The following invalid code snippet triggers an ICE since GCC 4.0.0: ===================================== struct A { static int i; };
int j = __builtin_offsetof(volatile A, i); ===================================== bug.cc:6: internal compiler error: in fold_offsetof_1, at c-common.c:6316 Please submit a full bug report, [etc.] In addition there are diagnostic issues with a similar testcase: ===================================== struct A { static void foo(); }; int i = __builtin_offsetof(volatile A, foo[0]); ===================================== bug.cc:6: error: pointer to a function used in arithmetic bug.cc:6: error: cannot apply 'offsetof' to member function '#'compound_expr' not supported by dump_decl#<declaration error>' Testing a patch. -- Summary: [4.1/4.2/4.3 regression] Trouble with __builtin_offsetof and volatile Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, diagnostic, monitored Severity: normal Priority: P3 Component: c++ AssignedTo: reichelt at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30852