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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/94618] New: [10 Regression] '-fcompare-debug' failure
 (length) with -O2 -fnon-call-exceptions
Date: Thu, 16 Apr 2020 13:04:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94618

            Bug ID: 94618
           Summary: [10 Regression] '-fcompare-debug' failure (length)
                    with -O2 -fnon-call-exceptions
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

Created attachment 48289
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D48289&action=3Dedit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-g++ -O2 -fnon-call-exceptions -fcompare-debug testcas=
e.C
x86_64-pc-linux-gnu-g++: error: testcase.C: '-fcompare-debug' failure (leng=
th)

$ x86_64-pc-linux-gnu-g++ -v
Using built-in specs.
COLLECT_GCC=3D/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-g=
++
COLLECT_LTO_WRAPPER=3D/repo/gcc-trunk/binary-trunk-r10-7738-20200415114440-=
g49795733fdc-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-l=
inux-gnu/10.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=3Dc,c++
--enable-valgrind-annotations --disable-nls --enable-checking=3Dyes,rtl,df,=
extra
--with-cloog --with-ppl --with-isl --build=3Dx86_64-pc-linux-gnu
--host=3Dx86_64-pc-linux-gnu --target=3Dx86_64-pc-linux-gnu
--with-ld=3D/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=3D/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=3D/repo/gcc-trunk//binary-trunk-r10-7738-20200415114440-g49795733f=
dc-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200415 (experimental) (GCC)=