[LLVMbugs] [Bug 4281] New: Making typedefs of const stuff makes Clang crash

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu May 28 14:09:11 PDT 2009


           Summary: Making typedefs of const stuff makes Clang crash
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: ed at 80386.nl
                CC: llvmbugs at cs.uiuc.edu
            Blocks: 3696

The following C code makes Clang die:

typedef struct {
        int i;
} something;

typedef const something const_something;

something fail(void);

main(int argc, char *argv[])
        const_something R = fail();

cc -O2 -pipe   llvm-crash.c  -o llvm-crash
Assertion failed: (CGF.getContext().typesAreCompatible(
E->getType().getUnqualifiedType()) && "Implicit cast types must be
compatible"), function VisitImplicitCastExpr, file
llvm/tools/clang/lib/CodeGen/CGExprAgg.cpp, line 181.
Stack dump:
0.      Program arguments: /usr/bin/../libexec/clang-cc -triple
x86_64-undermydesk-freebsd8.0 -S -disable-free -main-file-name llvm-crash.c
--relocation-model static --disable-fp-elim --unwind-tables=1 --mcpu=x86-64
--fmath-errno=1 -O2 -fdiagnostics-show-option -o /tmp/cc-k2ODg6.s -x c
1.      <eof> parser at end of file
2.      llvm-crash.c:10:1: LLVM IR generation of declaration 'main'
3.      llvm-crash.c:11:1: LLVM IR generation of compound statement ('{}')

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