master branch: commit r15-5535 failed to bootstrap on Linux/i686 (commit r15-5425 builds)!

[haochenj]

make[2]: Entering directory '/home/haochenj/src/gcc-regression'
rm -rf bld
mkdir -p bld
cd bld; \
CC="gcc -m32 -fno-lto" CXX="g++ -m32 -fno-lto" ../src-master/configure \
	--with-arch=corei7 --with-cpu=intel --enable-clocale=gnu --with-system-zlib --enable-shared --enable-cet --with-demangler-in-ld --enable-libmpx --prefix=/usr/gcc-15.0.0 i686-linux --with-fpmath=sse 
configure: WARNING: you should use --build, --host, --target
    grep -E "(error:|Error)" makelog.r15-5535.i686.intel >> makelog.r15-5535.i686.intel.mail; \
    tail -n +20 makelog.r15-5535.i686.intel | grep -C 10 -E "error:|Error:" >> makelog.r15-5535.i686.intel.mail; \
cc1: internal compiler error: in fail, at selftest.cc:47
cc1plus: internal compiler error: in fail, at selftest.cc:47
make[6]: *** [../../src-master/gcc/c/Make-lang.in:153: s-selftest-c] Error 1
make[6]: *** [../../src-master/gcc/cp/Make-lang.in:256: s-selftest-c++] Error 1
make[5]: *** [Makefile:5063: all-stage1-gcc] Error 2
make[4]: *** [Makefile:29871: stage1-bubble] Error 2
make[3]: *** [Makefile:30272: bootstrap] Error 2
make[2]: *** [Makefile:313: bootstrap] Error 2
==================== Detailed Info around error (+- 10 Lines) ====================
done
if [ xstmp-fixinc != x ]; then \
  rm -f include-fixed/README; \
  cp ../../src-master/gcc/../fixincludes/README-fixinc include-fixed/README; \
  chmod a+r include-fixed/README; \
fi;
echo timestamp > stmp-int-hdrs
LC_ALL=C GCC_COLORS= /home/haochenj/src/gcc-regression/bld/./gcc/xgcc -B/home/haochenj/src/gcc-regression/bld/./gcc/ -fno-checking -xc -nostdinc /dev/null -S -o /dev/null -fself-test=../../src-master/gcc/testsuite/selftests
LC_ALL=C GCC_COLORS= /home/haochenj/src/gcc-regression/bld/./gcc/xgcc -B/home/haochenj/src/gcc-regression/bld/./gcc/ -fno-checking -xc++ -nostdinc /dev/null -S -o /dev/null -fself-test=../../src-master/gcc/testsuite/selftests
../../src-master/gcc/json-parsing.cc:2031: test_parse_number: FAIL: ASSERT_EQ ((3.141), (((const json::float_number *)jv)->get ()))
cc1: internal compiler error: in fail, at selftest.cc:47
../../src-master/gcc/json-parsing.cc:2031: test_parse_number: FAIL: ASSERT_EQ ((3.141), (((const json::float_number *)jv)->get ()))
cc1plus: internal compiler error: in fail, at selftest.cc:47
0xa453473 internal_error(char const*, ...)
	../../src-master/gcc/diagnostic-global-context.cc:518
0xa42a4a2 fancy_abort(char const*, int, char const*)
	../../src-master/gcc/diagnostic.cc:1697
0xa42032e selftest::fail(selftest::location const&, char const*)
	../../src-master/gcc/selftest.cc:47
0xa48f7a2 test_parse_number
	../../src-master/gcc/json-parsing.cc:2031
0xa492744 selftest::json_parser_cc_tests()
	../../src-master/gcc/json-parsing.cc:2379