C-X 4 F ...

[Robert P. Krajewski <RpK at MIT-OZ>]

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

gave me the following error, twice, in two invocations.  The first time,
it did it before it queried me for a file.  The second time, shown it
gory detail here, it happened after the query.

Insert your description of the circumstances here:


>>TRAP 16234 (TRANS-TRAP)
The instance variable ZWEI:START-BP is unbound in #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426274 deactivated>.
Backtrace from the debugger:

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

 Arg 0 (WINDOW): #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426274 deactivated>
 Arg 1 (INTERVAL): #<ZMACS-BUFFER "CHSAUX.LISP SRC:<L.IO> OZ:" 33603104>
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 "CHSAUX.LISP SRC:<L.IO> OZ:" 33603104>


FUNCALL (P.C. = 25)

 Arg 0 (FN): #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426274 deactivated>
 Rest arg (ARGS): (:SET-INTERVAL-INTERNAL #<ZMACS-BUFFER "CHSAUX.LISP SRC:<L.IO> OZ:" 33603104>)


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

 Arg 0 (OPERATION): :INIT
 Arg 1 (IGNORE): #<DTP-LOCATIVE 22741060>


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

 Rest arg (.DAEMON-CALLER-ARGS.): (:INIT #<DTP-LOCATIVE 22741060>)
Local 1 (.DAEMON-MAPPING-TABLE.): #<ART-16B-6 16010341>
Local 2 (.VAL1.): #<ZMACS-WINDOW-PANE Zmacs Window Pane 3 15426274 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-MODIFIED-TWO-WINDOWS (P.C. = 161)
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)
PROCESS-TOP-LEVEL (P.C. = 121)