[asterisk-bugs] [Asterisk 0014970]: [patch] chan_vpb fails to catch exception on 1.4

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=14970 
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Reported By:                tzafrir
Assigned To:                qwell
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Project:                    Asterisk
Issue ID:                   14970
Category:                   Channels/General
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     closed
Asterisk Version:           SVN 
JIRA:                       SWP-269 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!): 189391 
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2009-04-25 04:01 CDT
Last Modified:              2009-11-05 13:22 CST
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Summary:                    [patch] chan_vpb fails to catch exception on 1.4
Description: 
On module startup, chan_vpb asks libvpb to scan for relevant hardware. If
libvpb fails to find any, it raises an exception:

	try {
		num_cards = vpb_get_num_cards();
	} catch (VpbException e) {
		ast_log(LOG_ERROR, "No Voicetronix cards detected\n");
		return AST_MODULE_LOAD_DECLINE;
	}

This seems to work as planned on trunk . However with 1.4 (on the same
system and same libvpb) I get

*CLI> module load chan_vpb.so
[Apr 25 11:56:50] ERROR[20919]: chan_vpb.cc:2720 ast_module_load_result
terminate called after throwing an instance of 'VpbException'
  what():  VPBREG_NO_VPB_DEVICES_DETECTED
/home/tzafrir/Proj/Asterisk/Git/asterisk/live_ast: line 170: 20919 Aborted
                $AST_BIN -C $AST_CONF "$@"

The fix/workaround (attached) is to use the parent class std::exception .

After which I get:

*CLI> module load chan_vpb.so
[Apr 25 11:58:40] ERROR[21550]: chan_vpb.cc:2722 ast_module_load_result
load_module(): No Voicetronix cards detected

and no panic.
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---------------------------------------------------------------------- 
 (0113217) svnbot (reporter) - 2009-11-05 13:22
 https://issues.asterisk.org/view.php?id=14970#c113217 
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Repository: asterisk
Revision: 228080

_U  trunk/
U   trunk/channels/chan_vpb.cc

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r228080 | qwell | 2009-11-05 13:22:01 -0600 (Thu, 05 Nov 2009) | 15 lines

Merged revisions 228079 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r228079 | qwell | 2009-11-05 13:14:25 -0600 (Thu, 05 Nov 2009) | 8 lines
  
  Fix crash on VPB exception when no hardware is present.
  
  (closes issue https://issues.asterisk.org/view.php?id=14970)
  Reported by: tzafrir
  Patches:
        vpb_exception.diff uploaded by tzafrir (license 46)
  Tested by: markwaters
........

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http://svn.digium.com/view/asterisk?view=rev&revision=228080 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-11-05 13:22 svnbot         Checkin                                      
2009-11-05 13:22 svnbot         Note Added: 0113217                          
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