C-X 2 broken

[David Vinayak Wallace <Gumby at MIT-OZ>]

In Experimental MIT-Specific 18.0, Experimental System 93.11,
Experimental ZMail 49.4, microcode 226, gc@2, on Lisp Machine Six:


Insert your description of the circumstances here:

I typed C-X 2 and it bombed. Ps: there should be an extra newline
before the backtrace so that the backtrace and the description are
visually seperated.

>>TRAP 16234 (TRANS-TRAP)
The instance variable ZWEI:START-BP is unbound in #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426213 deactivated>.
Backtrace from the debugger:

ZWEI:SET-WINDOW-INTERVAL-1 (P.C. = 77)

 Arg 0 (WINDOW): #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426213 deactivated>
 Arg 1 (INTERVAL): #<ZMACS-BUFFER "FORK.LSP PS:<HACTRN.SOURCE> OZ:" 33532606>
Local 0 (FIRST-BP): NIL


(METHOD ZWEI:ZMACS-WINDOW SET-INTERVAL-INTERNAL) (P.C. = 103)

 Arg 0 (OPERATION): SET-INTERVAL-INTERNAL
 Arg 1 (BUFFER): #<ZMACS-BUFFER "FORK.LSP PS:<HACTRN.SOURCE> OZ:" 33532606>


FUNCALL (P.C. = 25)

 Arg 0 (FN): #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426213 deactivated>
 Rest arg (ARGS): (SET-INTERVAL-INTERNAL #<ZMACS-BUFFER "FORK.LSP PS:<HACTRN.SOURCE> OZ:" 33532606>)


(METHOD ZWEI:DISPLAYER AFTER INIT) (P.C. = 34)

 Arg 0 (OPERATION): INIT
 Arg 1 (IGNORE): #<DTP-LOCATIVE 22741054>


(METHOD ZWEI:ZMACS-WINDOW-PANE COMBINED INIT) (P.C. = 254)

 Rest arg (.DAEMON-CALLER-ARGS.): (INIT #<DTP-LOCATIVE 22741054>)
Local 1 (.DAEMON-MAPPING-TABLE.): #<ART-16B-6 16010341>
Local 2 (.VAL1.): #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426213 deactivated>
Local 3 (.VAL2.): NIL
Local 4 (.VAL3.): NIL


Remainder of stack:

TV:MAKE-WINDOW (P.C. = 151)
(METHOD ZWEI:ZWEI-FRAME CREATE-WINDOW) (P.C. = 54)
(METHOD ZWEI:ZMACS-FRAME TWO-EDITOR-WINDOWS) (P.C. = 116)
ZWEI:SWITCH-WINDOWS (P.C. = 72)
ZWEI:COM-TWO-WINDOWS (P.C. = 27)
ZWEI:COMMAND-EXECUTE (P.C. = 100)
ZWEI:MAKE-EXTENDED-COMMAND-INTERNAL (P.C. = 103)
ZWEI:COMMAND-EXECUTE (P.C. = 100)
ZWEI:PROCESS-COMMAND-CHAR (P.C. = 67)
(METHOD ZWEI:WINDOW EDIT) (P.C. = 465)
(INTERNAL (METHOD ZWEI:ZMACS-WINDOW COMBINED EDIT) 0) (P.C. = 74)
FUNCALL (P.C. = 25)
(METHOD ZWEI:DISPLAYER AROUND EDIT) (P.C. = 31)
(METHOD ZWEI:ZMACS-WINDOW COMBINED EDIT) (P.C. = 47)
ZWEI:ZMACS-WINDOW-TOP-LEVEL (P.C. = 46)
SI:PROCESS-TOP-LEVEL (P.C. = 121)