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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/107396] New: [12 regression] new test case
 gcc.dg/analyzer/pipe-glibc.c in r13-3466-g792f039fc37faa fails with excess
 errors
Date: Tue, 25 Oct 2022 17:00:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107396

            Bug ID: 107396
           Summary: [12 regression] new test case
                    gcc.dg/analyzer/pipe-glibc.c in
                    r13-3466-g792f039fc37faa fails with excess errors
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

g:792f039fc37faa3446725a643c8018f084e8ccab, r13-3466-g792f039fc37faa
make  -k check-gcc RUNTESTFLAGS=3D"analyzer.exp=3Dgcc.dg/analyzer/pipe-glib=
c.c"
FAIL: gcc.dg/analyzer/pipe-glibc.c (test for excess errors)
# of unexpected failures        1


I am only seeing this failure on power 9.  It works fine on power 8 and pow=
er
10.


commit 792f039fc37faa3446725a643c8018f084e8ccab (HEAD, refs/bisect/bad)
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Mon Oct 24 16:38:22 2022 -0400

    analyzer: handle "pipe" and "pipe2" [PR106300]

spawn -ignore SIGHUP /home/seurer/gcc/git/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/git/build/gcc-test/gcc/
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/analyzer/pipe-glibc.c
-fdiagnostics-plain-output -fanalyzer -Wanalyzer-too-complex
-fanalyzer-call-summaries -S -o pipe-glibc.s^M
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/analyzer/pipe-glibc.c: In
function 'write_to_pipe':^M
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/analyzer/pipe-glibc.c:28=
:3:
warning: use of possibly-NULL 'stream' where non-null expected [CWE-690]
[-Wanalyzer-possible-null-argument]^M
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/analyzer/pipe-glibc.c:27=
:12:
note: (1) this call could return NULL^M
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/analyzer/pipe-glibc.c:28=
:3:
note: (2) argument 4 ('stream') from (1) could be NULL where non-null
expected^M
<built-in>: note: argument 4 of '__builtin_fwrite' must be non-null^M
FAIL: gcc.dg/analyzer/pipe-glibc.c (test for excess errors)
Excess errors:
/home/seurer/gcc/git/gcc-test/gcc/testsuite/gcc.dg/analyzer/pipe-glibc.c:28=
:3:
warning: use of possibly-NULL 'stream' where non-null expected [CWE-690]
[-Wanalyzer-possible-null-argument]=