[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

STINNER Victor added the comment: I looked at this old issue. First of all, "bug.py" filename is accurate: this program contains a bug, but it's non-obvious. * the main thread opens a file which gets the file descriptor 3 * a new thread is spawns which indirectly closes this file descriptor o

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Change by STINNER Victor : -- keywords: +patch pull_requests: +12713 stage: resolved -> patch review ___ Python tracker ___ ___ Pyth

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Zack Weinberg added the comment: I have observed this problem in a production application using Python 3.5 and 3.6 (system-packaged interpreters from Ubuntu) and I would like to mention that this is an effective workaround: ``` import ctypes libgcc_s = ctypes.CDLL("libgcc_s.so.1") ``` provi

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Barry Davis added the comment: I meant my cross compiled python, not my cross compiler. -- ___ Python tracker ___ ___ Python-bugs-list

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Barry Davis added the comment: Looks like I was mistaken. My cross compiler was trying to load libgcc_s.so.1 from the standard location and not liking the one it found. Fixed for now by setting LD_LIBRARY_PATH to point at the dir containing the right libgcc_s.so.1 -- versions: -Python

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Barry Davis added the comment: I think this is the same issue I'm getting. I'm hitting it when compiling python 3.6.2 compiled with gcc-4.8.4. This wasn't occasional, it was every time I tried. As a feeble workaround I was compiling in parallel, then in serial when it fails, although I'm now hit

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

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[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

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[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Charles-François Natali added the comment: > On Linux, you can try to set the LD_PRELOAD environment variable as a > workaround. > > LD_PRELOAD=libgcc_s.so.1 python bug.py > > You may need to specify the full path. I don't think that'll work. Despite its name, using LD_PRELOAD won't "preload" th

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Maries Ionel Cristian added the comment: Alright ... would it be a very big hack to preload libgcc in the thread module (at import time) ? There is platform specific code there anyway, it wouldn't be such a big deal would it? -- ___ Python tracker

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

STINNER Victor added the comment: 2013/8/18 Maries Ionel Cristian : > Well anyway, is there any way to preload libgcc ? Because in python2.x it > wasn't loaded at runtime. On Linux, you can try to set the LD_PRELOAD environment variable as a workaround. LD_PRELOAD=libgcc_s.so.1 python bug.py

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Maries Ionel Cristian added the comment: Well anyway, is there any way to preload libgcc ? Because in python2.x it wasn't loaded at runtime. -- ___ Python tracker ___ __

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

STINNER Victor added the comment: 2013/8/17 Maries Ionel Cristian : > I don't think it's that obscure ... uwsgi has this issue > https://www.google.com/search?q=libgcc_s.so.1+must+be+installed+for+pthread_cancel+to+work+uwsgi+site:lists.unbit.it- > they cause it probably different but the point i

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Maries Ionel Cristian added the comment: Correct link https://www.google.com/search?q=libgcc_s.so.1+must+be+installed+for+pthread_cancel+to+work+uwsgi+site:lists.unbit.it -- ___ Python tracker

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Maries Ionel Cristian added the comment: > What is the version of your libc library? Try something like "dpkg -l > libc6". > 2.15-0ubuntu10.4 I don't think it's that obscure ... uwsgi has this issue https://www.google.com/search?q=libgcc_s.so.1+must+be+installed+for+pthread_cancel+to+work+uwsg

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Charles-François Natali added the comment: > Perhaps the only thing we could do would be try to "preload" libgcc by > calling one of those APIs at startup? Yeah, I was thinking about doing this in PyThread_init_thread() but... > But I'm not sure it's a good idea to > add such a platform-specifi

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

STINNER Victor added the comment: Oh ok, I'm able to reproduce the issue with the system Python 3.3: $ while true; do echo "loop"; python3.3 bug.py || break; done loop ... loop libgcc_s.so.1 must be installed for pthread_cancel to work Abandon (core dumped) -- _

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

STINNER Victor added the comment: Maries Ionel Cristian> ubuntu 12.04.2 What is the version of your libc library? Try something like "dpkg -l libc6". -- Could this issue be related to this glibc issue? http://sourceware.org/bugzilla/show_bug.cgi?id=2644 I ran your script on Python 3.4 in a sh

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

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[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Antoine Pitrou added the comment: Perhaps the only thing we could do would be try to "preload" libgcc by calling one of those APIs at startup? But I'm not sure it's a good idea to add such a platform-specific hack (for what is arguably an obscure and rare issue). -- nosy: +pitrou statu

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

Charles-François Natali added the comment: Unfortunately, there's not much we can do about it: if dlsym() fails - which is the case here either because read() fails with EBADF, or because the file descriptor now points to another stream (i.e. not libgcc), the libc aborts (here upon pthread_exi

[issue18748] libgcc_s.so.1 must be installed for pthread_cancel to work

New submission from Maries Ionel Cristian: Running the file couple of times will make the interpreter fail with: libgcc_s.so.1 must be installed for pthread_cancel to work >From what I've seen it is triggered from PyThread_delete_key (tries to load >libgcc_s.so at that time). How does it happ