debugger invoked on a SB-WIN32:EXCEPTION in thread
#<THREAD "main thread" RUNNING {1001470613}>:
  An exception occurred in context #.(SB-SYS:INT-SAP #X0022C470): #.(SB-SYS:INT-
SAP #X0022D680). (Exception code: 1722)

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [CONTINUE] Return from the exception handler
  1: [ABORT   ] Exit debugger, returning to top level.

(SB-KERNEL:HANDLE-WIN32-EXCEPTION #.(SB-SYS:INT-SAP #X0022C470) #.(SB-SYS:INT-SA
P #X0022D680))
0] BACKTRACE

Backtrace for: #<SB-THREAD:THREAD "main thread" RUNNING {1001470613}>
0: (SB-KERNEL:HANDLE-WIN32-EXCEPTION #.(SB-SYS:INT-SAP #X0022C470) #.(SB-SYS:INT
-SAP #X0022D680))
1: ("foreign function: call_into_lisp")
2: ("foreign function: funcall2")
3: ((LABELS QT::ARGLIST-MARSHALLER :IN QT::ARGLIST-MARSHALLER) (#<Qt::QWidget  {
102C497E23}> 17) #<CLOSURE (LAMBDA (QT::STACK) :IN QT::%%CALL) {102C49911B}>)
4: (QT::%%NEW #<Qt::QFileDialog  {102C498513}> (#<Qt::QWidget  {102C497E23}> 17)
 #<CLOSURE (LABELS QT::ARGLIST-MARSHALLER :IN QT::ARGLIST-MARSHALLER) {102C49907
B}> #.(SB-SYS:INT-SAP #X7FED6CD5550) 8 #.(SB-SYS:INT-SAP #X003953B0))
5: (QT-TEST::MAIN)
6: (SB-INT:SIMPLE-EVAL-IN-LEXENV (QT-TEST::MAIN) #<NULL-LEXENV>)
7: (EVAL (QT-TEST::MAIN))
8: (INTERACTIVE-EVAL (QT-TEST::MAIN) :EVAL NIL)
9: (SB-IMPL::REPL-FUN NIL)
10: ((FLET "LAMBDA0" :IN "SYS:SRC;CODE;TOPLEVEL.LISP"))
11: (SB-IMPL::%WITH-REBOUND-IO-SYNTAX #<CLOSURE (FLET "LAMBDA0" :IN "SYS:SRC;COD
E;TOPLEVEL.LISP") {22F7FB}>)
12: (SB-IMPL::TOPLEVEL-REPL NIL)
13: (SB-IMPL::TOPLEVEL-INIT)
14: ((FLET SB-UNIX::BODY :IN SAVE-LISP-AND-DIE))
15: ((FLET "WITHOUT-INTERRUPTS-BODY-14" :IN SAVE-LISP-AND-DIE))
16: ((LABELS SB-IMPL::RESTART-LISP :IN SAVE-LISP-AND-DIE))
17: ("foreign function: call_into_lisp")
18: ("foreign function: funcall0")