[LLVMbugs] [Bug 80] New: llvm-gcc coughs up unsavory substances when taking ptr to empty struct

[bugzilla-daemon at zion.cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=80

           Summary: llvm-gcc coughs up unsavory substances when taking ptr
                    to empty struct
           Product: tools
           Version: 1.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: llvm-gcc
        AssignedTo: sabre at nondot.org
        ReportedBy: gaeke+bugs at uiuc.edu


108 gally> llvm-gcc -c cracktacular.c
cracktacular.c: In function `foo':

cracktacular.c:3: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.cs.uiuc.edu> for instructions.
109 gally> cat cracktacular.c
typedef struct { } the_coolest_struct_in_the_world;
extern the_coolest_struct_in_the_world xyzzy;
void *foo() { return &xyzzy; }


The unfortunate thing is that regular old gcc accepts this code, and I think it
should be giving us a parse error. In ISO9899 6.2.5 (20), it says that
"A structure type describes a sequentially allocated *nonempty* set of member
objects..." (emphasis mine).



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