http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51431
Bug #: 51431 Summary: [4.5/4.6/4.7 Regression] ICE with invalid use of abstract class Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: reich...@gcc.gnu.org The following invalid code snippet triggers an ICE since GCC 4.4.0: =================================== struct A { virtual void foo() = 0; }; struct B { A a; B() : a() {} }; =================================== bug.cc:8:5: error: cannot declare field 'B::a' to be of abstract type 'A' bug.cc:1:8: note: because the following virtual functions are pure within 'A': bug.cc:3:16: note: virtual void A::foo() bug.cc: In constructor 'B::B()': bug.cc:9:11: error: cannot allocate an object of abstract type 'A' bug.cc:1:8: note: since type 'A' has pure virtual functions bug.cc:9:11: internal compiler error: tree check: expected aggr_init_expr, have error_mark in build_value_init, at cp/init.c:365 Please submit a full bug report, [etc.]