==== SUMMARY Crashes when trying to revert changes after "Time Remapping" alias Speed Ramp. ==== STEPS TO REPRODUCE [0. Load existing profile.] 1. Apply speed ramp to clip 2. Make some time changes 3. De-select clip and undo changes via CTRL+Z ==== OBSERVED RESULT Problem signature: Problem Event Name: APPCRASH Application Name: kdenlive.exe Application Version: 0.0.0.0 Application Timestamp: 00000000 Fault Module Name: libmlt++-7.dll Fault Module Version: 0.0.0.0 Fault Module Timestamp: 00000000 Exception Code: c0000005 Exception Offset: 000000000000939b OS Version: 6.1.7601.2.1.0.256.48 Locale ID: 1031 Additional Information 1: d99f Additional Information 2: d99fe4f86dd04d2d5b3aec01d3dc19f1 Additional Information 3: ea16 Additional Information 4: ea16c338e91f971974e5362c820ef98e ==== EXPECTERED RESULT When the very first recorded history/state of the project is reached do nothing even if I though I continue to press CTRL+Z. ==== SOFTWARE/OS VERSIONS Windows: 7 ==== ADDITIONAL INFORMATION Have the impression that kdenlive tried to go "before" the very first state like "state -1" since I think I already saw the very first state reemerging in the timeline right before the crash while hitting multiple times CTRL+Z.
Thank you for reporting. I can confirm the crash following your steps (tested with 23.08.4).
I checked with the latest master (commit 2640a1d21b). The crash is gone when doing undo with ctrl+z. But if I select an undo step and click on the clip the time-remap effect doesn’t appear in the effect stack anymore.