skype Segmentation fault (core dumped)

dmgus · 06-17-2014, 11:36 AM

I have "Segmentation fault (core dumped)" fault error when trying to start skype on 64-bit Arch.

There are quite some threads with solutions, mainly it is stated that for new versions of libs all should be fine:

https://bbs.archlinux.org/viewtopic.php?id=161303
https://bbs.archlinux.org/viewtopic.php?id=154571
https://bugs.archlinux.org/task/34630
https://bugs.archlinux.org/task/33417

I even created my own thread on the Arch forum but don't have an answer.
https://bbs.archlinux.org/viewtopic....24992#p1424992

I have the following versions of the libs:

skype version 4.2.0.13-4
lib32-glib2 version 2.40.0-1
qtwebkit version 2.3.3-1

I tried to downgrade the following libs for no avail: glib2, lib32-glib2, qt4, skype

And here is the output of gdb:

gdb /usr/lib32/skype/skype

run

Code:

Program received signal SIGSEGV, Segmentation fault.
0xf7fe495a in _dl_relocate_object () from /lib/ld-linux.so.2
    warning: Could not load shared library symbols for linux-gate.so.1.
    Do you need "set solib-search-path" or "set sysroot"?
    [Thread debugging using libthread_db enabled]
    Using host libthread_db library "/usr/lib/libthread_db.so.1".

    Program received signal SIGSEGV, Segmentation fault.
    0xf7fe495a in _dl_relocate_object () from /lib/ld-linux.so.2

backtrace

Code:

#0  0xf7fe495a in _dl_relocate_object () from /lib/ld-linux.so.2
#1  0xf7fecd51 in dl_open_worker () from /lib/ld-linux.so.2
#2  0xf7fe89d5 in _dl_catch_error () from /lib/ld-linux.so.2
#3  0xf7fec499 in _dl_open () from /lib/ld-linux.so.2
#4  0xf7e89ca5 in ?? () from /usr/lib32/libdl.so.2
#5  0xf7fe89d5 in _dl_catch_error () from /lib/ld-linux.so.2
#6  0xf7e8a351 in ?? () from /usr/lib32/libdl.so.2
#7  0xf7e89d4e in dlopen () from /usr/lib32/libdl.so.2
#8  0xf58ed464 in ?? () from /usr/lib32/libQtCore.so.4
#9  0xf58e7dd4 in ?? () from /usr/lib32/libQtCore.so.4
#10 0xf584760e in ?? () from /usr/lib32/libQtCore.so.4
#11 0xf580a19b in QLocalePrivate::updateSystemPrivate() ()
   from /usr/lib32/libQtCore.so.4
#12 0xf580a4c4 in ?? () from /usr/lib32/libQtCore.so.4
#13 0xf580a535 in QLocale::QLocale() () from /usr/lib32/libQtCore.so.4
#14 0xf58a2097 in ?? () from /usr/lib32/libQtCore.so.4
#15 0xf58ce954 in ?? () from /usr/lib32/libQtCore.so.4
#16 0xf58ceac2 in ?? () from /usr/lib32/libQtCore.so.4
#17 0xf587f0e0 in QFileInfo::QFileInfo(QString const&) ()
   from /usr/lib32/libQtCore.so.4
#18 0xf5879325 in QFile::exists(QString const&) ()
   from /usr/lib32/libQtCore.so.4
#19 0xf57df058 in ?? () from /usr/lib32/libQtCore.so.4

What should I try to fix it? Unfortunately I badly need that microsoft tool

business_kid · 06-19-2014, 03:54 AM

There's often some stupid symlink missing for ld-linux.so. Here's mine

Quote:

lrwxrwxrwx 1 root root 10 Dec 18 2012 /lib/ld-linux.so.2 -> ld-2.15.so
lrwxrwxrwx 1 root root 10 Dec 18 2012 /lib64/ld-linux-x86-64.so.2 -> ld-2.15.so

Run ldconfig and it will create any further symlinks it requires

dmgus · 06-22-2014, 07:01 AM

ldconfig ld-linux.so gave me the following

Code:

	ld-linux-x86-64.so.2 -> ld-2.19.so
	ld-linux.so.2 -> ld-2.19.so

running ldconfig won't help, what else can I try?

business_kid · 06-22-2014, 09:18 AM

Try

Code:

ldd  /path/to/skype  |  grep found

This checks the existence of dynamic executables and returns not found for any missing ones. Fix them.

