Bug 41738

Summary: EDITING Regex Find & Replace foo[^\[:alpha:\]] causes Writer to become unresponsive
Product: LibreOffice Reporter: Christopher M. Penalver <christopher.m.penalver>
Component: UIAssignee: Eike Rathke <erack>
Status: RESOLVED FIXED QA Contact:
Severity: major    
Priority: medium CC: LibreOffice
Version: 3.3.0 release   
Hardware: All   
OS: All   
Whiteboard: ProposedEasyHack, TopicUI
i915 platform: i915 features:

Description Christopher M. Penalver 2011-10-12 19:49:55 UTC 
Downstream bug may be found at:

https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/669849

1) lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10

2) apt-cache policy libreoffice-writer
libreoffice-writer:
  Installed: 1:3.4.3-3ubuntu2
  Candidate: 1:3.4.3-3ubuntu2
  Version table:
 *** 1:3.4.3-3ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
        100 /var/lib/dpkg/status

3) What is expected to happen in LibreOffice Writer via the Terminal:

cd ~/Desktop && lowriter -nologo

Ctrl+F -> Search bar box foo[^\[:alpha:\]] -> click More Options button -> checked Regular expressions checkbox -> clicked Find button

and it fails quickly and gracefully.

4) What happens instead is Writer becomes and remains unresponsive.
Comment 1 Rainer Bielefeld Retired 2011-10-12 23:52:19 UTC 
[Reproducible] with Server installation of Master "LibO-dev 3.5.0 – WIN7 Home Premium (64bit) English UI [(Build ID:  d3d1481-3f8994a-2ba0a9f)]" (110909)

Also [Reproducible] with "LibreOffice 3.4.3  - WIN7 Home Premium (64bit) German UI [OOO340m1 (Build:302)]" CALC
Comment 2 Karl Koehler 2011-11-05 22:18:00 UTC 
This may be simplified: regex-search for

[[:\]

The following (inline) patch avoids the infinite loop, by advancing the starting point if we fall into the [: a second time. 


--- a/regexp/source/reclass.cxx
+++ b/regexp/source/reclass.cxx
@@ -1255,6 +1255,7 @@ Regexpr::regex_compile()
         break;
       } else {
         p = p1+1;
+        p1 ++;
         last_char = (sal_Unicode)':';
         set_list_bit(last_char, b);
       }

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