runtime: Double free or corruption on Raspbian

After the move from .NETCore 2.0 to 2.1 this started happening very frequently. PowerShell running on Raspberry Pi 3 Model B (“Raspbian GNU/Linux 9 (stretch)”) crashes with: *** Error in "pwsh": double free or corruption (fasttop): 0x6e800fe0 ***

stack from gdb:

Thread 6076 "pwsh" received signal SIGABRT, Aborted.
[Switching to Thread 0x63647450 (LWP 32303)]
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
dotnet/coreclr#1  0x76bc2824 in __GI_abort () at abort.c:89
dotnet/coreclr#2  0x76bfbf78 in __libc_message (do_abort=do_abort@entry=2, fmt=<optimized out>) at ../sysdeps/posix/libc_fatal.c:175
dotnet/coreclr#3  0x76c02ad4 in malloc_printerr (action=<optimized out>, str=0x76cb5120 "double free or corruption (fasttop)", ptr=<optimized out>, ar_ptr=<optimized out>) at malloc.c:5049
dotnet/coreclr#4  0x76c03514 in _int_free (av=0x6e800010, p=0x6e800fd8, have_lock=<optimized out>) at malloc.c:3905
dotnet/coreclr#5  0x768381e0 in HeapFree () from /home/pi/PSP3_2/libcoreclr.so
dotnet/coreclr#6  0x765fd0aa in EEHeapFreeInProcessHeap(unsigned int, void*) () from /home/pi/PSP3_2/libcoreclr.so
dotnet/coreclr#7  0x76532c70 in operator delete(void*) () from /home/pi/PSP3_2/libcoreclr.so
dotnet/coreclr#8  0x765adff0 in Thread::intermediateThreadProc(void*) () from /home/pi/PSP3_2/libcoreclr.so
dotnet/coreclr#9  0x76851966 in CorUnix::CPalThread::ThreadEntry(void*) () from /home/pi/PSP3_2/libcoreclr.so
dotnet/coreclr#10 0x76ecefc4 in start_thread (arg=0x63647450) at pthread_create.c:335
dotnet/coreclr#11 0x76c66c68 in ?? () at ../sysdeps/unix/sysv/linux/arm/clone.S:76 from /lib/arm-linux-gnueabihf/libc.so.6

Can share the core file with above stack.