[asterisk-bugs] [Asterisk 0015421]: [patch] Serious problem in pattern matching

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15421 
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Reported By:                jsmith
Assigned To:                tilghman
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Project:                    Asterisk
Issue ID:                   15421
Category:                   PBX/pbx_config
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     closed
Target Version:             1.6.0.19
Asterisk Version:           SVN 
JIRA:                       SWP-273 
Regression:                 Yes 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2009-06-29 14:45 CDT
Last Modified:              2009-11-10 16:23 CST
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Summary:                    [patch] Serious problem in pattern matching
Description: 
There appears to be a serious problem in the pattern matching in
Asterisk... for some reason, it thinks the following two extensions are
equivalent, when they're not.

exten => _N[2-4]X,1,NoOp(foo)
exten => _N[246]X,1,NoOp(bar)
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---------------------------------------------------------------------- 
 (0113632) svnbot (reporter) - 2009-11-10 16:23
 https://issues.asterisk.org/view.php?id=15421#c113632 
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Repository: asterisk
Revision: 229363

_U  branches/1.6.0/
U   branches/1.6.0/main/pbx.c

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r229363 | tilghman | 2009-11-10 16:23:12 -0600 (Tue, 10 Nov 2009) | 26
lines

Merged revisions 229361 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/trunk

................
  r229361 | tilghman | 2009-11-10 16:14:22 -0600 (Tue, 10 Nov 2009) | 19
lines
  
  Merged revisions 229360 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r229360 | tilghman | 2009-11-10 16:09:16 -0600 (Tue, 10 Nov 2009) | 12
lines
    
    If two pattern classes start with the same digit and have the same
number of characters, they will compare equal.
    The example given in the issue report is that of [234] and [246],
which have
    these characteristics, yet they are clearly not equivalent.  The code
still
    uses these two characteristics, yet when the two scores compare equal,
an
    additional check will be done to compare all characters within the
class to
    verify equality.
    (closes issue https://issues.asterisk.org/view.php?id=15421)
     Reported by: jsmith
     Patches: 
           20091109__issue15421__2.diff.txt uploaded by tilghman (license
14)
     Tested by: jsmith, thedavidfactor
  ........
................

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http://svn.digium.com/view/asterisk?view=rev&revision=229363 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-11-10 16:23 svnbot         Checkin                                      
2009-11-10 16:23 svnbot         Note Added: 0113632                          
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