https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69300
Bug ID: 69300 Summary: g++ segfault on silly noexcept case Product: gcc Version: 5.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: redbeard0531 at gmail dot com Target Milestone: --- Created attachment 37359 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37359&action=edit Preprocessed test case This is a reduced example from a ridiculous code contest. It compiles with clang++ but segfaults during compilation on g++. It isn't something that I actually need to work, but I thought I'd report it since it probably shouldn't be crashing g++. Code: template<typename A> struct F { template<typename B> void f() && noexcept(&F::template f<B>) {} }; int main (int argc, char ** argv) { F<void>().f<int>(); } g++ output: > g++ -v -save-temps -std=c++14 bug.cpp Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /build/gcc/src/gcc-5.2.0/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --disable-multilib --disable-werror --enable-checking=release --with-default-libstdcxx-abi=gcc4-compatible Thread model: posix gcc version 5.2.0 (GCC) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++14' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/cc1plus -E -quiet -v -D_GNU_SOURCE bug.cpp -mtune=generic -march=x86-64 -std=c++14 -fpch-preprocess -o bug.ii ignoring nonexistent directory "/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../x86_64-unknown-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../include/c++/5.2.0 /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../include/c++/5.2.0/x86_64-unknown-linux-gnu /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../include/c++/5.2.0/backward /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/include /usr/local/include /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/include-fixed /usr/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++14' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/cc1plus -fpreprocessed bug.ii -quiet -dumpbase bug.cpp -mtune=generic -march=x86-64 -auxbase bug -std=c++14 -version -o bug.s GNU C++14 (GCC) version 5.2.0 (x86_64-unknown-linux-gnu) compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version 3.1.3-p4, MPC version 1.0.3 warning: GMP header version 6.0.0 differs from library version 6.1.0. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++14 (GCC) version 5.2.0 (x86_64-unknown-linux-gnu) compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version 3.1.3-p4, MPC version 1.0.3 warning: GMP header version 6.0.0 differs from library version 6.1.0. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 9ed1d81099b98de89457560501a9ea0c g++: internal compiler error: Segmentation fault (program cc1plus) Please submit a full bug report, with preprocessed source if appropriate. See <https://bugs.archlinux.org/> for instructions.