Here's a crash last night in KStars 3.5.9 beta ubuntu 20.04.3 nightly spa

Thread 14 "Thread (pooled)" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff9ffff700 (LWP 6066)]
tcache_get (tc_idx=<optimized out>) at malloc.c:2937
#0 tcache_get (tc_idx=<optimized out>) at malloc.c:2937
#1 __GI___libc_malloc (bytes=60) at malloc.c:3051
#2 0x00007ffff6a5c873 in SEP::addobjdeep(int, SEP::objliststruct*, SEP::objliststruct*, int) () from /lib/x86_64-linux-gnu/libstellarsolver.so.2
#3 0x00007ffff6a581da in SEP::Deblend::deblend(SEP::objliststruct*, int, SEP::objliststruct*, int, double, int, SEP::Lutz*) () from /lib/x86_64-linux-gnu/libstellarsolver.so.2
#4 0x00007ffff6a58a36 in SEP::Extract::sortit(SEP::infostruct*, SEP::objliststruct*, int, SEP::objliststruct*, int, double, double) () from /lib/x86_64-linux-gnu/libstellarsolver.so.2
#5 0x00007ffff6a5af63 in SEP::Extract::sep_extract(SEP::sep_image*, float, int, int, float*, int, int, int, int, double, int, double, SEP::sep_catalog**) () from /lib/x86_64-linux-gnu/libstellarsolver.so.2
#6 0x00007ffff6a18508 in InternalExtractorSolver::extractPartition(InternalExtractorSolver::ImageParams const&) () from /lib/x86_64-linux-gnu/libstellarsolver.so.2
#7 0x00007ffff6a216e9 in non-virtual thunk to QtConcurrent::RunFunctionTask<QList<FITSImage::Star> >::run() () from /lib/x86_64-linux-gnu/libstellarsolver.so.2
#8 0x00007ffff518cf82 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#9 0x00007ffff51899d2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ffff6b09609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007ffff4a54163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

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