More QtScript crashes? Or QtCore/Grantlee?

[Andreas Pakulat]

Hi,

On Wed, Nov 28, 2012 at 3:22 AM, Milian Wolff <mail at milianw.de> wrote:
> I think I found more QtScript crashes... Or something else in QtCore/Grantlee
> maybe - not sure :(
>
> I tried to extend the file template preview to show previews for all files in
> a tab widget. This reliably crashes for me, valgrind gave me this so far:
>
> ==14660== Jump to the invalid address stated on the next line
> ==14660==    at 0x263C7D20: ???
> ==14660==  Address 0x263c7d20 is not stack'd, malloc'd or (recently) free'd
> ==14660==
> ==14660==
> ==14660== Process terminating with default action of signal 11 (SIGSEGV)
> ==14660==  Access not within mapped region at address 0x263C7D20
> ==14660==    at 0x263C7D20: ???
> ==14660==  If you believe this happened as a result of a stack
> ==14660==  overflow in your program's main thread (unlikely but
> ==14660==  possible), you can try to increase the size of the
> ==14660==  main thread stack using the --main-stacksize= flag.
> ==14660==  The main thread stack size used in this run was 8388608.
> ==14660==
>
> And quite a lot of this:
>
> ==14660== Conditional jump or move depends on uninitialised value(s)
> ==14660==    at 0xA95F86A: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xA97E8E0: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xA988A7C: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xA93F9D3: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0x3952AA44: ???
> ==14660==    by 0xA8F68AD: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xA8F6B15: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xAA26241: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xAA2CEF8: QScriptEngine::evaluate(QString const&, QString
> const&, int) (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0x21C1B92A: Kate::Script::require(QScriptContext*,
> QScriptEngine*) (katescripthelpers.cpp:138)
> ==14660==    by 0xAA496D7: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==    by 0xA95BE5F: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==  Uninitialised value was created by a stack allocation
> ==14660==    at 0xA95F820: ??? (in /usr/lib/libQtScript.so.4.8.3)
> ==14660==
>
>
> In KDevelop I got this via gdb: http://paste.kde.org/615908/

Seeing self-built Qt from gdb and what looks like system packages in
valgrind rings my BC-bell. But I guess you already checked that (by
not using your self-built Qt)?

> I really have no idea whats going on so far...
>
> To reproduce: I've pushed the offending commit to tabbed-filetemplate-preview
> branch in KDevplatform. Built it, then go to 'new file from template' and
> browse a bit. After 3-5 clicks I get a crash. I've added a test app but that
> seems to work quite stable:

The branch does not build, it misses a main.cpp in plugins/filetemplates/

Andreas