[asterisk-bugs] [Asterisk 0016758]: [patch] zero/empty argument to gosub yields callers $ARG1

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16758 
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Reported By:                wdoekes
Assigned To:                tilghman
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Project:                    Asterisk
Issue ID:                   16758
Category:                   Applications/app_stack
Reproducibility:            always
Severity:                   trivial
Priority:                   normal
Status:                     ready for testing
Target Version:             1.6.2.7
Asterisk Version:           SVN 
JIRA:                       SWP-856 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 244392 
Request Review:              
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Date Submitted:             2010-02-02 15:34 CST
Last Modified:              2010-03-16 17:42 CDT
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Summary:                    [patch] zero/empty argument to gosub yields callers
$ARG1
Description: 
Filed under app/app_stack as it's my most immediate problem, but it could
be filed under extensions.conf-parsing as well.

$ARG1..n behave like LOCAL() variables (I assume?). It's perfectly okay to
me that when I do not supply an Nth argument to a procedure, I get the
parents $ARGN instead. It is not okay, however, that my empty first
argument is ignored.

Two possible fixes:
- clean all the $ARGN's before entering the new frame (frame_set_var for
many arguments? expensive? not backward compatible)
- parse a zero-length argument list as one argument, not zero (depending
one where you do it, it could be okay)
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 (0119476) tilghman (administrator) - 2010-03-16 17:42
 https://issues.asterisk.org/view.php?id=16758#c119476 
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Patch updated.  The following notable changes:

1) Maximum number of arguments has been protected in a datastore, so it
cannot be modified in the dialplan.
2) A unit test has been written to verify the behavior of the Gosub suite
of applications. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-03-16 17:42 tilghman       Note Added: 0119476                          
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