If there are not any missing libs, try

Code:

ldd  /path/to/skype  | less

as I found some things pick up a lib from seamonkey, or google earth or something like that that has strange effects. That can often cause issues.

dmgus · 06-22-2014, 04:35 PM

The first command returns nothing, i.e. I have no missing libs, the second one returned some list, though cannot decide what is suspicious there:

Code:

	linux-gate.so.1 (0xf54c1000)
	libXv.so.1 => /usr/lib32/libXv.so.1 (0xf545b000)
	libXss.so.1 => /usr/lib32/libXss.so.1 (0xf5457000)
	librt.so.1 => /usr/lib32/librt.so.1 (0xf544e000)
	libdl.so.2 => /usr/lib32/libdl.so.2 (0xf5449000)
	libX11.so.6 => /usr/lib32/libX11.so.6 (0xf5311000)
	libXext.so.6 => /usr/lib32/libXext.so.6 (0xf52fe000)
	libQtDBus.so.4 => /usr/lib32/libQtDBus.so.4 (0xf5281000)
	libQtWebKit.so.4 => /usr/lib32/libQtWebKit.so.4 (0xf3c4f000)
	libQtXml.so.4 => /usr/lib32/libQtXml.so.4 (0xf3c0c000)
	libQtGui.so.4 => /usr/lib32/libQtGui.so.4 (0xf3168000)
	libQtNetwork.so.4 => /usr/lib32/libQtNetwork.so.4 (0xf3028000)
	libQtCore.so.4 => /usr/lib32/libQtCore.so.4 (0xf2d41000)
	libpthread.so.0 => /usr/lib32/libpthread.so.0 (0xf2d24000)
	libstdc++.so.6 => /usr/lib32/libstdc++.so.6 (0xf2c2e000)
	libm.so.6 => /usr/lib32/libm.so.6 (0xf2be1000)
	libgcc_s.so.1 => /usr/lib32/libgcc_s.so.1 (0xf2bc6000)
	libc.so.6 => /usr/lib32/libc.so.6 (0xf2a04000)
	/lib/ld-linux.so.2 (0xf54a0000)
	libxcb.so.1 => /usr/lib32/libxcb.so.1 (0xf29e0000)
	libdbus-1.so.3 => /usr/lib32/libdbus-1.so.3 (0xf298a000)
	libsqlite3.so.0 => /usr/lib32/libsqlite3.so.0 (0xf28b6000)
	libXrender.so.1 => /usr/lib32/libXrender.so.1 (0xf28ab000)
	libglib-2.0.so.0 => /usr/lib32/libglib-2.0.so.0 (0xf27a0000)
	libpng16.so.16 => /usr/lib32/libpng16.so.16 (0xf2767000)
	libz.so.1 => /usr/lib32/libz.so.1 (0xf2750000)
	libfreetype.so.6 => /usr/lib32/libfreetype.so.6 (0xf26ab000)
	libgobject-2.0.so.0 => /usr/lib32/libgobject-2.0.so.0 (0xf265a000)
	libSM.so.6 => /usr/lib32/libSM.so.6 (0xf2651000)
	libICE.so.6 => /usr/lib32/libICE.so.6 (0xf2634000)
	libfontconfig.so.1 => /usr/lib32/libfontconfig.so.1 (0xf25f8000)
	libssl.so.1.0.0 => /usr/lib32/libssl.so.1.0.0 (0xf2588000)
	libcrypto.so.1.0.0 => /usr/lib32/libcrypto.so.1.0.0 (0xf2392000)
	libXau.so.6 => /usr/lib32/libXau.so.6 (0xf238e000)
	libXdmcp.so.6 => /usr/lib32/libXdmcp.so.6 (0xf2387000)
	libpcre.so.1 => /usr/lib32/libpcre.so.1 (0xf2319000)
	libbz2.so.1.0 => /usr/lib32/libbz2.so.1.0 (0xf2308000)
	libharfbuzz.so.0 => /usr/lib32/libharfbuzz.so.0 (0xf22ae000)
	libffi.so.6 => /usr/lib32/libffi.so.6 (0xf22a6000)
	libuuid.so.1 => /usr/lib32/libuuid.so.1 (0xf22a0000)
	libexpat.so.1 => /usr/lib32/libexpat.so.1 (0xf2277000)

I've also tryed to downgrade lib32-glibc 2.19 for no avail.

business_kid · 06-23-2014, 02:50 AM

And no clues from purely debian sources? My skype has 4 more libs after libexpat - here's the list.

Quote:

libexpat.so.1 => /usr/lib/libexpat.so.1 (0xf4323000)
libffi.so.6 => /usr/lib/libffi.so.6 (0xf431d000)
libresolv.so.2 => /lib/libresolv.so.2 (0xf4304000)
liblzma.so.5 => /lib/liblzma.so.5 (0xf42de000)
libuuid.so.1 => /lib/libuuid.so.1 (0xf42da000)

You seem to have libuuid and libffi but I don't see libresolv or liblzma. I have skype-4.1. If you have 4.1, there's a fair chance your binary is borked.
There is also a debian specific crash issue in the README in /usr/share/skype, and I'd look at that.

dmgus · 06-23-2014, 08:44 AM

Yes these two seems not in my list, though I have Skype 4.2 on Arch 64bit and also tried 4.3 for the same result.

