[Bug 1749957] Re: Unity FTBFS in Bionic

[Timo Aaltonen]

** Changed in: libglvnd (Ubuntu)
   Status: New => Invalid

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Title:
  Unity FTBFS in Bionic

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Launchpad Bug Tracker]

This bug was fixed in the package unity -
7.5.0+18.04.20180221.1-0ubuntu1

---
unity (7.5.0+18.04.20180221.1-0ubuntu1) bionic; urgency=medium

  * Unity use track_obj to safely connect to UScreen and Settings
signals (LP: #1748330) (LP: #1748330)
  * CairoBaseWindow: don't try to compute the blur of an invalid texture
(LP: #1290056)
  * Unity: use new definition of infinite CompRegion's (LP: #1749957)

 -- Marco Trevisan (Treviño)   Wed, 21 Feb 2018 15:27:45
+

** Changed in: unity (Ubuntu)
   Status: Fix Committed => Fix Released

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Title:
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[Bug 1749957] Re: Unity FTBFS in Bionic

[Jeremy Bicha]

https://launchpad.net/ubuntu/+source/unity/7.5.0+18.04.20180221.1-0ubuntu1

** Changed in: unity (Ubuntu)
   Status: Confirmed => Fix Committed

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Treviño]

** Branch unlinked: lp:~3v1n0/unity/blurring-crash-fix

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Launchpad Bug Tracker]

** Branch linked: lp:~3v1n0/unity/blurring-crash-fix

** Branch linked: lp:~3v1n0/unity/use-new-compregion

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Treviño]

Ok, actually it's something else... Bug this was caused by memory
corruption as I was guessing.

See https://code.launchpad.net/~3v1n0/compiz/static-compregion-memory-
curruption-fix/+merge/338342 and bug #1750619

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Launchpad Bug Tracker]

** Branch linked: lp:~3v1n0/compiz/static-compregion-memory-curruption-
fix

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Treviño]

To fix that issue you only need to recompile compiz too. And that's
enough.

However, then the tests fail because of a crash inside libglvnd at exit:

#0  0x73e0c11b in malloc_consolidate (av=av@entry=0x7415dc20 
) at malloc.c:4492
#1  0x73e0de08 in _int_free (av=0x7415dc20 , 
p=, have_lock=0) at malloc.c:4398
#2  0x73e1244e in __GI___libc_free (mem=) at 
malloc.c:3145
#3  0x7fffed5102dd in __glDispatchDestroyTable (dispatch=0x558d63c0) at 
GLdispatch.c:321
#4  0x7fffed5df10f in CleanupVendorNameEntry (unused=0x0, 
pEntry=0x55944210) at libglxmapping.c:311
#5  0x7fffed5e8866 in __glXMappingTeardown (doReset=0) at 
libglxmapping.c:1061
#6  0x7fffed5dec80 in __glXFini () at libglx.c:2099
#7  0x77de621a in _dl_fini () at dl-fini.c:235
#8  0x73dbeec0 in __run_exit_handlers (status=0, listp=0x7415d6f8 
<__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, 
run_dtors=run_dtors@entry=true) at exit.c:83
#9  0x73dbef1a in __GI_exit (status=) at exit.c:105
#10 0x73da41c8 in __libc_start_main (main=
0x556b9d45 , argc=1, argv=0x7fffd128, 
init=, fini=, rtld_fini=, 
stack_end=0x7fffd118) at ../csu/libc-start.c:342
#11 0x5568908a in _start ()
(gdb) f 3
#3  0x7fffed5102dd in __glDispatchDestroyTable (dispatch=0x558d63c0) at 
GLdispatch.c:321
321 free(dispatch->table);
(gdb) 

In fact when the nux windowthread is closed, and its graphic display is
free'd we do a call to glXDestroyContext which leads to this crash
because for some reason the dispatch->table is already free'd by
something else (the driver?).

Getting rid of that line fixes the issue, but indeed isn't correct.

There's a comment on __glDispatchDestroyTable saying
/*
 * XXX: Technically, dispatch->currentThreads should be 0 if we're calling
 * into this function, but buggy apps may unload libGLX without losing
 * current, in which case this won't be true when the dispatch table
 * is destroyed.
 */

Not sure if this is the case though, as it's quite cryptic to me.

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Treviño]

** Also affects: libglvnd (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Khurshid Alam]

>From log:

CMake Error at plugins/unityshell/CMakeLists.txt:1 (find_package):
  By not providing "FindCompiz.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Compiz", but
  CMake did not find one.

  Could not find a package configuration file provided by "Compiz" with any
  of the following names:

CompizConfig.cmake
compiz-config.cmake

  Add the installation prefix of "Compiz" to CMAKE_PREFIX_PATH or set
  "Compiz_DIR" to a directory containing one of the above files.  If "Compiz"
  provides a separate development package or SDK, be sure it has been
  installed.

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Jeremy Bicha]

Khurshid, I just rebuilt Marco's branch and it FTBFS, but at a different
spot I believe.

See the PPA linked to from https://bileto.ubuntu.com/#/ticket/3138

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Khurshid Alam]

@Jeremy

I tried Marco's branch. It is compiling for me with glib2.0
2.55.2-1ubuntu1.

https://code.launchpad.net/~3v1n0/unity/track-more-objects

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Khurshid Alam]

Yes, it compiles with gnome-desktop3 3.27.90 but not with glib2.0
2.55.2-1ubuntu1 from bionic proposed.

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[Bug 1749957] Re: Unity FTBFS in Bionic

[Doug McMahon]

Local build here breaks on the new glib (tests only

** Changed in: unity (Ubuntu)
   Status: New => Confirmed

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