(gdb) where
#0  virQEMUCapsNewForBinaryInternal (hostArch=VIR_ARCH_X86_64, binary=0x7fffe800d530 "/usr/bin/sjt-test", libDir=0x7fff94021dd0 "/var/lib/libvirt/qemu", runUid=0, runGid=0, microcodeVersion=1, 
    kernelVersion=0x7fff9400a7c0 "4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020", qmpOnly=false) at ../../src/qemu/qemu_capabilities.c:5262
#1  0x00007fffc3aacd95 in virQEMUCapsNewData (binary=<optimized out>, privData=<optimized out>) at ../../src/qemu/qemu_capabilities.c:5340
#2  0x00007ffff737a6e7 in virFileCacheNewData (name=0x7fffe800d530 "/usr/bin/sjt-test", cache=0x7fff940286d0) at ../../src/util/virfilecache.c:223
#3  virFileCacheValidate (cache=cache@entry=0x7fff940286d0, name=name@entry=0x7fffe800d530 "/usr/bin/sjt-test", data=data@entry=0x7ffff0b47410) at ../../src/util/virfilecache.c:294
#4  0x00007ffff737ab37 in virFileCacheLookup (cache=0x7fff940286d0, name=name@entry=0x7fffe800d530 "/usr/bin/sjt-test") at ../../src/util/virfilecache.c:327
#5  0x00007fffc3aad02e in virQEMUCapsCacheLookup (cache=<optimized out>, binary=0x7fffe800d530 "/usr/bin/sjt-test") at ../../src/qemu/qemu_capabilities.c:5477
#6  0x00007fffc3acc677 in qemuDomainPostParseDataAlloc (def=<optimized out>, caps=<optimized out>, parseFlags=<optimized out>, opaque=<optimized out>, parseOpaque=0x7ffff0b474b0) at ../../src/qemu/qemu_domain.c:4623
#7  0x00007ffff73a65a9 in virDomainDefPostParseInternal (def=def@entry=0x7fffe800cf20, caps=caps@entry=0x7fff94161560, parseFlags=parseFlags@entry=1026, xmlopt=xmlopt@entry=0x7fff94157830, 
    parseOpaque=parseOpaque@entry=0x0, bootHash=bootHash@entry=0x7fffe800d7e0) at ../../src/conf/domain_conf.c:5036
#8  0x00007ffff73bb6fd in virDomainDefParseXML (xml=xml@entry=0x7fffe800fcc0, root=root@entry=0x7fffe8003c40, ctxt=ctxt@entry=0x7fffe8006950, caps=caps@entry=0x7fff94161560, xmlopt=xmlopt@entry=0x7fff94157830, 
    parseOpaque=parseOpaque@entry=0x0, flags=1026) at ../../src/conf/domain_conf.c:19957
#9  0x00007ffff73bf11c in virDomainDefParseNode (xml=xml@entry=0x7fffe800fcc0, root=0x7fffe8003c40, caps=caps@entry=0x7fff94161560, xmlopt=xmlopt@entry=0x7fff94157830, parseOpaque=parseOpaque@entry=0x0, 
    flags=flags@entry=1026) at ../../src/conf/domain_conf.c:20144
#10 0x00007ffff73bf242 in virDomainDefParse (
    xmlStr=0x7fffe8010630 "<domain type='kvm'>\n  <name>sjt-test</name>\n  <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1809</uuid>\n  <memory unit='KiB'>220160</memory>\n  <currentMemory unit='KiB'>219200</currentMemory>\n  <vcpu placemen"..., filename=filename@entry=0x0, caps=caps@entry=0x7fff94161560, xmlopt=xmlopt@entry=0x7fff94157830, parseOpaque=parseOpaque@entry=0x0, flags=flags@entry=1026) at ../../src/conf/domain_conf.c:20088
#11 0x00007ffff73bf293 in virDomainDefParseString (xmlStr=<optimized out>, caps=caps@entry=0x7fff94161560, xmlopt=xmlopt@entry=0x7fff94157830, parseOpaque=parseOpaque@entry=0x0, flags=flags@entry=1026)
    at ../../src/conf/domain_conf.c:20104
#12 0x00007ffff73bf2f2 in virDomainDefCopy (src=src@entry=0x7fffe8010f20, caps=caps@entry=0x7fff94161560, xmlopt=0x7fff94157830, parseOpaque=parseOpaque@entry=0x0, migratable=<optimized out>)
    at ../../src/conf/domain_conf.c:27416
#13 0x00007fffc3ad7bca in qemuDomainDefFormatBufInternal (driver=driver@entry=0x7fff94034de0, def=def@entry=0x7fffe8010f20, origCPU=origCPU@entry=0x0, flags=flags@entry=9, buf=buf@entry=0x7ffff0b47870)
    at ../../src/qemu/qemu_domain.c:5246
#14 0x00007fffc3ad815a in qemuDomainDefFormatXMLInternal (driver=driver@entry=0x7fff94034de0, def=def@entry=0x7fffe8010f20, origCPU=origCPU@entry=0x0, flags=flags@entry=9) at ../../src/qemu/qemu_domain.c:5432
