(gdb) bt
#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#1  __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#3  0x00007072b524527e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4  0x00007072b52288ff in __GI_abort () at ./stdlib/abort.c:79
#5  0x000055fad8ea081b in ExceptionalCondition (
    conditionName=conditionName@entry=0x55fad8f0c380 "do_prune || nplans > 0 || vmflags & VISIBILITYMAP_VALID_BITS", 
    fileName=fileName@entry=0x55fad8fa5fb8 "heapam_xlog.c", lineNumber=lineNumber@entry=117) at assert.c:65
#6  0x000055fad895d1f7 in heap_xlog_prune_freeze (record=0x55faf23f0ce0) at heapam_xlog.c:117
#7  0x000055fad895ecc3 in heap2_redo (record=<optimized out>) at heapam_xlog.c:1355
#8  0x000055fad89d112c in ApplyWalRecord (xlogreader=0x55faf23f0ce0, record=record@entry=0x7072b5e181d8, 
    replayTLI=replayTLI@entry=0x7fff92f13be0) at xlogrecovery.c:2013
#9  0x000055fad89d48f8 in PerformWalRecovery () at xlogrecovery.c:1833
#10 0x000055fad89c55f0 in StartupXLOG () at xlog.c:5897
#11 0x000055fad8c9480b in StartupProcessMain (startup_data=<optimized out>, startup_data_len=<optimized out>) at startup.c:258
#12 0x000055fad8c8e0e3 in postmaster_child_launch (child_type=child_type@entry=B_STARTUP, child_slot=294, startup_data=startup_data@entry=0x0, 
    startup_data_len=startup_data_len@entry=0, client_sock=client_sock@entry=0x0) at launch_backend.c:268
#13 0x000055fad8c91479 in StartChildProcess (type=type@entry=B_STARTUP) at postmaster.c:3991
#14 0x000055fad8c94371 in PostmasterMain (argc=argc@entry=1, argv=argv@entry=0x55faf23ef840) at postmaster.c:1396
#15 0x000055fad8b9e9bf in main (argc=1, argv=0x55faf23ef840) at main.c:231