https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66896
Bug ID: 66896 Summary: ipa-prop.c:2479 runtime error: member call on null pointer of type 'struct ipa_polymorphic_call_context' Product: gcc Version: 5.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: zeccav at gmail dot com Target Milestone: --- //must be compiled with -O2 , or "-O[1] -fdevirtualize" //ipa-prop.c:2479:30: runtime error: member call on null pointer of type 'struct ipa_polymorphic_call_context' //gcc ipa-prop.c source line "dst_ctx->combine_with (ctx);" //because dst_ctx is NULL //double checked with "gcc_assert(dst_ctx);" void f2 (void *); void f3 (); struct A { int *a; A (); ~A () { a3 (); } int a1 (int * p) { if (!p) f3 (); f2 (p); } void a3 () { if (*a) a1 (a); } }; struct B : A {~B () { a3 ();}}; struct F {}; struct G : F {B g;}; void foo () {G g;}