Commit: 22b564f93ef4bd7c981a7986addf5fe466954592
Author: Dalai Felinto
Date:   Thu Apr 23 10:59:35 2015 -0300
Branches: master
https://developer.blender.org/rB22b564f93ef4bd7c981a7986addf5fe466954592

Fix T44498 - Blender crashes in some files after render slots fix

This is a temporary fix until I get to investigate it more carefully.
It will help if the report could include the steps to reproduce it
besides the buggy file.

Note: RenderResult should *always* have at least a valid RenderView,
which is not what happens here.

===================================================================

M       source/blender/blenkernel/intern/image.c

===================================================================

diff --git a/source/blender/blenkernel/intern/image.c 
b/source/blender/blenkernel/intern/image.c
index d743c06..b9a76a1 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -3575,10 +3575,18 @@ static ImBuf *image_get_render_result(Image *ima, 
ImageUser *iuser, void **lock_
        if (rv == NULL)
                rv = rres.views.first;
 
-       /* this gives active layer, composite or sequence result */
-       rect = (unsigned int *)rv->rect32;
-       rectf = rv->rectf;
-       rectz = rv->rectz;
+       if (rv != NULL) {
+               /* this gives active layer, composite or sequence result */
+               rect = (unsigned int *)rv->rect32;
+               rectf = rv->rectf;
+               rectz = rv->rectz;
+       }
+       else {
+               /* XXX This should never happen, yet it does - T44498
+            * I'm waiting to investigate more, but meanwhile this fix
+            * the immediate issue */
+               rect = NULL;
+       }
        dither = iuser->scene->r.dither_intensity;
 
        /* combined layer gets added as first layer */

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