Item2265: On Windows, Foswiki::Func::saveAttachment appears to call the commonTagsHandler

Debugging a problem with the DirectedGraphPlugin, it appears that on Windows, when the plugin calls the Foswiki::Func::saveAttachment function to attach a generated file, it results in a recursive call to the commonTagsHandler and afterCommonTagsHandler. This call does not happen on Linux.

Foswiki 1.0.7 on Windows - debug output

| 2009-10-17T02:38:55Z debug | DirectedGraphPlugin - ### forceAttachAPI = &vbar;off&vbar;  attachPath = &vbar;&vbar;  |
| 2009-10-17T02:38:55Z debug | DirectedGraphPlugin - attaching DirectedGraphPlugin_4.png using Foswiki API  |
| 2009-10-17T02:38:57Z debug | DirectedGraphPlugin - - DirectedGraphPlugin::commonTagsHandler( System.DirectedGraphPlugin ) length= 43  |
| 2009-10-17T02:38:57Z debug | DirectedGraphPlugin -  <<< EXIT  commonTagsHandler - Graphs found 0   |

Same plugin run on Foswiki 1.0.7 on Linux

| 2009-10-17T03:11:58Z debug | DirectedGraphPlugin - ### forceAttachAPI = &vbar;off&vbar;  attachPath = &vbar;&vbar;  |
| 2009-10-17T03:11:58Z debug | DirectedGraphPlugin - attaching DirectedGraphPlugin_4.png using Foswiki API  |
| 2009-10-17T03:11:58Z debug | DirectedGraphPlugin - attaching DirectedGraphPlugin_4.pdf using Foswiki API  |

I can fix the plugin by testing to be sure that the calls to the tagsHandler routines are bypassed when processing a file attachment, but I don't believe that it is supposed to work this way and might break other plugins on Windows.

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Added debug code to the plugin to die if called recursively. Rebooted windows VM, and now the problem is not happening. No hint about why it was failing previously.

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Closing this as No Action required. I've not seen any more recurrences of this issue - Probably a local issue.