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1.7 TortoiseMerge word wrap can cause crash

From: Stein Somers <ssomers_at_opnet.com>
Date: Fri, 19 Aug 2011 17:54:07 +0200

The word wrap feature in TortoiseMerge is welcome, but sometimes it bites. I
haven't been able to reproduce it exactly. My gut feeling as a C/C++ developer
is that some memory is not initialized. I'm on build 21850 now.

The steps to reproduce:
1. Open some SVN diff, through various ways.
2. Toggle the word wrap button (Ctrl-P).

There are two cases now:
2.1. About 2 times out of 3, all is fine. TortoiseMerge shows the top of the
files, and further toggling will work too. Close the window and open it again,
and all is fine. Do something else or open a second window, and you risk
switching over to case 2.2

2.2 Sometimes, TortoiseMerge scrolls beyond the bottom of the files, showing a
blank screen. You can scroll back up fine. Toggling the word wrap button again
scrolls down again, every time.

3. Only if you got into case 2.2, and there are whitespace differences between
the files, and you switch the radio buttons to ignore or compare whitespace,
there's an access violation in TortoiseMerge.exe. With debugging symbols
extracted, according to the Visual Studio 2005 debugger, the "this" pointer is
null in CMainFrame::OnViewComparewhitespaces. Top of the stack trace:

        TortoiseMerge.exe!CMainFrame::LoadViews(int line=416) Line 600 + 0x2e bytes
          TortoiseMerge.exe!CMainFrame::OnViewComparewhitespaces() Line 2338 + 0xb bytes

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Received on 2011-08-19 17:54:18 CEST

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