Unhandled TYPE-ERROR in thread #<SB-THREAD:THREAD "Anonymous thread" RUNNING
                                  {1008151563}>:
  The value
    (#<QURI.URI:URI > "*Help*")
  is not of type
    (OR NULL (CONS STRING T))
  when binding STR::STRINGS

Backtrace for: #<SB-THREAD:THREAD "Anonymous thread" RUNNING {1008151563}>
0: (STR:JOIN " " (#<QURI.URI:URI > "*Help*")) [external]
1: (PROMPTER::FORMAT-PROPERTIES (:DEFAULT #<QURI.URI:URI > :TITLE "*Help*") NIL)
2: ((:METHOD INITIALIZE-INSTANCE :AFTER (PROMPTER:SUGGESTION)) #<PROMPTER:SUGGESTION {1008158043}> :SOURCE #<BUFFER-SOURCE {100802F453}> :INPUT "") [fast-method]
3: ((LAMBDA (SB-PCL::|.P0.| SB-PCL::|.P1.| SB-PCL::|.P2.| SB-PCL::|.P3.|)) #<unavailable argument> #<unavailable argument> #<unavailable argument> #<unavailable argument>)
4: ((LAMBDA NIL :IN PROMPTER::UPDATE))
5: ((LAMBDA NIL :IN BORDEAUX-THREADS::BINDING-DEFAULT-SPECIALS))
6: ((FLET SB-UNIX::BODY :IN SB-THREAD::RUN))
7: ((FLET "WITHOUT-INTERRUPTS-BODY-11" :IN SB-THREAD::RUN))
8: ((FLET SB-UNIX::BODY :IN SB-THREAD::RUN))
9: ((FLET "WITHOUT-INTERRUPTS-BODY-4" :IN SB-THREAD::RUN))
10: (SB-THREAD::RUN)
11: ("foreign function: call_into_lisp")

unhandled condition in --disable-debugger mode, quitting
Unhandled SB-THREAD:JOIN-THREAD-ERROR in thread #<SB-THREAD:THREAD "main thread" RUNNING
                                                   {1000F18103}>:
  Joining thread failed: thread #<THREAD "cl-cffi-gtk main thread" ABORTED
                                   {1007FC67C3}> did not return normally.

Backtrace for: #<SB-THREAD:THREAD "main thread" RUNNING {1000F18103}>
0: (SB-DEBUG::DEBUGGER-DISABLED-HOOK #<SB-THREAD:JOIN-THREAD-ERROR {1008153443}> #<unused argument> :QUIT NIL)