https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96409
Bug ID: 96409 Summary: A lambda with a template parameter list inside the template function using C++20 nested requirements clauses occurs internal compiler error Product: gcc Version: 10.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: hewillk at gmail dot com Target Milestone: --- Created attachment 48977 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48977&action=edit the preprocessed file Using built-in specs. COLLECT_GCC=/usr/local/bin/gcc-10 COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/10.1.0/libexec/gcc/x86_64-apple-darwin17/10.1.0/lto-wrapper Target: x86_64-apple-darwin17 Configured with: ../configure --build=x86_64-apple-darwin17 --prefix=/usr/local/Cellar/gcc/10.1.0 --libdir=/usr/local/Cellar/gcc/10.1.0/lib/gcc/10 --disable-nls --enable-checking=release --enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-10 --with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr --with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl --with-system-zlib --with-pkgversion='Homebrew GCC 10.1.0' --with-bugurl=https://github.com/Homebrew/homebrew-core/issues --disable-multilib SED=/usr/bin/sed Thread model: posix Supported LTO compression algorithms: zlib gcc version 10.1.0 (Homebrew GCC 10.1.0) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++2a' '-mmacosx-version-min=10.13.0' '-asm_macosx_version_min=10.13' '-mtune=core2' /usr/local/Cellar/gcc/10.1.0/libexec/gcc/x86_64-apple-darwin17/10.1.0/cc1plus -E -quiet -v -D__DYNAMIC__ main.cpp -fPIC -mmacosx-version-min=10.13.0 -mtune=core2 -std=c++2a -fpch-preprocess -o main.ii ignoring duplicate directory "/usr/local/include" ignoring nonexistent directory "/usr/local/Cellar/gcc/10.1.0/lib/gcc/10/gcc/x86_64-apple-darwin17/10.1.0/../../../../../../x86_64-apple-darwin17/include" #include "..." search starts here: #include <...> search starts here: . /usr/local/include /usr/local/Cellar/gcc/10.1.0/lib/gcc/10/gcc/x86_64-apple-darwin17/10.1.0/../../../../../../include/c++/10.1.0 /usr/local/Cellar/gcc/10.1.0/lib/gcc/10/gcc/x86_64-apple-darwin17/10.1.0/../../../../../../include/c++/10.1.0/x86_64-apple-darwin17 /usr/local/Cellar/gcc/10.1.0/lib/gcc/10/gcc/x86_64-apple-darwin17/10.1.0/../../../../../../include/c++/10.1.0/backward /usr/local/Cellar/gcc/10.1.0/lib/gcc/10/gcc/x86_64-apple-darwin17/10.1.0/include /usr/local/Cellar/gcc/10.1.0/include /usr/local/Cellar/gcc/10.1.0/lib/gcc/10/gcc/x86_64-apple-darwin17/10.1.0/include-fixed /usr/include /System/Library/Frameworks /Library/Frameworks End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++2a' '-mmacosx-version-min=10.13.0' '-asm_macosx_version_min=10.13' '-mtune=core2' /usr/local/Cellar/gcc/10.1.0/libexec/gcc/x86_64-apple-darwin17/10.1.0/cc1plus -fpreprocessed main.ii -fPIC -quiet -dumpbase main.cpp -mmacosx-version-min=10.13.0 -mtune=core2 -auxbase main -std=c++2a -version -o main.s GNU C++17 (Homebrew GCC 10.1.0) version 10.1.0 (x86_64-apple-darwin17) compiled by GNU C version 10.1.0, GMP version 6.2.0, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.22.1-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++17 (Homebrew GCC 10.1.0) version 10.1.0 (x86_64-apple-darwin17) compiled by GNU C version 10.1.0, GMP version 6.2.0, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.22.1-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: b1074358e29f54f1a357a06623845700 main.cpp: In instantiation of 'void f(T) [with T = std::vector<int>]': main.cpp:14:23: required from here main.cpp:7:39: internal compiler error: in dependent_type_p, at cp/pt.c:26343 7 | if constexpr (requires { requires std::same_as<U, std::vector<typename U::value_type>>; }); | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ libbacktrace could not find executable to open Please submit a full bug report, with preprocessed source if appropriate. See <https://github.com/Homebrew/homebrew-core/issues> for instructions.