[korganizer] [Bug 374780] Huge memory usage just for the calendar with korgac and ical resource

[ederag]

https://bugs.kde.org/show_bug.cgi?id=374780

--- Comment #2 from ederag <edera at gmx.fr> ---
Created attachment 109701
  --> https://bugs.kde.org/attachment.cgi?id=109701&action=edit
illegal type for property: VALUE=DATE-TIME

Here is a clue: there were a lot of X-LIC-ERROR:

RDATE;VALUE=DATE-TIME:19230527T230000
X-LIC-ERROR;X-LIC-ERRORTYPE=PARAMETER-VALUE-PARSE-ERROR:Got a VALUE 
 parameter with an illegal type for property: VALUE=DATE-TIME
X-LIC-ERROR;X-LIC-ERRORTYPE=PARAMETER-VALUE-PARSE-ERROR:Got a VALUE 
 parameter with an illegal type for property: VALUE=DATE-TIME

kquitapp korganizer,
kquitapp korgac
akonadictl stop

removing them with kwrite
search/replace mode "Escape sequences" (on a single line, without quotes)
"\nX-LIC-ERROR;X-LIC-ERRORTYPE=PARAMETER-VALUE-PARSE-ERROR:
Got a VALUE \n parameter with an illegal type for property: VALUE=DATE-TIME" 
replace: empty
=>between 7000 and 8000 replacements...

akonadictl start
korganizer

korgac memory < 170 MB


As a check, brought back the previous std.ics. => 2GB.
New one => fine.

Unfortunately, each time akonadi is started or stopped, 
a new X-LIC-ERROR appear.
(one for each RDATE;VALUE=DATE-TIME line)

>From this rate, it seems that the problem started less than 2 months ago.
System: openSUSE-Leap-42.2
The last update for kdepim was 5 months ago.
https://build.opensuse.org/project/show/openSUSE:Leap:42.2:Update
Maybe the last daylight change, about 2 months ago ?

the RDATE;VALUE=DATE-TIME:19230527T230000 format seems valid though
https://www.kanzaki.com/docs/ical/rdate.html
The years are weird (1923 ?), but removing those RDATE lines
make all December appointments shift by 1 hour for instance.
So they seem efficient somehow.

head_18105ca.ics, which contains only the VTIMEZONE,
is enough to reproduce the behavior.

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