I've seen this, I even wrote up a bug and sent it to tm-bugs(a)micromates.com but it bounced (is that email correct?). Below is my original bug report. Steps to reproduce: Give detailed steps on how to reproduce the problem. Start from scratch (e.g. “1. Create a new document, 2. Change language to Ruby, 3. …”). 1. (optional) Quit Textmate, Launch Textmate 2. Create new document (Command + N) 3. Insert some blank lines (Enter 5x) 4. Create a multiple caret selection 1. Select some or all lines (Command + A) 2. Switch to multiple caret mode (Press Option) 5. Run `Filter Through Command` with Command: `seq 1 5` and Result: `Replace Selection` (Command + Shift + \\) aka: (Command + |) 6. Everything should be fine. Now lets try again now that there's text on each line. 7. Create a multiple caret selection (again) 1. Select some or all lines (Command + A) 2. Switch to multiple caret mode (Press Option) 8. Run `Filter Through Command` with Command: `seq 1 5` and Result: `Replace Selection` (Command + Shift + \\) 9. TextMate is non-responsive Expected result: Previously this inserted the results on the selected lines. Actual result: Lines are not inserted, instead the app becomes non-responsive Environment: OS X version: Yosemite 10.10.4 TextMate version: 2.0-beta.7.7 Language: My default new format is markdown, first observed in an HTML(djengo) document. Seems like a new bug, since last beta release. On Wed, Aug 26, 2015 at 1:42 PM, feek <feekdiv(a)gmail.com> wrote: -- Graham P Heath