file.log

==> Installing homebrew/versions/gcc47
==> Downloading http://ftpmirror.gnu.org/gcc/gcc-4.7.4/gcc-4.7.4.tar.bz2
==> Downloading from http://mirror.tochlab.net/pub/gnu/gcc/gcc-4.7.4/gcc-4.7.4.tar.bz2
######################################################################## 100.0%
==> Downloading https://gcc.gnu.org/bugzilla/attachment.cgi?id=35773
######################################################################## 100.0%
==> Downloading https://raw.githubusercontent.com/Homebrew/patches/7293b7d3/gcc47/patch-10.10.diff
######################################################################## 100.0%
==> Patching
patching file gcc/config/darwin.c
Hunk #1 succeeded at 1197 (offset -62 lines).
patching file gcc/config/darwin-c.c
patching file gcc/config/darwin-driver.c
==> ../configure --build=x86_64-apple-darwin15.2.0 --prefix=/usr/local/Cellar/gcc47/4.7.4 --enable-languages=c,c++,objc,obj-c++ --program-suffix=-4.7 --with-gm
==> make bootstrap
Last 15 lines from /Users/mzhukov/Library/Logs/Homebrew/gcc47/02.make:
	  cppspec.o driver-i386.o darwin-driver.o libcommon-target.a \
	   libcommon.a ../libcpp/libcpp.a  -liconv ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a
clang   -g -fkeep-inline-functions -DIN_GCC   -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H  -o g++ \
	  gcc.o ggc-none.o g++spec.o driver-i386.o darwin-driver.o libcommon-target.a \
	   libcommon.a ../libcpp/libcpp.a  -liconv ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a
/private/tmp/gcc4720160110-25492-1vz2i65/gcc-4.7.4/build/./gcc/xgcc -B/private/tmp/gcc4720160110-25492-1vz2i65/gcc-4.7.4/build/./gcc/ -dumpspecs > tmp-specs
/bin/sh: line 1: 47680 Segmentation fault: 11  /private/tmp/gcc4720160110-25492-1vz2i65/gcc-4.7.4/build/./gcc/xgcc -B/private/tmp/gcc4720160110-25492-1vz2i65/gcc-4.7.4/build/./gcc/ -dumpspecs > tmp-specs
make[3]: *** [specs] Error 139
make[3]: *** Waiting for unfinished jobs....
/bin/sh ../../gcc/../move-if-change tmp-automata.c insn-automata.c
echo timestamp > s-automata
rm gcc.pod
make[2]: *** [all-stage1-gcc] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [bootstrap] Error 2

READ THIS: https://git.io/brew-troubleshooting
If reporting this issue please do so at (not Homebrew/homebrew):
  https://github.com/Homebrew/homebrew-versions/issues