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@@ -1,5 +1,3 @@ | ||
#![feature(c_unwind)] | ||
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#[no_mangle] | ||
extern "C-unwind" fn unwind() { | ||
panic!(); | ||
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#![feature(core_intrinsics, custom_mir)] | ||
use std::intrinsics::mir::*; | ||
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#[custom_mir(dialect = "runtime")] | ||
fn main() { | ||
mir! { | ||
let val: i32; | ||
{ | ||
val = 42; //~ERROR: accessing a dead local variable | ||
StorageLive(val); // too late... (but needs to be here to make `val` not implicitly live) | ||
Return() | ||
} | ||
} | ||
} |
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error: Undefined Behavior: accessing a dead local variable | ||
--> $DIR/storage-live-dead-var.rs:LL:CC | ||
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LL | val = 42; | ||
| ^^^^^^^^ accessing a dead local variable | ||
| | ||
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior | ||
= help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information | ||
= note: BACKTRACE: | ||
= note: inside `main` at $DIR/storage-live-dead-var.rs:LL:CC | ||
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note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace | ||
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error: aborting due to 1 previous error | ||
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#![feature(core_intrinsics, custom_mir)] | ||
use std::intrinsics::mir::*; | ||
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#[custom_mir(dialect = "runtime")] | ||
fn main() { | ||
mir! { | ||
let val: i32; | ||
let _val2: i32; | ||
{ | ||
StorageLive(val); | ||
val = 42; | ||
StorageLive(val); // reset val to `uninit` | ||
_val2 = val; //~ERROR: uninitialized | ||
Return() | ||
} | ||
} | ||
} |
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error: Undefined Behavior: constructing invalid value: encountered uninitialized memory, but expected an integer | ||
--> $DIR/storage-live-resets-var.rs:LL:CC | ||
| | ||
LL | _val2 = val; | ||
| ^^^^^^^^^^^ constructing invalid value: encountered uninitialized memory, but expected an integer | ||
| | ||
= help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior | ||
= help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information | ||
= note: BACKTRACE: | ||
= note: inside `main` at $DIR/storage-live-resets-var.rs:LL:CC | ||
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note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace | ||
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error: aborting due to 1 previous error | ||
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