[pws] Walkback in XmlSwikiStorage>>backupPage

[fefr]

Hi,

I'am running Swiki 1.1 with an 3.2a-image (ChangeSet #4599) on linux
(The vm was
built using Lex sources). Sometimes when I try to save a page I get a
walkback
in XmlSwikiStorage>>backupPage at the following location:

        (dir fileExists: oldPath)
                ifTrue: [oldStream _ dir oldFileNamed: oldPath.
                                oldStream setToEnd]             <-- here! ####
                ifFalse: [oldStream _ dir newFileNamed: oldPath].

dir fileExists: oldPath returns true, the filename is ok, the file
exists. But
dir oldFileNamed: oldPath returns nil. Has anyone encountered the same
problem?

I stepped through the code, StandardFileStream>>primOpen:writable:
returns nil.
I have no clue what went wrong

Thanks for reading,

Cheers,

felix