so, I looked at this bug and it seems that only taking back change to auto.C "fixes" it But may be I just tested too little (in virtual Arch) full backtrace is big, but I think it crashes here: #6 MWindow::normalize_speed (this=this@entry=0x7ffe5099ab80, old_edl=0x62bf3d52dd40, new_edl=0x7a75402bbd50, edit_speed=edit_speed@entry=0) at mwindowedit.C:2705 old_keyframes = <optimized out> new_keyframes = 0x7a7538311830 old_auto = 0x0 new_plugin = <optimized out> plugin_start = <optimized out> orig_start = <optimized out> plugin_end = <optimized out> orig_end = <optimized out> old_plugin_set = <optimized out> new_plugin_set = 0x7a75382080a0 old_plugin = <optimized out> i = 0 old_size = <optimized out> new_size = <optimized out> n = <optimized out> old_speeds = <optimized out> old_speed = <optimized out> old_edit = <optimized out> new_speeds = <optimized out> new_speed = <optimized out> edit_plugins = 1 edit_autos = 1 edit_labels = 1 result = 1 first_track = 0 old_track = <optimized out> new_track = <optimized out> #7 0x000062befc37112a in MWindow::speed_after (this=0x7ffe5099ab80, done=done@entry=0, edit_speed=edit_speed@entry=0) at mwindowedit.C:2753 so *may be* old_auto being 0x0 causes crash ? Not sure where to put guard in this function yet ... ---------- Forwarded message --------- From: Cinelerra GG Bug Tracker <[email protected]> Date: Tue, Apr 8, 2025 at 6:03 AM Subject: Mentioned in [Cinelerra-GG 0000672]: Crash when using the speed curve To: <[email protected]> On 2025-04-08 03:03, PhyllisSmith mentioned you on: https://www.cinelerra-gg.org/bugtracker/view.php?id=672 @Lukas I think I have isolated the crash and reverted 3 files to a previously working version. BUT it does not make any sense why that would solve the problem AND I am not even sure that it solves all cases. However, I will create an older version AppImage with the change in for you to test when I boot that O/S desktop tomorrow. @Andrew-R Here is an exact set of minimum steps to create the problem. Start with a new bcast, i..e. CIN_CONFIG=/tmp/bcast5 bin/cin Just dismiss the note of the day window (x it gone) load media using replace current project turn on generate keyframes while tweaking drag chromakeyhsv to video bring up chromkeyhsv menu play a little and move the slider in the chromkeyhsv menu to get keyframes stop play, then move cursor and play a little to get another set of keyframes use View to turn on speed curve move cursor to between the 2 sets of keyframes in front of cursor, try to move speed curve it gets stuck and crashes THIS COMMIT CRASHES: commit 25e944875e181186eeb59a124c1822e5b55d2248 Author: Good Guy <[email protected]> Date: Fri Sep 4 09:17:01 2020 -0600 fix auto id 'that' blunder, tweak keyfrm popup speed undo THIS COMMIT SEEMS TO WORK: commit 22c6251d37911a11e322bf7518e6a992ea0bb6c7 Author: Good Guy <[email protected]> Date: Wed Sep 2 19:16:24 2020 -0600 add ids to auto/labels, fix awdw gui deadlock, fix fourier bfr bug, fix cache critical section, rework normalize_speed, fix delete_track gang bug So I reverted cinelerra keyframepopup.C, keyframepopup.h, and auto.C to the Sept 2, 2020 version since no further changes were made to those other than a comment.