master branch: commit r15-1614 failed to bootstrap on Linux/i686 (commit r15-1594 builds)!

[haochenj via Gcc-regression]

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 "Error " makelog.r15-1614.i686.intel >> 
makelog.r15-1614.i686.intel.mail; \
make[6]: [Makefile:1832: i686-linux/bits/largefile-config.h] Error 1 (ignored)
make[6]: *** [Makefile:2556: i386.o] Error 1
make[5]: *** [Makefile:5108: all-stage2-gcc] Error 2
make[4]: *** [Makefile:30031: stage2-bubble] Error 2
make[3]: *** [Makefile:30275: bootstrap] Error 2
make[2]: *** [Makefile:313: bootstrap] Error 2
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text_art::style::color::print_sgr(pretty_printer*, bool, bool&) const’:
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punctuation sequence ‘;’ in format [-Wformat-diag]
  151 |         pp_printf (pp, ";5;%i", (int)u.m_8bit);
      |                         ^
../../src-master/gcc/text-art/style.cc:161:25: warning: spurious leading 
punctuation sequence ‘;’ in format [-Wformat-diag]
  161 |         pp_printf (pp, ";2;%i;%i;%i",
      |                         ^
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selftest::test_spans_3()’:
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in format [-Wformat-diag]
  981 |                                                      "'buf' (char[%i])",
      |                                                              ^~~~
../../src-master/gcc/text-art/table.cc:981:69: warning: spurious trailing 
punctuation sequence ‘])’ in format [-Wformat-diag]
  981 |                                                      "'buf' (char[%i])",
      |                                                                     ^~
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