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From "Andrew Grieve (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CB-1404) EXC_BAD_ACCESS when using XHR_WITH_PAYLOAD bridge mode
Date Wed, 14 Nov 2012 19:02:12 GMT

    [ https://issues.apache.org/jira/browse/CB-1404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497348#comment-13497348
] 

Andrew Grieve commented on CB-1404:
-----------------------------------

Hmm, yeah, not sure what's going on. If it's reproducible, might be worth putting a try/catch
in there to see if a JS exception is happening.

Of note:
-XHR_WITH_PAYLOAD is not used in 2.2 by default. It's always NO_PAYLOAD.
-This CL makes it even less likely to attempt an XHR when there is already one in progress:
https://git-wip-us.apache.org/repos/asf?p=incubator-cordova-js.git;a=blobdiff;f=lib/ios/exec.js;h=7ce52d94da0e834104e0ee5cc1ceb70e8cbe8104;hp=c6b8edd7f9518c0a1ca726db2216f64a45a0e0a7;hb=86411246aba4292734b9bb46dc9128e28391e424;hpb=c3517e7703ab9a1335db8a3d0974b045ae3107e5
                
> EXC_BAD_ACCESS when using XHR_WITH_PAYLOAD bridge mode 
> -------------------------------------------------------
>
>                 Key: CB-1404
>                 URL: https://issues.apache.org/jira/browse/CB-1404
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: iOS
>    Affects Versions: 2.1.0
>         Environment: iPad 2, iOS 5.1.1
>            Reporter: Tom Clarkson
>            Assignee: Andrew Grieve
>             Fix For: 2.2.0
>
>
> When calling a plugin the app crashes on WebThread with EXC_BAD_ACCESS in WebCore::DocumentThreadableLoader::cancel.
> This appears to be some sort of timing issue, as it does not happen on every call - I
am seeing it in an autosave function which makes lots of calls to PGSQLitePlugin. 
> The error did not appear before upgrading to 2.1, and setting the bridge mode to IFRAME_NAV
restores the previous behaviour (no crashes, but odd scrolling functionality).
> Setting the bridge mode to XHR_NO_PAYLOAD also seems to fix it - not sure if removing
the payload actually does anything different or just makes it fast enough that the timing
condition does not come up in normal app usage.
>   

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