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-[[!meta copyright="Copyright © 2011, 2013 Free Software Foundation, Inc."]]
-
-[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
-id="license" text="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
-is included in the section entitled [[GNU Free Documentation
-License|/fdl]]."]]"""]]
-
-[[!meta title="libpthread: __pthread_enqueue: Assertion `thread->prevp == 0'
-failed"]]
-
-[[!tag open_issue_libpthread]]
-
-
-# IRC, OFTC, #debian-hurd, 2011-10-21
-
-    [Python testsuite]
-    <pinotree> [169/340/1] test_logging
-    <pinotree> python:
-      /home/pino/sources/hurd/hurd-20110519/./libpthread/pthread/pt-internal.h:109:
-      __pthread_enqueue: Assertion `thread->prevp == 0' failed.
-    <pinotree> sigh
-
-
-## IRC, freenode, #hurd, 2011-10-21
-
-    <pinotree> am i missing anything, or in libpthread the __pthread_threads
-      list does not ever has elements removed from it?
-    <pinotree> ... thus potentially causing
-      "./libpthread/pthread/pt-internal.h:109: __pthread_enqueue: Assertion
-      `thread->prevp == 0' failed." because threads can be appended on
-      __pthread_dealloc() to the __pthread_free_threads list as well?
-    <pinotree> maybe reusing the same next+prevp pointers in the __pthread
-      struct for more than one list at the same time isn't a good idea...
-
-
-## IRC, freenode, #hurd, 2011-10-23
-
-    <youpi> pinotree: I don't understand the relation between thread->prevp !=
-      0 and the __pthread_threads list
-    <youpi> the list never has elements removed indeed, since libpthread never
-      frees __pthread structures apparently
-    <pinotree> youpi: ye sorry, that relation is indeed nonsense
-    <youpi> in which condition did you get prevp != 0
-    <pinotree> i wa trying to find some explaination for the "thread->prevp ==
-      0" assertion in the _queue function
-    <youpi> ?
-    <pinotree> *was
-    <youpi> it's not obvious to me how libpthread makes sure the various
-      cond/mutex/rwlock make sure that it's not queued several times
-    <pinotree> yeah
-    <pinotree> apparently prevp/next are used for lists of held
-      waitcond/mutex/rwlock and free threads
-
-
-# IRC, freenode, #hurd, 2013-03-20
-
-    <braunr> aw
-    <braunr> i hit the ext2fs.static: ./pthread/pt-internal.h:122:
-      __pthread_enqueue: Assertion `thread->prevp == 0' failed.
-    <braunr> assertion
-    <braunr> looks like there is a deadlock on assert
-    <braunr> which might explain why i never saw progress when i tested that in
-      the past
-
-
-## IRC, freenode, #hurd, 2013-04-21
-
-    <braunr> damn, there still bugs in libpthread
-    <braunr> (about prevp not being null when it should i mean)
-    <pinotree> braunr: found another trigger for that?
-    <braunr> no
-    <braunr> it's so random i wonder if it's not a completely unrelated
-      corruption
-    <braunr> pinotree: also, i'm having more of these issues with my custom
-      hurd packages that let threads exit after some time from managing ports
-    <braunr> (i removed the libports_stability patch)
-    <braunr> i once had this : http://www.sceen.net/~rbraun/darnassus_crash.png
-
-[The assertion failure.]
-
-
-## IRC, freenode, #hurd, 2013-04-23
-
-    <braunr> removing the libports_stability patch exposed bugs in libpthread,
-      triggering assertions when queueing/dequeue threads from a queue (but i
-      don't know which one / in which function)
-
-
-## IRC, freenode, #hurd, 2013-06-25
-
-    <pinotree> braunr:
-      https://buildd.debian.org/status/fetch.php?pkg=libmemcached&ver=1.0.17-2&arch=hurd-i386&stamp=1372165732
-    <pinotree> make: ./pthread/pt-internal.h:122: __pthread_enqueue: Assertion
-      `thread->prevp == 0' failed. \o/
-    <pinotree> (it should rather be /o\, but better pretend not)
-    <braunr> pinotree: yes, we regularly see it
-    <braunr> pinotree: how long has the machine been running at this point ?
-    <pinotree> dunno, you should ask samuel about that
-    <pinotree> does it happen after N hours/days?
-    <braunr> a few days of moderate to high activity yes
-    <pinotree> ah ok
-    <braunr> and i actually see this error much more often when i disable the
-      libports stability patch in the hurd debian package
-    <braunr> so i guess something is wrong with thread recycling
-    <braunr> but i wanted to completely rewrite that part with the new kernel
-      call i asked bddebian to work on :)