I've got 19 crash logs from today.  They fall into 3 categories.  First is the 
SEGV crash, for which logs have already been included.  This type are 4/18 
crashes for me.

Second is the ref_count error.  13/19.  This logs look like:
---8<---
[209380:209380:1222/122417.041984:ERROR:gl_implementation.cc(282)] Failed to 
load /usr/lib/chromium/libGLESv2.so: /usr/lib/chromium/libGLESv2.so: cannot 
open shared object file: No such file or directory
[209380:209380:1222/122417.043575:ERROR:viz_main_impl.cc(150)] Exiting GPU 
process due to errors during initialization
Fontconfig error: Cannot load default config file
[209305:209305:1222/122920.888661:FATAL:ref_counted.cc(66)] Check failed: --
ref_count_ != std::numeric_limits<decltype(ref_count_)>::max(). 
#0 0x555648e5eca9 (/usr/lib/chromium/chromium+0x542fca8)
#1 0x555648dd3623 (/usr/lib/chromium/chromium+0x53a4622)
#2 0x555648de4ad1 (/usr/lib/chromium/chromium+0x53b5ad0)
#3 0x555648de524e (/usr/lib/chromium/chromium+0x53b624d)
#4 0x555648de6c4a (/usr/lib/chromium/chromium+0x53b7c49)
#5 0x5556477db78b (/usr/lib/chromium/chromium+0x3dac78a)
#6 0x5556477db7ce (/usr/lib/chromium/chromium+0x3dac7cd)
#7 0x555646cfcca7 (/usr/lib/chromium/chromium+0x32cdca6)
#8 0x5556477847c3 (/usr/lib/chromium/chromium+0x3d557c2)
#9 0x5556477bad99 (/usr/lib/chromium/chromium+0x3d8bd98)
#10 0x55564780a921 (/usr/lib/chromium/chromium+0x3ddb920)
#11 0x55564780abde (/usr/lib/chromium/chromium+0x3ddbbdd)
#12 0x5556477d7847 (/usr/lib/chromium/chromium+0x3da8846)
#13 0x5556477d789e (/usr/lib/chromium/chromium+0x3da889d)
#14 0x5556477db7a0 (/usr/lib/chromium/chromium+0x3dac79f)
#15 0x5556477db7ce (/usr/lib/chromium/chromium+0x3dac7cd)
#16 0x555646cfcca7 (/usr/lib/chromium/chromium+0x32cdca6)
#17 0x555647073403 (/usr/lib/chromium/chromium+0x3644402)
#18 0x555647411e3c (/usr/lib/chromium/chromium+0x39e2e3b)
#19 0x5556493eef9f (/usr/lib/chromium/chromium+0x59bff9e)
#20 0x5556493f55a7 (/usr/lib/chromium/chromium+0x59c65a6)
#21 0x5556493f38b9 (/usr/lib/chromium/chromium+0x59c48b8)
#22 0x5556493f270e (/usr/lib/chromium/chromium+0x59c370d)
#23 0x5556493ec128 (/usr/lib/chromium/chromium+0x59bd127)
#24 0x555649405ebe (/usr/lib/chromium/chromium+0x59d6ebd)
#25 0x555649406336 (/usr/lib/chromium/chromium+0x59d7335)
#26 0x555648e247d4 (/usr/lib/chromium/chromium+0x53f57d3)
#27 0x555648e34aa9 (/usr/lib/chromium/chromium+0x5405aa8)
#28 0x555648e347ac (/usr/lib/chromium/chromium+0x54057ab)
#29 0x555648de8ab7 (/usr/lib/chromium/chromium+0x53b9ab6)
#30 0x7f1f3756abdb g_main_context_dispatch
#31 0x7f1f3756ae88 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.3+0x51e87)
#32 0x7f1f3756af3f g_main_context_iteration
#33 0x555648de88c2 (/usr/lib/chromium/chromium+0x53b98c1)
#34 0x555648e3510d (/usr/lib/chromium/chromium+0x540610c)
#35 0x555648e0b1a0 (/usr/lib/chromium/chromium+0x53dc19f)
#36 0x555648fc064c (/usr/lib/chromium/chromium+0x559164b)
#37 0x5556473a68a2 (/usr/lib/chromium/chromium+0x39778a1)
#38 0x5556473a8842 (/usr/lib/chromium/chromium+0x3979841)
#39 0x5556473a37dd (/usr/lib/chromium/chromium+0x39747dc)
#40 0x555648dae491 (/usr/lib/chromium/chromium+0x537f490)
#41 0x555648dae0c4 (/usr/lib/chromium/chromium+0x537f0c3)
#42 0x555648daba4b (/usr/lib/chromium/chromium+0x537ca4a)
#43 0x555648dac32e (/usr/lib/chromium/chromium+0x537d32d)
#44 0x5556466d2c13 ChromeMain
#45 0x7f1f32f8bd0a __libc_start_main
#46 0x5556466d2aaa _start
Task trace:
#0 0x5556494061b5 (/usr/lib/chromium/chromium+0x59d71b4)

