Automated Build Generator

On Xenial, the build-generator (0.7.18-b219) hangs with 100% CPU usage:

DEPLOY/PROJECT: 100.00 %
ORCHESTRATION: 0.00 %: Configuring orchestration jobs
ORCHESTRATION: ?. %: distribution-prepare-lsp-famula-nightly
^C

Unhandled SB-SYS:INTERACTIVE-INTERRUPT in thread #<SB-THREAD:THREAD "main thread" RUNNING {10079D6EC3}>: Interactive interrupt at #x200003D2.
Backtrace for: #<SB-THREAD:THREAD "main thread" RUNNING {10079D6EC3}>
0: (SB-VM::GENERIC-<)
1: (CXML-STP-IMPL::%UNCHECKED-INSERT-CHILD #.(CXML-STP:ELEMENT :LOCAL-NAME "description") #.(CXML-STP:TEXT :DATA "text") 0)
2: ((:METHOD CXML-STP:INSERT-CHILD (CXML-STP:PARENT-NODE CXML-STP:NODE T)) #.(CXML-STP:ELEMENT :LOCAL-NAME "description") #.(CXML-STP:TEXT :DATA "text") 0) [fast-method]
3: ((:METHOD XML.LOCATION::CREATE-XPATH-ELEMENT (CXML-STP:NODE (EQL :CHILD) (EQL :TEXT) (EQL NIL))) #.(CXML-STP:ELEMENT :LOCAL-NAME "description") #<unused argument> #<unused argument> #<unused argument>) [fast-method]
4: ((LABELS XML.LOCATION::ONE-STEP :IN XML.LOCATION::CREATE-XPATH) #.(CXML-STP:ELEMENT :LOCAL-NAME "description") (:CHILD :TEXT))
5: ((LABELS XML.LOCATION::ONE-STEP :IN XML.LOCATION::CREATE-XPATH) #.(CXML-STP:ELEMENT :CHILDREN '(#.(CXML-STP:ELEMENT :CHILDREN '(#.(CXML-STP:TEXT :DATA "tag")) :LOCAL-NAME "name") #.(CXML-STP:ELEMENT :LOCAL-NAME "description") #.(CXML-STP:ELEMENT :CHILDREN '(#.(CXML-STP:TEXT :DATA ""))