I ran into an interesting problem involving switching back and forth between
locales and boiled it down to the following:
NB. Start of script ___________________
doit=:3 : 'do_temp_ ''0!:111 ''''(+ test_temp_ 1 2 3)'''''''
test_temp_=:1 : 0
u try_base_ y
)
try_base_=:1 : 0
u testname_base_ y
)
testname_z_=:1 : 0
('testname run in ',(>coname''),' locale') (1!:2)2
u y
)
try2_base_=:1 : 0
u testname_base_~ y
)
NB. End of script ____________________
My J session with the above script follows.
In the session below, notice that the first time doit runs testname runs in
the temp locale. That is wrong. It should be running in the base locale.
Then I turned on debug. Now it shows as running in the base locale as it
should.
While testing this I stumbled into a J crash. Setting try to try2 which
incorrectly has a tilde after testname_base_ and with debug on causes and
error as it should. However, turning debug off afterward causes J to hang.
In Vista the J window text goes gray and Windows says the program has
stopped working. I copied the session to the clipboard just before I pressed
enter to turn off debug at which time J stopped working.
Running Vista
9!:14''
j602/2008-03-03/16:45
load 'd:\juser\temp\133.ijs'
doit''
(+ test_temp_ 1 2 3)
testname run in temp locale
1 2 3
13!:0]1
doit''
(+ test_temp_ 1 2 3)
testname run in base locale
1 2 3
try=:try2
doit''
(+ test_temp_ 1 2 3)
|domain error: testname_base_
|testname_base_[:0]
13!:0]0
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