https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83138
Bug ID: 83138 Summary: ICE: Segfault expanding function parameter pack in subsequent sibling pack declaration Product: gcc Version: 8.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: hstong at ca dot ibm.com Target Milestone: --- Given the self-contained source below, GCC ICEs with a segmentation fault. This used to work with GCC 4.7.4. ### SOURCE (<stdin>): template <typename ...T> void f(T ...args, char ...args2[][sizeof args]) { } template <typename T> void g(T) { } void h() { g(&f<int>); } ### ACTUAL OUTPUT: g++: internal compiler error: Segmentation fault signal terminated program cc1plus Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions. ### EXPECTED OUTPUT: Clean compile. ### COMPILER INVOCATION COMMAND: g++ -fsyntax-only -x c++ -std=c++11 - ### COMPILER VERSION INFO (g++ -v): Using built-in specs. COLLECT_GCC=/opt/wandbox/gcc-head/bin/g++ COLLECT_LTO_WRAPPER=/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../source/configure --prefix=/opt/wandbox/gcc-head --enable-languages=c,c++ --disable-multilib --without-ppl --without-cloog-ppl --enable-checking=release --disable-nls --enable-lto LDFLAGS=-Wl,-rpath,/opt/wandbox/gcc-head/lib,-rpath,/opt/wandbox/gcc-head/lib64,-rpath,/opt/wandbox/gcc-head/lib32 Thread model: posix gcc version 8.0.0 20171122 (experimental) (GCC)