FS#49863 - [mythtv] backend now crashing after recent pacman -Suy

Attached to Project: Community Packages
Opened by loris caren (loris) - Monday, 27 June 2016, 07:14 GMT
Last edited by Antonio Rojas (arojas) - Saturday, 23 July 2016, 12:40 GMT
Task Type Bug Report
Category Packages
Status Closed
Assigned To Antonio Rojas (arojas)
Architecture x86_64
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
mythtv 1:0.28-3 was running perfectly on my i64 arch system until
a couple of days ago when I did a pacman -Suy. The mythbackend now core
dumps as soon as the frontend or the mythweb tries to do anything.

Additional info:
I've run it using gdb and get the following:-

Thread 21 "PT1" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff137fe700 (LWP 7653)]
0x00007fffeab038c0 in QMetaObject::indexOfClassInfo(char const*) const
() from /usr/lib/libQt5Core.so.5

I note that one of the (many) packages that got updated was qt5-base (now 5.6.1-2)
but reverting (just) qt5-base to 5.6.0.4 simply resulted in a new core dump that also seemed to be
within qt5 but at a different point.

Steps to reproduce:
1. pacman -Suy
2. start mythbackend and then connect to it via mythfrontend or new mythweb.
This task depends upon

Closed by  Antonio Rojas (arojas)
Saturday, 23 July 2016, 12:40 GMT
Reason for closing:  Fixed
Additional comments about closing:  mythtv 0.28-4
Comment by Doug Newgard (Scimmia) - Tuesday, 28 June 2016, 01:07 GMT
Current Qt5 is 5.7.0. Does it still have the same issue?
Comment by loris caren (loris) - Tuesday, 28 June 2016, 07:33 GMT
yes - I've just done a fresh pacman -Suy and I'm still getting similar effects:-

Thread 23 "PT4" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff197fa700 (LWP 26995)]
0x00007fffea711840 in QMetaObject::indexOfClassInfo(char const*) const ()
from /usr/lib/libQt5Core.so.5
(gdb)
Comment by loris caren (loris) - Wednesday, 29 June 2016, 07:19 GMT
Slight correction: updating qt5-base from 5.6.1-2 to 5.7.0 does now allow the frontend to work properly but
I'm still crashing the backend by trying to use the WebFrontend interface (port 6544). Yesterdays gdb trace
produced by this method.
Comment by loris caren (loris) - Friday, 08 July 2016, 08:44 GMT
solved by applying https://github.com/MythTV/mythtv/pull/122/commits/36e180fbf8809f3c357e2eff6e5623b5abb67c4d referenced by the thread
https://bbs.archlinux.org/viewtopic.php?pid=1631996#p1631996

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