LLVM assertion failure in core tests

[JeffBezanson]

I get this on master with LLVM assertions enabled:

Test  (Worker) | Time (s) | GC (s) | GC % | Alloc (MB) | RSS (MB)
core       (1) |        started at 2020-02-20T14:14:10.279
julia: /home/jeff/src/julia/deps/srccache/llvm-9.0.1/lib/IR/Constants.cpp:1005: static llvm::Constant* llvm::ConstantArray::getImpl(llvm::ArrayType*, llvm::ArrayRef<llvm::Constant*>): Assertion `V[i]->getType() == Ty->getElementType() && "Wrong type in array element initializer"' failed.

signal (6): Aborted
in expression starting at /home/jeff/src/julia/test/core.jl:4930
gsignal at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
abort at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x7f0196091399)
__assert_fail at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
_ZN4llvm13ConstantArray7getImplEPNS_9ArrayTypeENS_8ArrayRefIPNS_8ConstantEEE at /home/jeff/src/julia/usr/bin/../lib/libLLVM-9jl.so (unknown line)
_ZN4llvm13ConstantArray3getEPNS_9ArrayTypeENS_8ArrayRefIPNS_8ConstantEEE at /home/jeff/src/julia/usr/bin/../lib/libLLVM-9jl.so (unknown line)
julia_const_to_llvm at /home/jeff/src/julia/src/intrinsics.cpp:260
emit_unbox at /home/jeff/src/julia/src/intrinsics.cpp:333
julia_to_native at /usr/include/c++/7/bits/stl_bvector.h:81 [inlined]
emit_a_ccall at /home/jeff/src/julia/src/ccall.cpp:1756
emit_ccall at /home/jeff/src/julia/src/ccall.cpp:1702
emit_expr at /home/jeff/src/julia/src/codegen.cpp:4170
emit_ssaval_assign at /home/jeff/src/julia/src/codegen.cpp:3862
emit_stmtpos at /home/jeff/src/julia/src/codegen.cpp:4056 [inlined]
emit_function at /home/jeff/src/julia/src/codegen.cpp:6665
jl_compile_linfo at /home/jeff/src/julia/src/codegen.cpp:1256