[kmail2] [Bug 358430] New: Consecutive quotes make message extremely long, which in turn makes KMail freeze when replying.

[via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=358430

            Bug ID: 358430
           Summary: Consecutive quotes make message extremely long, which
                    in turn makes KMail freeze when replying.
           Product: kmail2
           Version: 5.1
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: composer
          Assignee: kdepim-bugs at kde.org
          Reporter: a.skembris at gmail.com

I exchanged a few messages with one of my clients, each a few lines long. The
first message they sent me had an attachment but the rest of them didn't.

After a few messages where exchanged, the quoted messages got longer and
longer. To make a long story short, after about seven messages, the quoted
lines exceeded 5500 lines (I copied and pasted the message on KWrite), most of
them empty. Needless to say, the exchanged text was nowhere near as long, more
like a hundred lines at most.

Problem is, when I last replied to this message KMail started freezing. It
would take up a whole core of the processor for about 30 seconds, and become
totally unresponsive. Then, it would unfreeze for a few seconds and then start
again. 

Also, selecting this message from the message list view causes KMail to freeze
again, albeit for only a few seconds in that case (and it happens only once,
the program then behaves normally).

In general, I think there is something iffy about the quoting process. Quoted
messages tend to end up with considerable more lines than they originally
contained. I will attach the last message so that you can verify that something
is wrong with the quoting process.

Copying and pasting the (5000 line long) message in a new composer window seems
to reproduce the behaviour.

I don't mind the message bloat so much, but the freezing is extremely annoying.

Using version 5.1.1 and openSUSE rpms. At your disposal for further testing.

Reproducible: Always

Steps to Reproduce:
1. Create a new message or reply to an old message with a large amount of
quoted lines (not sure but more than 5000?)


Actual Results:  
Kmail freezes for 30 seconds every few seconds.

Expected Results:  
Kmail should behave normally

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