More QtScript crashes? Or QtCore/Grantlee?

[Milian Wolff]

Hey all,

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/

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:

# in build/dir/kdevplatform/plugins/filetemplates
valgrind --track-origins=yes --smc-check=all ./testfiletemplates

So maybe it's again related to total heap size?

Can someone help?
-- 
Milian Wolff
mail at milianw.de
http://milianw.de
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