I have both libresolv and libuuid in lib32:

Code:

/usr/lib32/libresolv-2.19.so  
/usr/lib32/libresolv.so.2
/usr/lib32/libresolv.so

/usr/lib32/libuuid.so.1  
/usr/lib32/libuuid.so.1.3.0

So maybe I should make skype to use them somehow or something else?

dmgus · 06-23-2014, 08:55 AM

oh I tried to say I have both libresolv and liblzma:

Code:

/usr/lib32/liblzma.a   
/usr/lib32/liblzma.so.5
/usr/lib32/liblzma.so  
/usr/lib32/liblzma.so.5.0.5

business_kid · 06-23-2014, 10:54 AM

Skype has a debian specific issue in the README. The difference those libs make is that they cast suspicion on the binary?

Have you grabbed the static binary? or tried another download?

dmgus · 06-24-2014, 09:18 AM

Quote:

Originally Posted by business_kid

Skype has a debian specific issue in the README. The difference those libs make is that they cast suspicion on the binary?

Have you grabbed the static binary? or tried another download?

First of all I tried the standard skype which I get from Arch repo, it was 4.2 now it's upgraded to 4.3 and still the same fault. Moreover I tried Skype 2.0 from Arch AUR - also segfault. I tried also to download dynamic version from skype.com skype-4.3.0.37.tar.bz2 This version provides the same segfault

Not sure if I got your question right regarding static binary, if not please advise what can I try as well. Thanks!

business_kid · 06-25-2014, 03:25 AM

Dynamic versions are preferred, but need the external libraries.

Static versions are bigger, but have what they need built in. There used to be a static version, but m$ have pulled it :-(. There is some lib AWOL or borked and that is crashing out skype, at a guess.
Have you this stuff (All skype dependencies)

Skype for Linux

1 GHz processor or faster.
256 MB RAM.
100 MB free disk space on your hard drive.
Video card driver with Xv support.
Either a built-in or external microphone is required for voice calls.
An internet connection - broadband is best (GPRS is not supported for voice calls).
Qt 4.7
D-Bus 1.0.0

Other than that, I am out of ideas.

dmgus · 06-25-2014, 02:50 PM

Thanks a lot for your help business_kid! At least I've found a workaround - static skype 2

I got it from

http://download.skype.com/linux/skyp...2.0.35.tar.bz2

and it works fine on my end. So could go with skype now at least

I've also tried static 4.0.0.8 for no avail:

http://download.skype.com/linux/skyp....0.0.8.tar.bz2

Code:

warning: Could not load shared library symbols for linux-gate.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program received signal SIGILL, Illegal instruction.
0x0805bb97 in malloc@plt ()
(gdb) backtrace
#0  0x0805bb97 in malloc@plt ()
#1  0x00002000 in ?? ()
#2  0xf7a8bcb3 in g_malloc () from /usr/lib32/libglib-2.0.so.0
#3  0xf7a8bf7b in g_malloc_n () from /usr/lib32/libglib-2.0.so.0
#4  0xf7a95d67 in g_quark_from_static_string () from /usr/lib32/libglib-2.0.so.0
#5  0xf7dd7892 in ?? () from /usr/lib32/libgobject-2.0.so.0
#6  0xf7fe8b30 in call_init.part () from /lib/ld-linux.so.2
#7  0xf7fe8c40 in _dl_init_internal () from /lib/ld-linux.so.2
#8  0xf7fdabaf in _dl_start_user () from /lib/ld-linux.so.2

ldd won't show any not found libs.

business_kid · 06-26-2014, 03:32 AM

That seems like it's not finding the basic libs. Something weird happened.

setting solib-search-path is a gdb instruction, and sysroot is a gcc one. I wouldn't bother with those. But it implies a difficulty with basic libs. Are you sandboxing it, or something?

With static, ldd is out of it. I don't know if your 4.0.0.8 version is intact. Glad you're going. Does anything else act up?

dmgus · 06-27-2014, 12:46 PM

Not sure what do you mean by sandboxing, probably not, since I don't know what do you mean and haven't done anything special...
4.0.0.8 is from skype.com so should be a correct one.
Regarding anything else, no everything works just fine, except bumblebee, it has some problems though not sure if it relates.

business_kid · 06-28-2014, 03:50 AM

sandboxing is a security technique. If you don't know about it, you're probably not doing it.