#15 0x00007fffc3ad8196 in qemuDomainDefFormatXML (driver=driver@entry=0x7fff94034de0, def=def@entry=0x7fffe8010f20, flags=flags@entry=9) at ../../src/qemu/qemu_domain.c:5444
#16 0x00007fffc3ad81bd in qemuDomainDefCopy (driver=driver@entry=0x7fff94034de0, src=src@entry=0x7fffe8010f20, flags=flags@entry=9) at ../../src/qemu/qemu_domain.c:5218
#17 0x00007fffc3ad8345 in qemuDomainCheckABIStability (driver=driver@entry=0x7fff94034de0, vm=vm@entry=0x7fff940ebbd0, dst=dst@entry=0x7fffe8010f20) at ../../src/qemu/qemu_domain.c:7098
#18 0x00007fffc3b09066 in qemuMigrationBeginPhase (driver=driver@entry=0x7fff94034de0, vm=<optimized out>, 
    xmlin=xmlin@entry=0x7fffe80059a0 "<domain type='kvm'>\n  <name>sjt-test</name>\n  <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1809</uuid>\n  <memory unit='KiB'>220160</memory>\n  <currentMemory unit='KiB'>219200</currentMemory>\n  <vcpu placemen"..., dname=dname@entry=0x0, cookieout=cookieout@entry=0x7ffff0b47ba8, cookieoutlen=cookieoutlen@entry=0x7ffff0b47b9c, nmigrate_disks=0, migrate_disks=0x0, flags=328)
    at ../../src/qemu/qemu_migration.c:2120
#19 0x00007fffc3b09911 in qemuMigrationBegin (conn=0x7fffd4000d50, vm=<optimized out>, 
    xmlin=0x7fffe80059a0 "<domain type='kvm'>\n  <name>sjt-test</name>\n  <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1809</uuid>\n  <memory unit='KiB'>220160</memory>\n  <currentMemory unit='KiB'>219200</currentMemory>\n  <vcpu placemen"..., dname=0x0, cookieout=cookieout@entry=0x7ffff0b47ba8, cookieoutlen=cookieoutlen@entry=0x7ffff0b47b9c, nmigrate_disks=0, migrate_disks=0x0, flags=328) at ../../src/qemu/qemu_migration.c:2177
#20 0x00007fffc3b41280 in qemuDomainMigrateBegin3Params (domain=0x7fffe8001e60, params=<optimized out>, nparams=2, cookieout=0x7ffff0b47ba8, cookieoutlen=0x7ffff0b47b9c, flags=<optimized out>)
    at ../../src/qemu/qemu_driver.c:12389
#21 0x00007ffff741abe9 in virDomainMigrateBegin3Params (domain=domain@entry=0x7fffe8001e60, params=<optimized out>, nparams=2, cookieout=cookieout@entry=0x7ffff0b47ba8, cookieoutlen=cookieoutlen@entry=0x7ffff0b47b9c, 
    flags=328) at ../../src/libvirt-domain.c:4832
#22 0x000055555557cec8 in remoteDispatchDomainMigrateBegin3Params (server=0x55555581ef70, msg=0x5555558666b0, ret=0x7fffe8001a30, args=0x7fffe8006910, rerr=0x7ffff0b47ca0, client=<optimized out>)
    at ../../daemon/remote.c:5212
#23 remoteDispatchDomainMigrateBegin3ParamsHelper (server=0x55555581ef70, client=<optimized out>, msg=0x5555558666b0, rerr=0x7ffff0b47ca0, args=0x7fffe8006910, ret=0x7fffe8001a30) at ../../daemon/remote_dispatch.h:7421
#24 0x00007ffff748639c in virNetServerProgramDispatchCall (msg=0x5555558666b0, client=0x555555864260, server=0x55555581ef70, prog=0x55555583e7e0) at ../../src/rpc/virnetserverprogram.c:436
#25 virNetServerProgramDispatch (prog=0x55555583e7e0, server=server@entry=0x55555581ef70, client=0x555555864260, msg=0x5555558666b0) at ../../src/rpc/virnetserverprogram.c:307
---Type <return> to continue, or q <return> to quit---
#26 0x00005555555a8088 in virNetServerProcessMsg (msg=<optimized out>, prog=<optimized out>, client=<optimized out>, srv=0x55555581ef70) at ../../src/rpc/virnetserver.c:148
#27 virNetServerHandleJob (jobOpaque=<optimized out>, opaque=0x55555581ef70) at ../../src/rpc/virnetserver.c:169
#28 0x00007ffff736dba1 in virThreadPoolWorker (opaque=opaque@entry=0x55555580fbd0) at ../../src/util/virthreadpool.c:167
#29 0x00007ffff736cf18 in virThreadHelper (data=<optimized out>) at ../../src/util/virthread.c:206
#30 0x00007ffff6e4d6db in start_thread (arg=0x7ffff0b48700) at pthread_create.c:463
#31 0x00007ffff6b7661f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95