In Japanese envrionment (Japanese IM (input method) enabled), Step 1. Set Japanese IM to direct input mode Step 2. Type some English character (such as "a") Step 3. Set Japanese IM to Hiragana input mode Step 4. Type some Japanese Character (such as "あ") Step 5. Undo Problem: Writer is freezed.
Reported Japanese Askbot http://ask.libreoffice.org/ja/question/41898/writerwinban-gahurizusuru/ Hidemune Tanaka sent a patch: http://lists.freedesktop.org/archives/libreoffice/2014-December/065360.html
This behavior has been observed with Windows 7 64bit. It does not occur with Linux. In Windows, please check to install the IME. https://www.coscom.co.jp/learnjapanese801/install_ime.html
The following Japanese environment might need. (May not be necessary) http://www.froggie.sk/en/index.html
Based on my understanding, there's confirmation of this problem, so Status -> NEW.
@TANAKA Hidemune: Could you possibly submit that patch through gerrit - see: https://wiki.documentfoundation.org/Development/gerrit Thanks
It doesn't need to be Japanese. I can reproduce this with Chinese (ZH-TW). Version：5.0.0.5 Build ID：1b1a90865e348b492231e1c451437d7a15bb262b Locale：zh-TW (zh_TW)
*** This bug has been marked as a duplicate of bug 82293 ***
Sorry to bother. tdf#82293 looks related but not sure if it has the same root cause so I revert duplicate field again.
Mark Hung committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=e7760d428bc82ccfcae14f1907b78f9f1013b88c Fix tdf#87500 - Freeze with English/Japanese mixture undo. It will be available in 5.1.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Mark Hung committed a patch related to this issue. It has been pushed to "libreoffice-5-0": http://cgit.freedesktop.org/libreoffice/core/commit/?id=2b136504538a0b32e6ca9ae8fae8c41c084f4394&h=libreoffice-5-0 Fix tdf#87500 - Freeze with English/Japanese mixture undo. It will be available in 5.0.3. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Mark Hung committed a patch related to this issue. It has been pushed to "libreoffice-4-4": http://cgit.freedesktop.org/libreoffice/core/commit/?id=71f8125f21344b5481502d24930bcb6e25369dea&h=libreoffice-4-4 Fix tdf#87500 - Freeze with English/Japanese mixture undo. It will be available in 4.4.6. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.