[LLVMbugs] [Bug 3396] New: Crash in Sema with non-constant offsetof

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Sat Jan 24 14:36:20 PST 2009


           Summary: Crash in Sema with non-constant offsetof
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: sharparrow1 at yahoo.com
                CC: llvmbugs at cs.uiuc.edu


struct sockaddr_un {
 unsigned char sun_len;
 char sun_path[104];
int a() {
int a[__builtin_offsetof(struct sockaddr_un, sun_path[len+1])];

Crashes with the following message:
llvm::APSInt clang::Expr::getIntegerConstantExprValue(clang::ASTContext&)
const: Assertion `success && "Illegal argument to getIntegerConstantExpr"'

Note that non-constant offsetof is a gcc extension.

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