Setting up external diff tool triggers error "'Running external diff toool...' has encountered a problem."

[StefanHISE]

Version

6.8.0

Operating System

Windows

Eclipse version

2023-12

Bug description

In Eclipse under Preferences -> Version Control (Team) -> Git -> Diff/Merge -> enable 'Use external tool if configured by git or product' as shown in the following screenshot:

In my user .gitconfig configuration file I've added two entries to set Winmerge as the merge and diff tool:

In Eclipse double click an item with some changes in the 'Git Staging' tab to bring up the file diff.

Actual behavior

The following error popup shows up:

Expected behavior

Winmerge is opened, showing the diff of the selected file.

Alternatively, if there indeed is something wrong with the configuration, a more meaningful error message would be useful 'Index 1 out of bounds for length 1' doesn't really tell me much without looking into the EGit source-code.

Relevant log output

No response

Other information

Could this be related to this bug in the old bug tracker? https://bugs.eclipse.org/bugs/show_bug.cgi?id=580088
At least in comment 8, it seems to me that some special handling might be needed to support some of the default config settings which might not have been implemented yet in EGit: https://bugs.eclipse.org/bugs/show_bug.cgi?id=580088#c8