Ticket #0000904

Type	Bug	Status	dismissed	Date	10-Jun-2009 11:22
Version	alpha 56	Category	n/a	Submitted by	Sunanda
Platform	All	Severity	not a bug	Priority	normal

Summary	do exit and quit: inconsistent behavior
Description	I am seeing inconsistent behavior: do "exit" ;; unset! do [exit] ;; error! do "quit" ;; none do [quit] ;; exits interpretor
Example code	do "exit" do [exit] do "quit" do [quit]

Assigned to	n/a	Fixed in	-	Last Update	10-Jun-2009 18:07

Comments
(0000924) BrianH 10-Jun-2009 18:06	That's OK, the differences are intended. Strings, files and URL's are scripts - blocks are code. Scripts do more than just executing the code: creating the script header, making modules, etc. One of those things is that they are evaluated in a slightly more secure manner, so EXIT, RETURN, QUIT and HALT are caught. It's a feature :) Though see #539 for the problem that caused RETURN and EXIT to be added to that list. Even though it may be a good idea to catch RETURN and EXIT in this case, we have no choice at the moment to do otherwise.

Comments

(0000924)
BrianH
10-Jun-2009 18:06

That's OK, the differences are intended. Strings, files and URL's are scripts - blocks are code. Scripts do more than just executing the code: creating the script header, making modules, etc. One of those things is that they are evaluated in a slightly more secure manner, so EXIT, RETURN, QUIT and HALT are caught. It's a feature :)

Though see #539 for the problem that caused RETURN and EXIT to be added to that list. Even though it may be a good idea to catch RETURN and EXIT in this case, we have no choice at the moment to do otherwise.

Date	User	Field	Action	Change
2-Nov-2010 22:23	BrianH	Comment : 0000924	Modified	-
10-Jun-2009 18:07	BrianH	Description	Modified	-
10-Jun-2009 18:07	BrianH	Code	Modified	-
10-Jun-2009 18:07	BrianH	Severity	Modified	minor => not a bug
10-Jun-2009 18:07	BrianH	Status	Modified	submitted => dismissed
10-Jun-2009 18:06	BrianH	Comment : 0000924	Added	-
10-Jun-2009 11:22	sunanda	Ticket	Added	-