Fix createLabel (..., true) (#3384)#3
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atari2600tim merged 1 commit intoatari2600tim:developmentfrom Mar 5, 2020
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* Simplified PR 3367 Split the functionality of PR 3367 into to internal functions one create Label in UserWindow and the other in the MainWindow Only functional change to PR 3367 is that fillbackground is non-optional again * Update TLuaInterpreter.cpp typo in errormsg
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<!-- Keep the title short & concise so anyone non-technical can
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#### Brief overview of PR changes/additions
Fixes Mudlet crash with IRC open when closing a profile
#### Motivation for adding to Mudlet
Mudlet should never crash
#### Other info (issues closed, discussion etc)
Closes Mudlet#7293. I'll fix other
cases of `Host* mpHost;` after this PR so we have consistency in the
codebase.
Running the provided test case through
[AddressSanitizer](https://wiki.mudlet.org/w/Compiling_Mudlet#Checking_memory_leaks_.26_other_issues_.28sanitizers.29_3)
revealed that mpHost was being used after it was deleted:
```
=================================================================
==17843==ERROR: AddressSanitizer: heap-use-after-free on address 0x623000025e58 at pc 0x5555560abe75 bp 0x7fffffff7460 sp 0x7fffffff7450
READ of size 8 at 0x623000025e58 thread T0
#0 0x5555560abe74 in QWeakPointer<QObject>::internalData() const /usr/include/x86_64-linux-gnu/qt6/QtCore/qsharedpointer_impl.h:711
#1 0x5555562c15ad in QPointer<dlgIRC>::data() const /usr/include/x86_64-linux-gnu/qt6/QtCore/qpointer.h:77
#2 0x5555562bd715 in QPointer<dlgIRC>::operator dlgIRC*() const /usr/include/x86_64-linux-gnu/qt6/QtCore/qpointer.h:85
#3 0x555556296c13 in dlgIRC::~dlgIRC() /home/vadi/Programs/Mudlet/src/dlgIRC.cpp:109
#4 0x555556296e1f in dlgIRC::~dlgIRC() /home/vadi/Programs/Mudlet/src/dlgIRC.cpp:112
#5 0x7ffff6ba04a0 in QObject::event(QEvent*) (/lib/x86_64-linux-gnu/libQt6Core.so.6+0x1a04a0)
...
```
This helped pinpoint the cause of the crash.
---------
Co-authored-by: Stephen Lyons <slysven@virginmedia.com>
Co-authored-by: Vadim Peretokin <vadi2@users.noreply.github.com>
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Split the functionality of PR 3367 into to internal functions one create Label in UserWindow and the other in the MainWindow
Only functional change to PR 3367 is that fillbackground is non-optional again
typo in errormsg
Brief overview of PR changes/additions
Motivation for adding to Mudlet
Other info (issues closed, discussion etc)