On Linux/x86_64,
004438857554f47eb5491d59b067e56fdacf0e74 is the first bad commit
commit 004438857554f47eb5491d59b067e56fdacf0e74
Author: Jakub Jelinek <[email protected]>
Date: Wed Nov 26 15:01:11 2025 +0100
Change the default C++ dialect to gnu++20
caused
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C -std=c++20 at
line 12 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C -std=c++20
telltale event that we are going within a deeper frame than 'main' (test for
warnings, line 9)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C -std=c++20
(test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C -std=c++26 at
line 12 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C -std=c++26
telltale event that we are going within a deeper frame than 'main' (test for
warnings, line 9)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C -std=c++26
(test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++14 at line 12 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++14 at line 17 (test for warnings, line 10)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++14 at line 18 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++14 at line 19 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++14 at line 20 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++20 at line 12 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++20 at line 18 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++20 at line 19 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
-std=c++20 at line 20 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++14
at line 13 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++14
at line 18 (test for warnings, line 11)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++14
at line 19 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++14
at line 20 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++14
at line 21 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++20
at line 13 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++20
at line 19 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++20
at line 20 (test for warnings, line 12)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C -std=c++20
at line 21 (test for warnings, line 12)
FAIL: g++.dg/ipa/devirt-2.C -std=gnu++20 scan-ipa-dump cp "Discovered a
virtual call to a known target.*B::foo"
FAIL: g++.dg/ipa/devirt-2.C -std=gnu++26 scan-ipa-dump cp "Discovered a
virtual call to a known target.*B::foo"
FAIL: g++.dg/ipa/devirt-2.C -std=gnu++98 scan-ipa-dump cp "Discovered a
virtual call to a known target.*B::foo"
FAIL: g++.target/i386/vect-pragma-target-2.C -std=gnu++20 (test for excess
errors)
FAIL: g++.target/i386/vect-pragma-target-2.C -std=gnu++26 (test for excess
errors)
FAIL: g++.target/i386/vect-pragma-target-2.C -std=gnu++98 (test for excess
errors)
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-5628/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}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers.C
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="analyzer.exp=g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/ipa/devirt-2.C
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/ipa/devirt-2.C
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/ipa/devirt-2.C
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/ipa/devirt-2.C
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="i386.exp=g++.target/i386/vect-pragma-target-2.C
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="i386.exp=g++.target/i386/vect-pragma-target-2.C
--target_board='unix{-m64\ -march=cascadelake}'"
(Please directly reply to this email for question about this report.)
(If you met problems with cascadelake related, disabling AVX512F in command
line might save that.)
(However, please make sure that there is no potential problems with AVX512.)
