pyspi [Bug 318135] New: Improvements to error handling

["pyspi (bugzilla.gnome.org)" <bugzilla-daemon bugzilla gnome org>]

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http://bugzilla.gnome.org/show_bug.cgi?id=318135
 pyspi | general | Ver: CVS HEAD

           Summary: Improvements to error handling
           Product: pyspi
           Version: CVS HEAD
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: general
        AssignedTo: pyspi-maint gnome bugs
        ReportedBy: dmalcolm redhat com
         QAContact: pyspi-maint gnome bugs
                CC: all-bugs bugzilla gnome org


Please describe the problem:
Currently pyspi throws away AT-SPI errors
We should install an error handler callback, and use this to raise a Python
exception when errors occur in an AT-SPI call

Steps to reproduce:
1. Run a Dogtail script talking to an application
2. Kill the application, or kill at-spi-registryd



Actual results:
Watch various errors scroll by, printed to the terminal.

Expected results:
An exception should be raised in Python

Does this happen every time?


Other information:
I attempted to fix this (some stubs are in CVS, IIRC), didn't work; I think
there's the wrong level of indirection for the callback function pointer, which
is confusing Pyrex.

(NB exceptions inside Pyrex get thrown away.  We may need to save the error data
in the callback, then check after every C function call if an error state is set)

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