[Libreoffice-bugs] [Bug 109150] New: EDITING Writer freezes when document is editet

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=109150

            Bug ID: 109150
           Summary: EDITING Writer freezes when document is editet
           Product: LibreOffice
           Version: 6.0.0.0.alpha0+ Master
          Hardware: x86-64 (AMD64)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: Stefan_Lange_KA at T-Online.de

Created attachment 134676
  --> https://bugs.documentfoundation.org/attachment.cgi?id=134676&action=edit
zip file with test documents and several screenshots

In LO Writer from builds younger (!) than

libo-master64~2017-07-12_23.21.39_LibreOfficeDev_6.0.0.0.alpha0_Win_x64.msi
resp.
libo-master~2017-07-13_05.02.25_LibreOfficeDev_6.0.0.0.alpha0_Win_x86.msi

I have the problem, that Writer "freezes", when I make some changes in my
edited documents. Writer doesn't answer and in the Task Manager I see, that the
program uses many cpu capacity.
Sometimes the programs wakes up alone after a certain time (some minutes)
without any actions, but mostly it doesn't.
But I have seen, that it wakes up often (but not allways) after I have made and
saved a screenshot with "Snipping Tool". Then cpu of LibreOffice decreases to 0
or near 0 and Writer answers again.

For demonstration I have edited my test document "Test_Altix V - Abbau des
Kameradeckels.odt" (in the attached zip file) without any problems with
Version: 6.0.0.0.alpha0+
Build ID: d9e8fdbcd2f834a483890b409ede1b44c2da5da3
CPU threads: 1; OS: Windows 6.19; UI render: default; 
TinderBox: Win-x86 at 42, Branch:master, Time: 2017-07-13_05:02:25
Locale: de-DE (de_DE); Calc: group

The saved document with my changes is "Test_edited+saved_Altix V - Abbau des
Kameradeckels.odt" (also in the zip file).

Than I have tried to do the same with
Version: 6.0.0.0.alpha0+ (x64)
Build ID: f054b9187155bc32b7d06808aea87127cb0a3a4f
CPU threads: 2; OS: Windows 6.19; UI render: default; 
TinderBox: Win-x86_64 at 42, Branch:master, Time: 2017-07-15_22:51:09
Locale: de-DE (de_DE); Calc: group
and
Version: 6.0.0.0.alpha0+
Build ID: c7fe625c8d41f648f89765abc40bb7b8fd4ed12a
CPU threads: 1; OS: Windows 6.19; UI render: default; 
TinderBox: Win-x86 at 42, Branch:master, Time: 2017-07-16_02:04:02
Locale: de-DE (de_DE); Calc: group

and I got the freezes, see several screenshots in
"Screenshot_x64_*.*_(Loop)_Writer_Problem.JPG" (also in the zip files).

I have tested on both an old computer with x86 cpu and a newer with x64 cpu.

Steps to reproduce:
- open "Test_Altix V - Abbau des Kameradeckels.odt"
- copy the lines according to "Screenshot_1_Writer_Problem.JPG" at the end of
the document (see "Screenshot_2_Writer_Problem.JPG")
- change the copied lines according to "Test_edited+saved_Altix V - Abbau des
Kameradeckels.odt" resp. "Test_edited+saved_Altix V - Abbau des
Kameradeckels.pdf" (= odt document exported to pdf)

- after one enters some characters Writer stops, not answers on any actions,
but uses many cpu time (only with "younger" builds of LO)
- when Writer freezes longer, making a screenshot may help to wake up Writer

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