[LLVMbugs] [Bug 5692] New: clang rejects invalid code with wrong diagnostic

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5692

           Summary: clang rejects invalid code with wrong diagnostic
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Keywords: quality-of-implementation
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: clattner at apple.com
                CC: llvmbugs at cs.uiuc.edu


This invalid code (u is not defined):

void foo() {
  (union u)4;
}

is rejected with:

t.c:3:3: error: cast to union type from type 'int' not present in union
  (union u)4;
  ^        ~


The diagnostic should say that 'u' is not complete.


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