Re: [PATCH 1/2] line-log: fix assertion error

SZEDER Gábor [off-list ref] writes:

  - When a commit modifies an interesting path, the line-log machinery
    first checks which diff range (i.e. hunk) modify any line ranges.
    This is done in diff_ranges_filter_touched(), where the outer loop
    iterates over the diff ranges, and in each iteration the inner
    loop advances the line ranges supposedly until the current line
    range ends at or after the current diff range starts, and then the
    current diff and line ranges are checked for overlap.
...
    Fix that loop condition in diff_ranges_filter_touched() to not
    treat 'end' as part of the line range.

  - With the above fix the assertion error is gone... but, alas, we
    now get stuck in an endless loop!
...
    Fix this condition in range_set_difference() to not treat 'end' as
    part of the line range.

  - With the above fix the endless loop is gone... but, alas, the
    output is now wrong, as it shows both line ranges for HEAD, even
    though the first line range is not modified by that commit:
...
    Fix this condition to not treat 'end' as part of the line range,
    just like in the previous cases.

After all this the command in the above example finally finishes and
produces the right output:

What a lengthy journey X-<.

Thanks for an amusing description.