23150 File Compare on empty .TXT file fails to complete

[chrisjj]

And uses a ton of CPU:





On Windows 7, FWIW.

[Aaron]

We would need more information to help track this down. Please email in a copy of your BCSupport.zip (Help menu -> Support; Export) to [email protected] along with a link back to this forum thread. If you restart your computer and then open a single tab and repeat the steps of comparing a blank file, does this reproduce?

[chrisjj]

We would need more information to help track this down.

Does it not happen for you?

Please email in a copy of your BCSupport.zip (Help menu -> Support; Export) to [email protected] along with a link back to this forum thread.

Done.

If you restart your computer and then open a single tab and repeat the steps of comparing a blank file, does this reproduce?

Yes.

[Chris]

Thank you for sharing your settings. This is a bug in BC's implementation of the Patience Diff algorithm. If one file is empty, the comparison gets stuck in an infinite loop. It's on the bug list to be fixed.

The only fix in the current version is to change the alignment algorithm used in the Text Compare. In the Home View, from the Sessions list, select New > Text Compare. Click Edit Defaults. In the Alignment tab, change Patience Diff alignment to Standard alignment or Myers O(ND) alignment.

[chrisjj]

Thanks.

It's on the bug list to be fixed.

Meaning it got added since your response to my report?

[Chris]

It was already on the bug list prior to your report. It only happens when Patience Diff algorithm is selected, which isn't the default alignment algorithm. The settings you sent by email were helpful in determining that it was a known bug rather than a bug elsewhere in the code.

[chrisjj]

Thanks.

It was already on the bug list prior to your report.

OK. Then it would have been useful to have received that info, instead of "We would need more information to help track this down."

Is this list of known bugs available to users? It would avoid me wasting time in reporting known bugs. I can't find such a list on web.

[Aaron]

Hello,

We didn't know what issue you were hitting until we were able to compare with your current settings. Once found, we linked it to the existing issue.

Our tracker database is private. The developers use it, and it contains private information to help them reproduce test cases, etc.

[chrisjj]

Thanks.

[Chris]

The patience diff alignment bug you reported is fixed in Beyond Compare 4.3.

https://www.scootersoftware.com/download.php

[chrisjj]

Verified. Thanks for letting me know and thanks for the fix!