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From: "tlange at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug analyzer/106551] [13 Regression] dup2 causes -fanalyzer ICE in
 valid_to_unchecked_state, at analyzer/sm-fd.cc:751
Date: Sun, 14 Aug 2022 20:27:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106551

Tim Lange <tlange at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tlange at gcc dot gnu.org

--- Comment #4 from Tim Lange <tlange at gcc dot gnu.org> ---
Hi Immad,

while testing my patch on coreutils [1], I encountered another ICE at the s=
ame
line. I'm using the newest commit on the master at the time of writing this=
 [2]
(I've double-checked that I indeed have your fix included).

during IPA pass: analyzer
../lib/freopen.c: In function 'rpl_freopen':
../lib/freopen.c:82:19: internal compiler error: in valid_to_unchecked_stat=
e,
at analyzer/sm-fd.cc:751
   82 |               if (dup2 (nullfd, fd) < 0)
      |                   ^~~~~~~~~~~~~~~~~
0x7bc106 valid_to_unchecked_state
        ../../gcc/analyzer/sm-fd.cc:751
0x7bc106 valid_to_unchecked_state
        ../../gcc/analyzer/sm-fd.cc:742
0x7bc106 check_for_dup
        ../../gcc/analyzer/sm-fd.cc:990
0x12a5e8c on_stmt
        ../../gcc/analyzer/sm-fd.cc:805
0x124f4e4 ana::exploded_node::on_stmt(ana::exploded_graph&, ana::supernode
const*, gimple const*, ana::program_state*, ana::uncertainty_t*,
ana::path_context*)
        ../../gcc/analyzer/engine.cc:1449
0x1251f1b ana::exploded_graph::process_node(ana::exploded_node*)
        ../../gcc/analyzer/engine.cc:3868
0x1252dba ana::exploded_graph::process_worklist()
        ../../gcc/analyzer/engine.cc:3271
0x125514d ana::impl_run_checkers(ana::logger*)
        ../../gcc/analyzer/engine.cc:5912
0x125614e ana::run_checkers()
        ../../gcc/analyzer/engine.cc:5986
0x1245ee8 execute
        ../../gcc/analyzer/analyzer-pass.cc:87


[1] compiling coreutils commit:
https://git.savannah.gnu.org/gitweb/?p=3Dcoreutils.git;a=3Dcommit;h=3D9f71f=
478ec6929d323c17f0482db8791de87b4fd
[2]
https://gcc.gnu.org/git/?p=3Dgcc.git;a=3Dcommit;h=3Dfe4dc4f553d8639b0ce3465=
e5e6dcf61c1ae9752=