Steps to reproduce

1. Create a DiffContext using DiffContext.Builder and don't set a maxLineLength (or set it to something short).
2. Call a a diff command using that diff context

Expected result:

Diff is streamed into callback like normal

Actual result:

DiffOutputHandler fails reading diff header because the max line length is too short.

Example:

scmService.getPullRequestCommandFactory(pullRequest)
        .diff(new PullRequestDiffCommandParameters.Builder().maxLineLength(100).build(), new AbstractDiffContentCallback(){});

Workaround

Set the maxLine length to something long enough to read the full paths involved.