Comment 2 for bug 1651025

output in terminal when launching steam:

Setting up Steam content in /home/etienne/.local/share/Steam
Running Steam on ubuntu 17.04 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(0)
Installing breakpad exception handler for appid(steam)/version(1.0)
Installing breakpad exception handler for appid(steam)/version(1.0)
Installing breakpad exception handler for appid(steam)/version(1.0)
Assert( Assertion Failed: Illegal termination of worker thread 'Thread(0x0x57b7d170/0x0xf4bd4b' ):threadtools.cpp:3283

Installing breakpad exception handler for appid(steam)/version(1.0)
assert_20161222223204_6.dmp[10637]: Uploading dump (out-of-process)
/tmp/dumps/assert_20161222223204_6.dmp
ILocalize::AddFile() failed to load file "public/steambootstrapper_english.txt".
[2016-12-22 22:32:00] Startup - updater built Nov 23 2016 01:05:42
[2016-12-22 22:32:00] Verifying installation...
[2016-12-22 22:32:00] Unable to read and verify install manifest /home/etienne/.local/share/Steam/package/steam_client_ubuntu12.installed
[2016-12-22 22:32:00] Verification complete
[2016-12-22 22:32:00] Downloading Update...
[2016-12-22 22:32:00] Checking for available update...
[2016-12-22 22:32:00] Download failed: http error 0 (client-download.steampowered.com/client/steam_client_ubuntu12)
[2016-12-22 22:32:01] Download failed: http error 0 (media.steampowered.com/client/steam_client_ubuntu12)
[2016-12-22 22:32:01] failed to load manifest from buffer.
[2016-12-22 22:32:01] Failed to load manifest
[2016-12-22 22:32:01] Error: Download failed: http error 0
[2016-12-22 22:32:01] Error: Steam needs to be online to update. Please confirm your network connection and try again.
[2016-12-22 22:32:03] Shutdown
threadtools.cpp (3283) : Assertion Failed: Illegal termination of worker thread 'Thread(0x0x57b7d170/0x0xf4bd4b'
/home/etienne/.local/share/Steam/steam.sh: line 444: no match: ssfn*
assert_20161222223204_6.dmp[10637]: Finished uploading minidump (out-of-process): success = yes
assert_20161222223204_6.dmp[10637]: response: CrashID=bp-8b93a4c5-80d0-4078-a614-0c37d2161222