[Libreoffice-bugs] [Bug 126071] New: Assertion failure in offline help viewer when searching for string starting or ending in non-alphanumeric character

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=126071

            Bug ID: 126071
           Summary: Assertion failure in offline help viewer when
                    searching for string starting or ending in
                    non-alphanumeric character
           Product: LibreOffice
           Version: 6.4.0.0.alpha0+ Master
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Keywords: haveBacktrace
          Severity: normal
          Priority: low
         Component: framework
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: kelemeng at ubuntu.com
            Blocks: 105537

Created attachment 152373
  --> https://bugs.documentfoundation.org/attachment.cgi?id=152373&action=edit
Backtrace of the assertion error

If I try to search for a string that ends with a dot the offline help viewer
crashes with an assertion error. 
In the non debug build I get a "There is no such topic" dialog when doing the
same.

To reproduce:
1. Open the offline help browser.
2. Go to the Search tab.
3. Enter "foo." and press the Find button.

The console shows this output:

soffice.bin: /home/gabor/src/core/sal/rtl/strtmpl.cxx:1378: void
rtl_uString_newFromSubString(rtl_uString**, const rtl_uString*, sal_Int32,
sal_Int32): Assertion `false' failed.

Happens in:
Version: 6.4.0.0.alpha0+
Build ID: ab5f341efd144adb6b7d0e00fece76a2153acd10
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: hu-HU (hu_HU.UTF-8); UI-Language: en-US
Calc: threaded

There is no assertion error when searching for "foo" or "foo.a" but there is
one if searching for ".foo". 
Also this happens with basically any non alphanumeric characters at the
beginning or end of the string: .,"+-%=?! all can reproduce the problematic
behavior.


Referenced Bugs:

https://bugs.documentfoundation.org/show_bug.cgi?id=105537
[Bug 105537] [META] Assertion failed crashes
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