Bug Hunting Session
Bug 80000 - A no-break space or non-breaking hyphen prevents a preceding valid line break opportunity
Summary: A no-break space or non-breaking hyphen prevents a preceding valid line break...
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
(earliest affected)
3.5.4 release
Hardware: All All
: medium normal
Assignee: Not Assigned
Depends on:
Blocks: Formatting-Mark
  Show dependency treegraph
Reported: 2014-06-13 19:51 UTC by Simo Kaupinmäki
Modified: 2017-09-29 08:50 UTC (History)
1 user (show)

See Also:
Crash report or crash signature:

A set of test cases (14.09 KB, application/vnd.oasis.opendocument.text)
2014-06-13 19:51 UTC, Simo Kaupinmäki
A set of test cases (14.09 KB, application/vnd.oasis.opendocument.text)
2014-06-13 19:53 UTC, Simo Kaupinmäki
LibO 4.3 vs Word 2010 (148.53 KB, image/png)
2014-06-14 00:32 UTC, Yousuf Philips (jay) (retired)
A set of test cases (5.06 MB, application/vnd.oasis.opendocument.text)
2016-05-28 08:05 UTC, Simo Kaupinmäki

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Description Simo Kaupinmäki 2014-06-13 19:51:49 UTC
Created attachment 101005 [details]
A set of test cases

In some situations, a no-break space (U+00A0) or non-breaking hyphen (U+2011) prevents a valid line break after a normal hyphen (U+002D, U+2010) or dash (U+2013, U+2014) or soft hyphen (U+00AD) that occurs within the preceding word. Specifically, this only seems to happen if the preceding word is also the first word in the paragraph (which means that the issue is unlikely to emerge unless the paragraph begins with a long word or string and the line is rather short).

Reproducible: always
Found in LO (on Debian stable), (on Windows), and (on both Debian and Windows)

As a workaround, you could use a narrow no-break space (U+202F), a combination of word joiner (U+2060) and normal space (U+0020), or a combination of a regular hyphen (U+002D) and word joiner.

Note: this issue looks similar to bug 58477 but only occurs in a very specific situation. I also occurs on Windows, and in LO and, which are not affected by 58477.
Comment 1 Simo Kaupinmäki 2014-06-13 19:53:58 UTC
Created attachment 101007 [details]
A set of test cases
Comment 2 Yousuf Philips (jay) (retired) 2014-06-14 00:31:40 UTC
Confirmed in Linux Mint in 3.3.0, 4.2.4 and 4.3 beta.
Comment 3 Yousuf Philips (jay) (retired) 2014-06-14 00:32:12 UTC
Created attachment 101022 [details]
LibO 4.3 vs Word 2010
Comment 4 tommy27 2016-04-16 07:27:38 UTC Comment hidden (obsolete)
Comment 5 Simo Kaupinmäki 2016-05-28 07:59:08 UTC
The bug still affects LibO on both Linux (Debian Jessie backports) and Windows.

Build ID: 1:5.1.3-1~bpo8+1
CPU Threads: 1; OS Version: Linux 3.16; UI Render: default; 
Locale: fi-FI (fi_FI.utf8)

Build ID: 644e4637d1d8544fd9f56425bd6cec110e49301b
CPU Threads: 4; OS Version: Windows 6.1; UI Render: default; 
Locale: fi-FI (fi_FI)
Comment 6 Simo Kaupinmäki 2016-05-28 08:05:38 UTC
Created attachment 125339 [details]
A set of test cases
Comment 7 Xisco Faulí 2017-09-29 08:50:45 UTC
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