[PD] segfault using abstraction containing partconv~ in a larger patch

[Peter P.]

Dear list,

I have pd segfaulting when I try to open a larger patch, that contains
one abstraction which in turn contains Ben Saylor's [partconv~]
external. 

Only opening the abstraction itself does not cause the crash.

GDB Backtrace: 
#0  0x00007ffff6a51f69 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff5980e55 in partconv_perform (w=0x874b88) at partconv~.c:152
#2  0x0000000000490a35 in dsp_tick ()
#3  0x000000000047e0ad in m_mainloop ()
#4  0x00007ffff69e3b45 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x0000000000411c5e in _start ()

Does anyone have an idea what could be going wrong here? 

This is on 3.2.0-4-rt-amd64 #1 SMP PREEMPT RT Debian 3.2.54-2 x86_64
GNU/Linux with Pd vanilla Pd-0.45.0 from Miller's git.

Thank you so much!
best, P