[dolphin] [Bug 422282] Crash when using the tree view mode of the details view

[Norbert Preining]

https://bugs.kde.org/show_bug.cgi?id=422282

Norbert Preining <norbert at preining.info> changed:

           What    |Removed                     |Added
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                 CC|                            |norbert at preining.info

--- Comment #14 from Norbert Preining <norbert at preining.info> ---
Created attachment 132742
  --> https://bugs.kde.org/attachment.cgi?id=132742&action=edit
valgrind output of double free crash of dolphin

I see a similar behavior (double free) with dolphin 20.08.2 on frameworks 5.75
when opening and closing a directory using the > sign in tree view, and the
directory has lots of entries (in my case /usr/bin).

The stack trace is 
4  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#5  0x00007fc544b00537 in __GI_abort () at abort.c:79
#6  0x00007fc544b596c8 in __libc_message (action=action at entry=do_abort,
fmt=fmt at entry=0x7fc544c67e31 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
#7  0x00007fc544b609ba in malloc_printerr (str=str at entry=0x7fc544c6a1a8 "double
free or corruption (fasttop)") at malloc.c:5347
#8  0x00007fc544b61cb5 in _int_free (av=0x7fc544c99b80 <main_arena>,
p=0x55812010e160, have_lock=0) at malloc.c:4266
#9  0x00007fc544a27959 in KFileItemModel::removeItems(KItemRangeList const&,
KFileItemModel::RemoveItemsBehavior) () from
/usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#10 0x00007fc544a33146 in KFileItemModel::setExpanded(int, bool) () from
/usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5

I did run it with valgrind dolphin 2>&1 | tee valgrind.log and attach the
output.

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