[r14-1873 Regression] FAIL: 25_algorithms/set_union/constrained.cc (test for excess errors) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

6a2e8dcbbd4bab374b27abea375bf7a921047800 is the first bad commit
commit 6a2e8dcbbd4bab374b27abea375bf7a921047800
Author: Manolis Tsamis <manolis.tsamis@vrull.eu>
Date:   Thu May 25 13:44:41 2023 +0200

    cprop_hardreg: Enable propagation of the stack pointer if possible

caused

FAIL: 25_algorithms/set_union/constrained.cc (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-1873/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check RUNTESTFLAGS="conformance.exp=25_algorithms/set_union/constrained.cc --target_board='unix{-m64}'"

(Please do not reply to this email, for question about this report, contact me at haochen dot jiang at intel.com)