Received signal 6
#0 0x555648e5eca9 (/usr/lib/chromium/chromium+0x542fca8)
#1 0x555648dd3623 (/usr/lib/chromium/chromium+0x53a4622)
#2 0x555648e5e88b (/usr/lib/chromium/chromium+0x542f88a)
#3 0x7f1f376b6140 (/lib/x86_64-linux-gnu/libpthread-2.31.so+0x1413f)
#4 0x7f1f32fa0c81 gsignal
#5 0x7f1f32f8a537 abort
#6 0x555648e5d805 (/usr/lib/chromium/chromium+0x542e804)
#7 0x555648de4ed6 (/usr/lib/chromium/chromium+0x53b5ed5)
#8 0x555648de524e (/usr/lib/chromium/chromium+0x53b624d)
#9 0x555648de6c4a (/usr/lib/chromium/chromium+0x53b7c49)
#10 0x5556477db78b (/usr/lib/chromium/chromium+0x3dac78a)
#11 0x5556477db7ce (/usr/lib/chromium/chromium+0x3dac7cd)
#12 0x555646cfcca7 (/usr/lib/chromium/chromium+0x32cdca6)
#13 0x5556477847c3 (/usr/lib/chromium/chromium+0x3d557c2)
#14 0x5556477bad99 (/usr/lib/chromium/chromium+0x3d8bd98)
#15 0x55564780a921 (/usr/lib/chromium/chromium+0x3ddb920)
#16 0x55564780abde (/usr/lib/chromium/chromium+0x3ddbbdd)
#17 0x5556477d7847 (/usr/lib/chromium/chromium+0x3da8846)
#18 0x5556477d789e (/usr/lib/chromium/chromium+0x3da889d)
#19 0x5556477db7a0 (/usr/lib/chromium/chromium+0x3dac79f)
#20 0x5556477db7ce (/usr/lib/chromium/chromium+0x3dac7cd)
#21 0x555646cfcca7 (/usr/lib/chromium/chromium+0x32cdca6)
#22 0x555647073403 (/usr/lib/chromium/chromium+0x3644402)
#23 0x555647411e3c (/usr/lib/chromium/chromium+0x39e2e3b)
#24 0x5556493eef9f (/usr/lib/chromium/chromium+0x59bff9e)
#25 0x5556493f55a7 (/usr/lib/chromium/chromium+0x59c65a6)
#26 0x5556493f38b9 (/usr/lib/chromium/chromium+0x59c48b8)
#27 0x5556493f270e (/usr/lib/chromium/chromium+0x59c370d)
#28 0x5556493ec128 (/usr/lib/chromium/chromium+0x59bd127)
#29 0x555649405ebe (/usr/lib/chromium/chromium+0x59d6ebd)
#30 0x555649406336 (/usr/lib/chromium/chromium+0x59d7335)
#31 0x555648e247d4 (/usr/lib/chromium/chromium+0x53f57d3)
#32 0x555648e34aa9 (/usr/lib/chromium/chromium+0x5405aa8)
#33 0x555648e347ac (/usr/lib/chromium/chromium+0x54057ab)
#34 0x555648de8ab7 (/usr/lib/chromium/chromium+0x53b9ab6)
#35 0x7f1f3756abdb g_main_context_dispatch
#36 0x7f1f3756ae88 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.3+0x51e87)
#37 0x7f1f3756af3f g_main_context_iteration
#38 0x555648de88c2 (/usr/lib/chromium/chromium+0x53b98c1)
#39 0x555648e3510d (/usr/lib/chromium/chromium+0x540610c)
#40 0x555648e0b1a0 (/usr/lib/chromium/chromium+0x53dc19f)
#41 0x555648fc064c (/usr/lib/chromium/chromium+0x559164b)
#42 0x5556473a68a2 (/usr/lib/chromium/chromium+0x39778a1)
#43 0x5556473a8842 (/usr/lib/chromium/chromium+0x3979841)
#44 0x5556473a37dd (/usr/lib/chromium/chromium+0x39747dc)
#45 0x555648dae491 (/usr/lib/chromium/chromium+0x537f490)
#46 0x555648dae0c4 (/usr/lib/chromium/chromium+0x537f0c3)
#47 0x555648daba4b (/usr/lib/chromium/chromium+0x537ca4a)
#48 0x555648dac32e (/usr/lib/chromium/chromium+0x537d32d)
#49 0x5556466d2c13 ChromeMain
#50 0x7f1f32f8bd0a __libc_start_main
#51 0x5556466d2aaa _start
  r8: 0000000000000000  r9: 00007fffe3aa0eb0 r10: 0000000000000008 r11: 
0000000000000246
 r12: 000000000000008c r13: 0000555652392270 r14: 00007fffe3aa1960 r15: 
0000555652392280
  di: 0000000000000002  si: 00007fffe3aa0eb0  bp: 00007fffe3aa1100  bx: 
00007f1f2b755400
  dx: 0000000000000000  ax: 0000000000000000  cx: 00007f1f32fa0c81  sp: 
00007fffe3aa0eb0
  ip: 00007f1f32fa0c81 efl: 0000000000000246 cgf: 002b000000000033 erf: 
0000000000000000
 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]
Calling _exit(1). Core file will not be generated.
