output0 = split(String(take!(io)), '\n')
function getline(output)
idx = findfirst(str->occursin("getbt", str), output)
return parse(Int, match(r":(\d*)$", output[idx+1]).captures[1])
end
@test getline(outputc) == getline(output0) + 2
end
# issue #30633
@test_throws ArgumentError("invalid index: \"foo\" of type String") [1]["foo"]
@test_throws ArgumentError("invalid index: nothing of type Nothing") [1][nothing]
# issue #53618
@testset "FieldErrorHint" begin
struct FieldFoo
a::Float32
b::Int
end
s = FieldFoo(1, 2)
test = @test_throws FieldError s.c
ex = test.value::FieldError
# Check error message first
errorMsg = sprint(Base.showerror, ex)
@test occursin("FieldError: type FieldFoo has no field c", errorMsg)
d = Dict(s => 1)
for fld in fieldnames(Dict)
ex = try
getfield(d, fld)
catch e
print(e)
end
@test !(ex isa Type) || ex <: FieldError
end
test = @test_throws FieldError d.c
ex = test.value::FieldError
errorMsg = sprint(Base.showerror, ex)
@test occursin("FieldError: type Dict has no field c", errorMsg)
# Check hint message
hintExpected = "Did you mean to access dict values using key: `:c` ? Consider using indexing syntax dict[:c]\n"
@test occursin(hintExpected, errorMsg)
end
# test showing MethodError with type argument
struct NoMethodsDefinedHere; end
let buf = IOBuffer()
Base.show_method_candidates(buf, Base.MethodError(sin, Tuple{NoMethodsDefinedHere}))
@test length(take!(buf)) !== 0
end
# pr #32814
let t1 = @async(error(1)),
t2 = @async(wait(t1))
local e
try
wait(t2)
catch e_
e = e_
end
buf = IOBuffer()
showerror(buf, e)
s = String(take!(buf))
@test length(findall("Stacktrace:", s)) == 2
@test occursin("[1] error(s::Int", s)
end
module TestMethodShadow
struct Foo; x; end
+(a::Foo, b::Foo) = Foo(a.x + b.x)
==(a::Foo, b::Foo) = Foo(a.x == b.x)
div(a::Foo, b::Foo) = Foo(div(a.x, b.x))
end
for (func,str) in ((TestMethodShadow.:+,":+"), (TestMethodShadow.:(==),":(==)"), (TestMethodShadow.:div,"div"))
ex = try
foo = TestMethodShadow.Foo(3)
func(foo,foo)
catch e
e
end::MethodError
@test occursin("You may have intended to import Base.$str", sprint(Base.showerror, ex))
end
# Test that implementation detail of include() is hidden from the user by default
let bt = try
@noinline include("testhelpers/include_error.jl")
catch
catch_backtrace()
end
bt_str = sprint(Base.show_backtrace, bt)
@test occursin(" include(", bt_str)
@test !occursin(" _include(", bt_str)
end
# Test backtrace printing
module B
module C
@noinline f(x; y=2.0) = error()
end
module D
import ..C: f
g() = f(2.0; y=3.0)
end
end
@testset "backtrace" begin
bt = try
B.D.g()
catch
catch_backtrace()
end
bt_str = sprint(Base.show_backtrace, bt)
m = @__MODULE__
@test contains(bt_str, "f(x::Float64; y::Float64)")
@test contains(bt_str, "@ $m.B.C")
@test contains(bt_str, "@ $m.B.D")
end
# 1d/2d error shouldn't appear in unsupported keywords arg #36325
let err = nothing
try
identity([1 1]; bad_kwards = :julia)
catch err
err_str = sprint(showerror, err)
@test !occursin("2d", err_str)
end
end
# issue #37587
# TODO: enable on more platforms
if (Sys.isapple() || Sys.islinux()) && Sys.ARCH === :x86_64
single_repeater() = single_repeater()
pair_repeater_a() = pair_repeater_b()
pair_repeater_b() = pair_repeater_a()
@testset "repeated stack frames" begin
let bt = try
single_repeater()
catch
catch_backtrace()
end
bt_str = sprint(Base.show_backtrace, bt)
@test occursin(r"repeats \d+ times", bt_str)
end
let bt = try
pair_repeater_a()
catch
catch_backtrace()
end
bt_str = sprint(Base.show_backtrace, bt)
@test occursin(r"the above 2 lines are repeated \d+ more times", bt_str)
end
end
end
@testset "ScheduledAfterSyncException" begin
t = :DummyTask
msg = sprint(showerror, Base.ScheduledAfterSyncException(Any[t]))
@test occursin(":DummyTask is registered after the end of a `@sync` block", msg)
msg = sprint(showerror, Base.ScheduledAfterSyncException(Any[t, t]))
@test occursin(
":DummyTask and one more Symbol are registered after the end of a `@sync` block",
msg,
)
msg = sprint(showerror, Base.ScheduledAfterSyncException(Any[t, t, t]))
@test occursin(
":DummyTask and 2 more objects are registered after the end of a `@sync` block",
msg,
)
end
@testset "error message hints relative modules #40959" begin
m = Module()
expr = :(module Foo
module Bar
end
using Bar
end)
try
Base.eval(m, expr)
catch err
err_str = sprint(showerror, err)
@test contains(err_str, "maybe you meant `import/using .Bar`")
end
m = Module()
expr = :(module Foo
Bar = 3
using Bar
end)
try
Base.eval(m, expr)
catch err
err_str = sprint(showerror, err)