clang crashes redeclaring union tag as enum

[efriedma-quic]

Bugzilla Link	2321
Resolution	FIXED
Resolved on	Mar 12, 2010 00:57
Version	unspecified
OS	Linux

Extended Description

union u0;
enum u0 { U0A };

Crashes with assertion:
clang: /home/eli/llvm/include/llvm/Support/Casting.h:199: typename llvm::cast_retty<To, From>::ret_type llvm::cast(const Y&) [with X = clang::EnumDecl, Y = clang::Decl*]: Assertion `isa(Val) && "cast() argument of incompatible type!"' failed.

[llvmbot]

I cannot reproduce this:

ddunbar@il0102b-dhcp47:rt$ ccc foo.c
foo.c
clang -emit-llvm-bc -o foo.o foo.c
foo.c:2:1: error: use of 'u0' with tag type that does not match previous declaration
enum u0 { U0A };
^
foo.c:1:7: error: previous use is here
union u0;
^
2 diagnostics generated.

[efriedma-quic]

If I recall correctly, this was fixed relatively recently... I don't know what commit it was off the top of my head, though.

[llvmbot]

I'm closing as fixed.