https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70709
Bug ID: 70709 Summary: gcc hangs on valid C++ code on x86_64-linux-gnu Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- The following code causes an ICE when compiled with the current gcc trunk on x86_64-linux-gnu. It also affects 4.8.x and later, and is a regression from 4.7.x. $ g++-trunk -v Using built-in specs. COLLECT_GCC=g++-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto --prefix=/usr/local/gcc-trunk --disable-bootstrap Thread model: posix gcc version 7.0.0 20160417 (experimental) [trunk revision 235070] (GCC) $ $ g++-4.7 -c small.cpp $ clang++-3.8 -c small.cpp $ $ g++-trunk -c small.cpp^C $ timeout -s 9 10 g++-trunk -c small.cpp Killed $ --------------------- struct A { A (int); }; struct B { B () {} A a[0]; }; struct C { C () {} B a[0]; };