== Sequencer ==

This fixes:
[#11745] Blender crashes when changing Scenes on Sequencer`s Strips

containing:

- last_seq was set to null by scene-render
- button handling wasn't very robust (didn't check for null)
- REDRAWBUTSSCENE was missing

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/src/sequence.c b/source/blender/src/sequence.c
index 6ba53ff9b5e..1aca097e373 100644
--- a/source/blender/src/sequence.c
+++ b/source/blender/src/sequence.c
@@ -1756,6 +1756,7 @@ static void do_build_seq_ibuf(Sequence * seq, TStripElem *se, int cfra,
 		}
 	} else if(seq->type == SEQ_SCENE) {	// scene can be NULL after deletions
 		int oldcfra = CFRA;
+		Sequence * oldseq = get_last_seq();
 		Scene *sce= seq->scene, *oldsce= G.scene;
 		Render *re;
 		RenderResult rres;
@@ -1834,6 +1835,7 @@ static void do_build_seq_ibuf(Sequence * seq, TStripElem *se, int cfra,
 			if((G.f & G_PLAYANIM)==0) /* bad, is set on do_render_seq */
 				waitcursor(0);
 			CFRA = oldcfra;
+			set_last_seq(oldseq);
 
 			copy_to_ibuf_still(seq, se);