bug#68221: abort in call-scm<-scmn-scmn

[Christopher Baines]

I've got a core dump of Guile reaching the abort in call-scm<-scmn-scmn.

#0  0x00007fb8912d8fec in __pthread_kill_implementation () from 
/gnu/store/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35/lib/libc.so.6
#1  0x00007fb89128f202 in raise () from 
/gnu/store/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35/lib/libc.so.6
#2  0x00007fb89127a45b in abort () from 
/gnu/store/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35/lib/libc.so.6
#3  0x00007fb8917f8133 in vm_regular_engine (thread=0x7fb88587b240) at 
/tmp/guix-build-guile-3.0.9.drv-0/guile-3.0.9/libguile/vm-engine.c:3467
#4  0x00007fb89189adb5 in scm_call_n (proc=<optimized out>, argv=<optimized 
out>, nargs=0) at 
/tmp/guix-build-guile-3.0.9.drv-0/guile-3.0.9/libguile/vm.c:1615
#5  0x00007fb891801b3e in scm_call_with_unblocked_asyncs (proc=#<program 
7fb890d59fc0>) at 
/tmp/guix-build-guile-3.0.9.drv-0/guile-3.0.9/libguile/async.c:406
#6  0x00007fb89188d390 in vm_regular_engine (thread=0x7fb88587b240) at 
/tmp/guix-build-guile-3.0.9.drv-0/guile-3.0.9/libguile/vm-engine.c:972
#7  0x00007fb89189adb5 in scm_call_n (proc=<optimized out>, argv=<optimized 
out>, nargs=0) at 
/tmp/guix-build-guile-3.0.9.drv-0/guile-3.0.9/libguile/vm.c:1615


This happened with
/gnu/store/x4m56h5qkim0pnvx6vgvp541mrdwdrah-guile-3.0.9/bin/guile when
being used by the Guix Build Coordinator.

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