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[Herbert Thielen <ubuntu-launchpad@xxxxxxxxxxxxxxx>]

Public bug reported:

Sporadically (sometimes nearly always) thunderbird consumes 100% CPU
when I try to close the program.

Investigation with ltrace shows an infinite sequence of these calls:

pthread_mutex_unlock(0x7fd8786d9040, 0x7fd8786d9670, 0x40000000, 13) = 0
pthread_mutex_lock(0x7fd8786d9040, 177, 0, 0x2f7e) = 0
pthread_mutex_unlock(0x7fd8786d9040, 0, 8192, 13) = 0
pthread_mutex_lock(0x7fd8786d9040, 184, 0, 3)    = 0
pthread_mutex_unlock(0x7fd8786d9040, 0x7fd8786d9670, 0x40000000, 13) = 0
pthread_mutex_lock(0x7fd8786d9040, 177, 0, 0x2f7e) = 0
pthread_mutex_unlock(0x7fd8786d9040, 0, 8192, 13) = 0
pthread_mutex_lock(0x7fd8786d9040, 184, 0, 3)    = 0

Then I have to abort thunderbird with 'kill -TERM'.

I'm running thunderbird 1:31.8.0+build1-0ubuntu0.14.04.1 on Ubuntu
14.04.2 LTS (trusty) on a x86_64 (Core2 Duo) system.

Disabling all extensions didn't help (but somtimes changed the behaviour
for a number of starts/stops - different timing?).

** Affects: thunderbird (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1479059

Title:
  sporadic livelock blocks quitting thunderbird

Status in thunderbird package in Ubuntu:
  New

Bug description:
  Sporadically (sometimes nearly always) thunderbird consumes 100% CPU
  when I try to close the program.

  Investigation with ltrace shows an infinite sequence of these calls:

  pthread_mutex_unlock(0x7fd8786d9040, 0x7fd8786d9670, 0x40000000, 13) = 0
  pthread_mutex_lock(0x7fd8786d9040, 177, 0, 0x2f7e) = 0
  pthread_mutex_unlock(0x7fd8786d9040, 0, 8192, 13) = 0
  pthread_mutex_lock(0x7fd8786d9040, 184, 0, 3)    = 0
  pthread_mutex_unlock(0x7fd8786d9040, 0x7fd8786d9670, 0x40000000, 13) = 0
  pthread_mutex_lock(0x7fd8786d9040, 177, 0, 0x2f7e) = 0
  pthread_mutex_unlock(0x7fd8786d9040, 0, 8192, 13) = 0
  pthread_mutex_lock(0x7fd8786d9040, 184, 0, 3)    = 0

  Then I have to abort thunderbird with 'kill -TERM'.

  I'm running thunderbird 1:31.8.0+build1-0ubuntu0.14.04.1 on Ubuntu
  14.04.2 LTS (trusty) on a x86_64 (Core2 Duo) system.

  Disabling all extensions didn't help (but somtimes changed the
  behaviour for a number of starts/stops - different timing?).

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