Commit: 8f38534300b4e24e0ef2c561721b11ff9667e3de
Author: Sergey Sharybin
Date: Mon Mar 29 14:42:52 2021 +0200
Branches: master
https://developer.blender.org/rB8f38534300b4e24e0ef2c561721b11ff9667e3de
Tracking: Avoid integer overflow in dopesheet update
Straightforward check to discard cases when dopesheet is being updated
for a movie clip which has no markers at all.
Possible bugfix for T86847.
===================================================================
M source/blender/blenkernel/intern/tracking.c
===================================================================
diff --git a/source/blender/blenkernel/intern/tracking.c
b/source/blender/blenkernel/intern/tracking.c
index d124922acd1..f3d6bc4a6e3 100644
--- a/source/blender/blenkernel/intern/tracking.c
+++ b/source/blender/blenkernel/intern/tracking.c
@@ -3251,6 +3251,11 @@ static void
tracking_dopesheet_calc_coverage(MovieTracking *tracking)
end_frame = max_ii(end_frame, track->markers[track->markersnr -
1].framenr);
}
+ if (start_frame > end_frame) {
+ /* There are no markers at all, nothing to calculate coverage from. */
+ return;
+ }
+
frames = end_frame - start_frame + 1;
/* this is a per-frame counter of markers (how many markers belongs to the
same frame) */
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