--->8---

Third is the "corrupted double-linked list" error.  2/19.  This logs look 
like:
---8<---
[3822303:3822303:1222/114908.501948:ERROR:gl_implementation.cc(282)] Failed to 
load /usr/lib/chromium/libGLESv2.so: /usr/lib/chromium/libGLESv2.so: cannot 
open shared object file: No such file or directory
[3822303:3822303:1222/114908.502978:ERROR:viz_main_impl.cc(150)] Exiting GPU 
process due to errors during initialization
Fontconfig error: Cannot load default config file
Fontconfig error: Cannot load default config file
corrupted double-linked list
Received signal 6
#0 0x5605cd880ca9 (/usr/lib/chromium/chromium+0x542fca8)
#1 0x5605cd7f5623 (/usr/lib/chromium/chromium+0x53a4622)
#2 0x5605cd88088b (/usr/lib/chromium/chromium+0x542f88a)
#3 0x7f1426905140 (/lib/x86_64-linux-gnu/libpthread-2.31.so+0x1413f)
#4 0x7f14221efc81 gsignal
#5 0x7f14221d9537 abort
#6 0x7f1422232708 (/lib/x86_64-linux-gnu/libc-2.31.so+0x7e707)
#7 0x7f14222399fa (/lib/x86_64-linux-gnu/libc-2.31.so+0x859f9)
#8 0x7f142223a72c (/lib/x86_64-linux-gnu/libc-2.31.so+0x8672b)
#9 0x7f142223a863 (/lib/x86_64-linux-gnu/libc-2.31.so+0x86862)
#10 0x7f142223c6f5 (/lib/x86_64-linux-gnu/libc-2.31.so+0x886f4)
#11 0x7f142223e239 __libc_malloc
#12 0x5605cd89879e operator new()
#13 0x7f14224c6cfc std::__cxx11::basic_string<>::reserve()
#14 0x7f14224bc768 std::__cxx11::basic_stringbuf<>::overflow()
#15 0x7f14224c531a std::basic_streambuf<>::xsputn()
#16 0x7f14224b79e4 std::__ostream_insert<>()
#17 0x5605cd880d79 (/usr/lib/chromium/chromium+0x542fd78)
#18 0x5605cd8810a4 (/usr/lib/chromium/chromium+0x54300a3)
#19 0x5605cd806b2c (/usr/lib/chromium/chromium+0x53b5b2b)
#20 0x5605cd80724e (/usr/lib/chromium/chromium+0x53b624d)
#21 0x5605cd808c4a (/usr/lib/chromium/chromium+0x53b7c49)
#22 0x5605cc1fd78b (/usr/lib/chromium/chromium+0x3dac78a)
#23 0x5605cc1fd7ce (/usr/lib/chromium/chromium+0x3dac7cd)
#24 0x5605cb71eca7 (/usr/lib/chromium/chromium+0x32cdca6)
#25 0x5605cc1a67c3 (/usr/lib/chromium/chromium+0x3d557c2)
#26 0x5605cc1dcd99 (/usr/lib/chromium/chromium+0x3d8bd98)
#27 0x5605cc22c921 (/usr/lib/chromium/chromium+0x3ddb920)
#28 0x5605cc22cbde (/usr/lib/chromium/chromium+0x3ddbbdd)
#29 0x5605cc1f9847 (/usr/lib/chromium/chromium+0x3da8846)
#30 0x5605cc1f989e (/usr/lib/chromium/chromium+0x3da889d)
#31 0x5605cc1fd7a0 (/usr/lib/chromium/chromium+0x3dac79f)
#32 0x5605cc1fd7ce (/usr/lib/chromium/chromium+0x3dac7cd)
#33 0x5605cb71eca7 (/usr/lib/chromium/chromium+0x32cdca6)
#34 0x5605cba95403 (/usr/lib/chromium/chromium+0x3644402)
#35 0x5605cbe33e3c (/usr/lib/chromium/chromium+0x39e2e3b)
#36 0x5605cde10f9f (/usr/lib/chromium/chromium+0x59bff9e)
