Fix T68018: Crash on building movie proxy

Skip building proxy if directory can not be created.

Crash happens, when setting custom dir to location of source file itself.
This results in attempt to create directory with the same name as source file.

Differential Revision: https://developer.blender.org/D6148
Reviewed By: sergey

1 files changed, 9 insertions, 4 deletions

diff --git a/source/blender/blenkernel/intern/sequencer.c b/source/blender/blenkernel/intern/sequencer.c
index 26dd9aab511..9f7dc8444ed 100644
--- a/source/blender/blenkernel/intern/sequencer.c
+++ b/source/blender/blenkernel/intern/sequencer.c
@@ -2093,7 +2093,7 @@ static int seq_proxy_context_count(Sequence *seq, Scene *scene)
   return num_views;
 }
 
-void BKE_sequencer_proxy_rebuild_context(Main *bmain,
+bool BKE_sequencer_proxy_rebuild_context(Main *bmain,
                                          Depsgraph *depsgraph,
                                          Scene *scene,
                                          Sequence *seq,
@@ -2138,9 +2138,6 @@ void BKE_sequencer_proxy_rebuild_context(Main *bmain,
 
     context->view_id = i; /* only for images */
 
-    link = BLI_genericNodeN(context);
-    BLI_addtail(queue, link);
-
     if (nseq->type == SEQ_TYPE_MOVIE) {
       StripAnim *sanim;
 
@@ -2155,8 +2152,16 @@ void BKE_sequencer_proxy_rebuild_context(Main *bmain,
                                                                 context->overwrite,
                                                                 file_list);
       }
+      if (!context->index_context) {
+        MEM_freeN(context);
+        return false;
+      }
     }
+
+    link = BLI_genericNodeN(context);
+    BLI_addtail(queue, link);
   }
+  return true;
 }
 
 void BKE_sequencer_proxy_rebuild(SeqIndexBuildContext *context,