[Bug c++/14640] New: [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[Bug c++/14640] New: [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

[forwarded from http://bugs.debian.org/238621]

A miscompilation of mozilla-firefox.

3.3 CVS 20040306 is known to work, 20040314 fails.

A comment from the bug report:
  The problem is with deallocators, it crashes in nsBufferHandle.h
  at line 381 and 398, even commenting out both deallocation
  it crashes in nsEventListenerManager.cpp

Currently trying to find a way to update a checkout to a specific date on a
branch ...

-- 
           Summary: [3.3.4 regression] miscompilation of mozilla-firefox
                    (deallocator problems?)
           Product: gcc
           Version: 3.3.4
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i486-linux
  GCC host triplet: i486-linux
GCC target triplet: i486-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug c++/14640] [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug c++/14640] [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-19 01:30 -------
We really need a simple testcase as running/building takes too long.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |3.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug c++/14640] [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-19 21:47 -------
The regression was introduced by this patch:

2004-03-12  Gabriel Dos Reis  <gdr@integrable-solutions.net>

      Backport:
      2004-01-12  Richard Henderson  <rth@redhat.com>
      PR opt/10776
      * typeck2.c (split_nonconstant_init_1, split_nonconstant_init): New.
      (store_init_value): Use it.
      * decl.c (check_initializer): Expect full initialization code
      from store_init_value.
      * init.c (expand_aggr_init_1): Likewise.
      * decl2.c (maybe_emit_vtables): Abort if runtime init needed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rth at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug c++/14640] [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gdr at integrable-solutions
                   |                            |dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3.4 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-19 21:57 -------
Most likely now the issue is in the middle-end doing some messed up with /u and 
RTX_UNCHANGING_P.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |optimization


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[3.3.4 regression]          |[3.3 regression]
                   |miscompilation of mozilla-  |miscompilation of mozilla-
                   |firefox (deallocator        |firefox (deallocator
                   |problems?)                  |problems?)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-28 07:53 -------
Created an attachment (id=6003)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6003&action=view)
preprocessed source


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-28 07:55 -------
Created an attachment (id=6004)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6004&action=view)
generated .s file using 3.3 CVS 20030427


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-28 07:58 -------
Created an attachment (id=6005)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6005&action=view)
generated .s file using 3.3 CVS 20040327 with fix for PR10776 reversed


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-28 08:01 -------
Created an attachment (id=6006)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6006&action=view)
diff of .s files


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-28 08:09 -------
compiling the whole app with 3.3 CVS 20040327 results in the segfault. compiling
content/events/src/nsEventListenerManager.cpp with the same compiler and the
backport for PR10776 reverted and relinking results in a working application.

Flags used to compile:
/usr/lib/gcc-lib/i486-linux/3.3.3/cc1plus -fpreprocessed
nsEventListenerManager.ii -quiet -dumpbase nsEventListenerManager.cpp
-auxbase-strip nsEventListenerManager.o -O2 -Wall -Wconversion -Wpointer-arith
-Wcast-align -Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy -Wno-long-long
-w -version -fPIC -fno-rtti -fno-exceptions -fshort-wchar -o
nsEventListenerManager.s


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3 regression] miscompilation of mozilla-firefox (deallocator problems?)

[trentalg at aston dot ac dot uk]

------- Additional Comments From trentalg at aston dot ac dot uk  2004-03-29 16:09 -------
I confirm the same problem when building Mozilla 1.7 (CVS) using gcc 3.4.0
2004-03-29 (CVS).

The problem disappears after reverting the backport for PR10776 and re-building
Mozilla.

Unfortunately, this bug appears still unassigned.... maybe I'll file a new bug
report specifically for gcc3.4.0

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |trentalg at aston dot ac dot
                   |                            |uk


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-29 16:29 -------
We just did not know if this was also a 3.4 (or 3.5) regression at all, please do NOT file another bug.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[3.3 regression]            |[3.3/3.4/3.5 regression]
                   |miscompilation of mozilla-  |miscompilation of mozilla-
                   |firefox (deallocator        |firefox (deallocator
                   |problems?)                  |problems?)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-03-29 16:33 -------
Gaby: are you aware of this regression on the 3.3 branch due to a   
backported patch? We could avoid this is we undo the regression  
by reverting the backport and simply stick with the breakage  
of PR 10776.  
  
Debian maintainers: I think this PR is enough in itself, we don't gain  
by opening more bug reports about the same problem. However, you could  
aid us some more by identifying which part of the file you named is  
miscompiled. For this you'd split up the file into multiple files that each  
have only one function, and do the same procedure you had for identifying  
which of the original files was the problem on the new one-function-only  
files.  
  
Thanks  
  Wolfgang  

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-29 16:37 -------
*** Bug 14772 has been marked as a duplicate of this bug. ***

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[trentalg at aston dot ac dot uk]

------- Additional Comments From trentalg at aston dot ac dot uk  2004-03-29 16:40 -------
Andrew, I already submitted another bug and then got your reply.... sorry.

Anyway, the application are different, although the behaviour is similar: this
bug is about compiling Firefox while the new one I opened is about compiling the
standard Mozilla browser. Actually, I haven't tried to compile Firefox.

Maybe we'd better keep them separate. What do you say ?

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-29 18:32 -------
Since firefox and mozilla are so close in that they share so many files, the bug is the same as the same 
file exhibits the bug in both applications as they are very closely related programs.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[1319 at bot dot ru]

------- Additional Comments From 1319 at bot dot ru  2004-03-29 21:52 -------
Why this bug is still UNCONFIRMED? I cannot compile mozilla using 3.3.4 20040328
too.  Also 3.4.0 never compiles working mozilla (I tried many times from early
2004).

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-03-29 22:33 -------
Uncomfirmed here only means that we have no small testcase, which is one 
of our requirements to put something into "confirmed" mode. It is  
certainly on our radar! 
 
W. 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[gdr at integrable-solutions dot net]

------- Additional Comments From gdr at integrable-solutions dot net  2004-03-30 15:53 -------
Subject: Re:  [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

"bangerth at dealii dot org" <gcc-bugzilla@gcc.gnu.org> writes:

| Gaby: are you aware of this regression on the 3.3 branch due to a   
| backported patch?

Yes, I got two copies of each message since I'm added to the CC list
(and no, don't remove me :-)).  However, I disagree with your
conclusion as you stated below and phrased on gcc@gcc.gnu.org

| We could avoid this is we undo the regression  
| by reverting the backport and simply stick with the breakage  
| of PR 10776.  

I suppose that is one way of closing this PR.  The original patch 
was to solve a problem.  Reverting the patch will not solve it; it
would just hide this problem and unsolve the other one.  I would
prefer digging up and find ways to solve the regression.  
Reverting this patch would be the case only if there is no way to
get rid of this problem.  For what it worths, this problem
also affects 3.4.0 and (I think 3.5.0).

Thanks for your inputs and monitoring the PR.

-- Gaby


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-01 01:39 -------
Reduced testcase is in bug 14804 so closing as a dup.

*** This bug has been marked as a duplicate of 14804 ***

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640

[Bug optimization/14640] [3.3/3.4/3.5 regression] miscompilation of mozilla-firefox (deallocator problems?)

[trentalg at aston dot ac dot uk]

------- Additional Comments From trentalg at aston dot ac dot uk  2004-04-02 09:55 -------
I still get problems with the CVS prerelease of 3.4.0.

Could somebody please check that they also fixed the issue in such branch ?

Cheers.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14640