https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64703
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |msebor at gcc dot gnu.org --- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> --- The test case is invalid because it accesses the value of the opd object via a pointer to a function when C allows an object to have its value accessed only by an lvalue of a compatible type. A simpler test case that demonstrates a similar issue is below: #include <assert.h> struct X { const char *s; }; struct Y { unsigned long n; }; const char* __attribute__ ((weak)) foo (unsigned long value) { struct Y y; if (value) { y.n = ((struct Y*)value)->n; value = (unsigned long)&y; } return ((struct X*)value)->s; } int main (void) { struct Y y = { 123 }; unsigned long n = (unsigned long)foo ((unsigned long)&y); assert (n == y.n); return 0; }