[Korganizer-devel] [Bug 140688] New: calendar file grows by 20 megabytes causes korganizer to crash (all system memory exhausted) when any operation on it is performed

[Michał Kosmulski]

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http://bugs.kde.org/show_bug.cgi?id=140688         
           Summary: calendar file grows by 20 megabytes causes korganizer to
                    crash (all system memory exhausted) when any operation
                    on it is performed
           Product: korganizer
           Version: unspecified
          Platform: Slackware Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: korganizer-devel kde org
        ReportedBy: mkosmul users sourceforge net


Version:            (using KDE KDE 3.5.3)
Installed from:    Slackware Packages
OS:                Linux

I noticed just today that my korganizer generated, for no apparent reason, a big change in my calendar file (the change is described below). After this change, the calendar file grew from about 9 to about 34 MB and performing any operation in the calendar, e.g. adding and event or modifying an existing one causes korganizer to first allocate all memory it can get from the system (512 MB RAM and 512 MB swap - one can see the swap fill up withing a dozen or so seconds in the system monitor) and then to crash.
Here is the description of the change korganizer performed. Fortunately, I had a backup from yesterday afternoon and noticed the problem today in the afternoon so I could compare the two versions. I have most probably not performed any editions between the two versions and if any, it was the kind of changes I perform every day (adding a simple event or perhaps moving an existing one around).
I diffed the two versions and here is the significant change:

BEGIN:VEVENT
-DTSTAMP:20070125T174854Z
+DTSTAMP:20070125T221232Z
 ORGANIZER;CN=Anonymous:MAILTO:nobody nowhere
 CREATED:20070116T224008Z
 UID:KOrganizer-2020110447.714
 @ -132600,7 +132600,340086  @
  Ã<82>Â<82>Ã<83>Â<82>Ã<82>Â<82>Ã<83>Â<83>Ã<82>Â<83>Ã<83>Â<82>Ã<82>Â<83>Ã<83>Â<83>Ã<82>Â<82>Ã
  <83>Â<82>Ã<82>Â<83>Ã<83>Â<83>Ã<82>Â<83>Ã<83>Â<82>Ã<82>Â<82>Ã<83>Â<83>Ã<82>Â<82>Ã<83>Â<82>Ã<82>
  Â<82>Ã<83>Â<83>Ã<82>Â<83>Ã<83>Â<82>Ã<82>Â<83>Ã<83>Â<83>Ã<82>Â<82>Ã<83>Â<82>Ã<82>Â<82>Ã<83>Â
- <83>Ã<82>Â<83>Ã<83>Â<82>Ã<82>Â<82>Ã<83>Â<83>Ã<82>Â<82>Ã<83>Â<82>Ã<82>³lne
+ <83>Ã<82>Â<83>Ã<83>Â<82>Ã<82>Â<82>Ã<83>Â<83>Ã<82>Â<82>Ã<83>Â<82>Ã<82>Â<83>Ã<83>Â<83>Ã<82>Â<83>

<snip many megabytes (!) of lines like the last line above>

+ Â<82>Ã<83>Â<83>Ã<82>Â<82>Ã<83>Â<82>Ã<82>³lne                                   dane/inne/dzwiek/XXXXXXXXXXXXXXXXXXXX
 ACTION:AUDIO                                                                    TRIGGER;VALUE=DURATION:-PT5M
 @ -132609,7 +472688,7  @                                                        END:VEVENT

The path in the filesystem of the music file to play should be "wspólne dane/inne/dzwiek/XXXXXXXXXXXXXXXXXXXX". My filesystem uses UTF-8 encoding and apparently, the 'ó' gets garbled by being encoded to UTF-8 multiple times (i.e. the two bytes representing it in UTF-8 are again treated as 8-bit characters and encoded to UTF-8 thus being replaced by 2 bytes each and so on). So it seems like this entry perhaps doubled each time the calendar was saved and just passed the critical size today (because it was garbled in the backed up version too, only several times smaller).

After I manually deleted the offending entry (using vim), the calendar file shrunk to slightly above 700 kB and korganizer handles it without any problems.

I don't know if this could be related to #140211.

Here are my locale setting as printed by "locale" in a new konsole window:
LANG=en_US.UTF-8
LC_CTYPE=pl_PL.UTF-8
LC_NUMERIC="en_US.UTF-8"
LC_TIME=en_GB.UTF-8
LC_COLLATE=pl_PL.UTF-8
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=pl_PL.UTF-8
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT=pl_PL.UTF-8
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

My KDE locale is Polish but the KDE language is English.