https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109431
Bug ID: 109431 Summary: internal compiler error: in output_constructor_regular_field (varasm.c:5207) Product: gcc Version: 9.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gh0s-t at yandex dot ru Target Milestone: --- Created attachment 54815 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54815&action=edit preprocessed file for short source example Problem occurs from 9.1 to newer gcc versions. But code compiles on older convenient gcc versions. godbolt.org used. As I can see, the problem is in function body static and constexpr keywords mixing at array aggregate initialization with empty initializer-list (at line #111 in preprocessed file). Using built-in specs. COLLECT_GCC=/opt/compiler-explorer/gcc-9.1.0/bin/g++ Target: x86_64-linux-gnu Configured with: ../gcc-9.1.0/configure --prefix=/opt/compiler-explorer/gcc-build/staging --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --disable-bootstrap --enable-multiarch --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --enable-clocale=gnu --enable-languages=c,c++,fortran,ada --enable-ld=yes --enable-gold=yes --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto --enable-plugins --enable-threads=posix --with-pkgversion=Compiler-Explorer-Build Thread model: posix gcc version 9.1.0 (Compiler-Explorer-Build) COLLECT_GCC_OPTIONS='-fdiagnostics-color=always' '-g' '-o' '/app/output.s' '-masm=intel' '-S' '-v' '-std=c++17' '-g' '-D' '_REENTRANT' '-fPIC' '-pipe' '-Wall' '-Wextra' '-fsanitize=undefined' '-fno-strict-aliasing' '-fwrapv' '-fno-aggressive-loop-optimizations' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/compiler-explorer/gcc-9.1.0/bin/../libexec/gcc/x86_64-linux-gnu/9.1.0/cc1plus -quiet -v -imultiarch x86_64-linux-gnu -iprefix /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/ -D_GNU_SOURCE -D _REENTRANT <source> -quiet -dumpbase example.cpp -masm=intel -mtune=generic -march=x86-64 -auxbase-strip /app/output.s -g -g -Wall -Wextra -std=c++17 -version -fdiagnostics-color=always -fPIC -fsanitize=undefined -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -o /app/output.s GNU C++17 (Compiler-Explorer-Build) version 9.1.0 (x86_64-linux-gnu) compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../x86_64-linux-gnu/include" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/x86_64-linux-gnu" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/backward" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/include" ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/include-fixed" ignoring nonexistent directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../x86_64-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0 /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/x86_64-linux-gnu /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/backward /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/include /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/include-fixed /usr/local/include /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../include /usr/include/x86_64-linux-gnu /usr/include End of search list. GNU C++17 (Compiler-Explorer-Build) version 9.1.0 (x86_64-linux-gnu) compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 2c5ce497dfd6253343a5b735244577eb <source>: In function 'int main()': <source>:105:16: warning: variable 's' set but not used [-Wunused-but-set-variable] 105 | auto const s = parameterLimits<float>(ParamId::Id1); | ^ <source>: At global scope: <source>:107:1: internal compiler error: in output_constructor_regular_field, at varasm.c:5207 107 | } | ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions. ASM generation compiler returned: 1 Using built-in specs. COLLECT_GCC=/opt/compiler-explorer/gcc-9.1.0/bin/g++ COLLECT_LTO_WRAPPER=/opt/compiler-explorer/gcc-9.1.0/bin/../libexec/gcc/x86_64-linux-gnu/9.1.0/lto-wrapper Target: x86_64-linux-gnu Configured with: ../gcc-9.1.0/configure --prefix=/opt/compiler-explorer/gcc-build/staging --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --disable-bootstrap --enable-multiarch --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --enable-clocale=gnu --enable-languages=c,c++,fortran,ada --enable-ld=yes --enable-gold=yes --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-linker-build-id --enable-lto --enable-plugins --enable-threads=posix --with-pkgversion=Compiler-Explorer-Build Thread model: posix gcc version 9.1.0 (Compiler-Explorer-Build) COLLECT_GCC_OPTIONS='-fdiagnostics-color=always' '-g' '-o' '/app/output.s' '-v' '-std=c++17' '-g' '-D' '_REENTRANT' '-fPIC' '-pipe' '-Wall' '-Wextra' '-fsanitize=undefined' '-fno-strict-aliasing' '-fwrapv' '-fno-aggressive-loop-optimizations' '-L.' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/compiler-explorer/gcc-9.1.0/bin/../libexec/gcc/x86_64-linux-gnu/9.1.0/cc1plus -quiet -v -imultiarch x86_64-linux-gnu -iprefix /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/ -D_GNU_SOURCE -D _REENTRANT <source> -quiet -dumpbase example.cpp -mtune=generic -march=x86-64 -auxbase example -g -g -Wall -Wextra -std=c++17 -version -fdiagnostics-color=always -fPIC -fsanitize=undefined -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -o - | /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../x86_64-linux-gnu/bin/as -v --64 -o /tmp/ccOkx2if.o GNU assembler version 2.29.1 (x86_64-linux-gnu) using BFD version (Compiler-Explorer-Build) 2.29.1 GNU C++17 (Compiler-Explorer-Build) version 9.1.0 (x86_64-linux-gnu) compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../x86_64-linux-gnu/include" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/x86_64-linux-gnu" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/backward" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/include" ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" ignoring duplicate directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/include-fixed" ignoring nonexistent directory "/opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../x86_64-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0 /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/x86_64-linux-gnu /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/../../../../include/c++/9.1.0/backward /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/include /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/x86_64-linux-gnu/9.1.0/include-fixed /usr/local/include /opt/compiler-explorer/gcc-9.1.0/bin/../lib/gcc/../../include /usr/include/x86_64-linux-gnu /usr/include End of search list. GNU C++17 (Compiler-Explorer-Build) version 9.1.0 (x86_64-linux-gnu) compiled by GNU C version 7.3.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 2c5ce497dfd6253343a5b735244577eb <source>: In function 'int main()': <source>:105:16: warning: variable 's' set but not used [-Wunused-but-set-variable] 105 | auto const s = parameterLimits<float>(ParamId::Id1); | ^ <source>: At global scope: <source>:107:1: internal compiler error: in output_constructor_regular_field, at varasm.c:5207 107 | } | ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://gcc.gnu.org/bugs/> for instructions. Execution build compiler returned: 1