Now it segfaults again just like before. 'strace firefox' has this near the end:
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb73b4000
brk(0x8e70000) = 0x8e70000
brk(0x8ea0000) = 0x8ea0000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
$ free -m
total used free shared buffers cached
Mem: 1010 979 30 0 68 337
-/+ buffers/cache: 573 437
Swap: 488 55 432
Gnome panel resource monitor says "Memory: 50% in use by programs. 33%
in use as cache". Konqueror (thunderbird, evince...) runs fine, but
firefox won't start.
$ firefox -safe-mode
Segmentation fault
With safe mode, a blank window appears for about half a second. With
just 'firefox', no window is shown.
'strace firefox -safe-mode' has one less brk near the end, but looks really
similar.
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb7365000
brk(0x85e6000) = 0x85e6000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
Ubuntu bug #57454 looks a bit similar to this one.
--
Firefox Segmentation Fault Requires Reboot
https://launchpad.net/bugs/60236
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