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
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 /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
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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
during RTL pass: expand
main.cpp: In copy constructor 'vector::vector(const vector&)':
main.cpp:7:109: internal compiler error: in assign_temp, at function.c:984
    7 |     : alloc_(std::allocator_traits<std::allocator<int>>::select_on_container_copy_construction(other.alloc_)) { }
      |                                                                                                             ^
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.