[Bug c++/57387] New: Passing parameter pack to emplace stl function cause compilation bug

[Bug c++/57387] New: Passing parameter pack to emplace stl function cause compilation bug

[avraammauridis at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57387

            Bug ID: 57387
           Summary: Passing parameter pack to emplace stl function cause
                    compilation bug
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: avraammauridis at gmail dot com

Created attachment 30174
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30174&action=edit
bug output

g++ -std=c++0x stlstudy.cc
‘
Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cc7q32tE.out file, please attach this to
your bugreport.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/57287] GCC 4.9.0 fails to build GDB on Ubuntu 12.04
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW287

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xinliangli at gmail dot com

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
tree-ssa-uninit.c somehow fails to properly handle abnormal edges.

Index: tree-ssa-uninit.c
==================================================================--- tree-ssa-uninit.c   (revision 199249)
+++ tree-ssa-uninit.c   (working copy)
@@ -1919,7 +1919,8 @@ find_uninit_use (gimple phi, unsigned un
             }

           worklist->safe_push (use_stmt);
-          pointer_set_insert (possibly_undefined_names, phi_result);
+         if (!SSA_NAME_OCCURS_IN_ABNORMAL_PHI (phi_result))
+           pointer_set_insert (possibly_undefined_names, phi_result);
         }
     }

fixes the issue but that doesn't look the very best place to fix it
and it doesn't look fully correct.  It should be enough to not consider
values flowing across abnormal edges - but that's already done (but somehow
not in a complete manner).

I'm trying to reduce the testcase to get a better idea what is going wrong
here.

[Bug c++/57387] Passing parameter pack to emplace stl function cause compilation bug

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57387

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.8.0

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Seems to be fixed for 4.8 already.

[Bug c++/57387] Passing parameter pack to emplace stl function cause compilation bug

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57387

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Dup.

*** This bug has been marked as a duplicate of bug 57086 ***