[patch] Fix second part of PR c++/27601: ICE using offsetof with member functions

[Mark Mitchell]

Volker Reichelt wrote:
> While applying
>   http://gcc.gnu.org/ml/gcc-patches/2006-06/msg00161.html
> I noticed that the following invalid code snippet also triggers an ICE:
> 
>   struct bar {
>     void foo();
>   };
> 
>   int a = __builtin_offsetof(bar, foo);
> 
> bug.cc:5: internal compiler error: tree check: expected field_decl, have baselink in fold_offsetof_1, at c-common.c:5992
> Please submit a full bug report, [etc.]

Can't we catch this in the C++ parser?  __builtin_offsetof is handled by
its own parsing routine, so before we call fold_offsetof, we already
know what EXPR is.  Wouldn't calling invalid_nonstatic_memfn_p fix this?


-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
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