https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68771
--- Comment #18 from Daniel Vollmer <zerolo at gmail dot com> --- (In reply to Iain Sandoe from comment #17) > hmm. this one is not repeating for me - please can you tell me: > OS version and the svn rev (or GIT sha1) for the version of 7 branch that > you're using? > (I assume without patches?) macOS Mojave 10.14.4 (18E226) > g++-7 -v Using built-in specs. COLLECT_GCC=g++-7 COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc@7/7.4.0/libexec/gcc/x86_64-apple-darwin18.2.0/7.4.0/lto-wrapper Target: x86_64-apple-darwin18.2.0 Configured with: ../configure --build=x86_64-apple-darwin18.2.0 --prefix=/usr/local/Cellar/gcc@7/7.4.0 --libdir=/usr/local/Cellar/gcc@7/7.4.0/lib/gcc/7 --enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-7 --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 --enable-checking=release --with-pkgversion='Homebrew GCC 7.4.0' --with-bugurl=https://github.com/Homebrew/homebrew-core/issues --disable-nls --disable-multilib --with-native-system-header-dir=/usr/include --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk Thread model: posix gcc version 7.4.0 (Homebrew GCC 7.4.0) The homebrew build instructions are here: https://github.com/Homebrew/homebrew-core/blob/master/Formula/gcc%407.rb so that seems to be 7.4.0 without any patches.