#37 0x5605cde175a7 (/usr/lib/chromium/chromium+0x59c65a6)
#38 0x5605cde158b9 (/usr/lib/chromium/chromium+0x59c48b8)
#39 0x5605cde1470e (/usr/lib/chromium/chromium+0x59c370d)
#40 0x5605cde0e128 (/usr/lib/chromium/chromium+0x59bd127)
#41 0x5605cde27ebe (/usr/lib/chromium/chromium+0x59d6ebd)
#42 0x5605cde28336 (/usr/lib/chromium/chromium+0x59d7335)
#43 0x5605cd8467d4 (/usr/lib/chromium/chromium+0x53f57d3)
#44 0x5605cd856aa9 (/usr/lib/chromium/chromium+0x5405aa8)
#45 0x5605cd8567ac (/usr/lib/chromium/chromium+0x54057ab)
#46 0x5605cd80aab7 (/usr/lib/chromium/chromium+0x53b9ab6)
#47 0x7f14267b9bdb g_main_context_dispatch
#48 0x7f14267b9e88 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.3+0x51e87)
#49 0x7f14267b9f3f g_main_context_iteration
#50 0x5605cd80a8c2 (/usr/lib/chromium/chromium+0x53b98c1)
#51 0x5605cd85710d (/usr/lib/chromium/chromium+0x540610c)
#52 0x5605cd82d1a0 (/usr/lib/chromium/chromium+0x53dc19f)
#53 0x5605cd9e264c (/usr/lib/chromium/chromium+0x559164b)
#54 0x5605cbdc88a2 (/usr/lib/chromium/chromium+0x39778a1)
#55 0x5605cbdca842 (/usr/lib/chromium/chromium+0x3979841)
#56 0x5605cbdc57dd (/usr/lib/chromium/chromium+0x39747dc)
#57 0x5605cd7d0491 (/usr/lib/chromium/chromium+0x537f490)
#58 0x5605cd7d00c4 (/usr/lib/chromium/chromium+0x537f0c3)
#59 0x5605cd7cda4b (/usr/lib/chromium/chromium+0x537ca4a)
#60 0x5605cd7ce32e (/usr/lib/chromium/chromium+0x537d32d)
#61 0x5605cb0f4c13 ChromeMain
#62 0x7f14221dad0a __libc_start_main
#63 0x5605cb0f4aaa _start
  r8: 0000000000000000  r9: 00007ffd1cb59e10 r10: 0000000000000008 r11: 
0000000000000246
 r12: 00007ffd1cb5a080 r13: 0000000000001000 r14: 0000000000000010 r15: 
00007f1418000000
  di: 0000000000000002  si: 00007ffd1cb59e10  bp: 00007ffd1cb5a160  bx: 
00007f141a9a4400
  dx: 0000000000000000  ax: 0000000000000000  cx: 00007f14221efc81  sp: 
00007ffd1cb59e10
  ip: 00007f14221efc81 efl: 0000000000000246 cgf: 002b000000000033 erf: 
0000000000000000
 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]
Calling _exit(1). Core file will not be generated.
--->8---

Both of the snippets able are the direct output from chromium, after 
installing quite a few -dbg and -dbgsym packages.  If you can instruct me on 
how to get more informative diagnostics from Chromium, I will.

It's just general memory corruption, and reminds me a little of bug #964177, 
though there's no high CPU load, just the memory corruption crashes.
-- 
Boyd Stephen Smith Jr.                   ,= ,-_-. =.
b...@iguanasuicide.net                   ((_/)o o(\_))
ICQ: 514984 YM/AIM: DaTwinkDaddy         `-'(. .)`-'
http://iguanasuicide.net/                    \_/

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