UI: Fix crash when region becomes too thin

2019-05-03 17:42:45 +02:00
parent 6ab7b38464
commit 712fe561d5
1 changed files with 6 additions and 0 deletions
--- a/source/blender/editors/interface/view2d_draw.c
+++ b/source/blender/editors/interface/view2d_draw.c
@@ -153,6 +153,12 @@ static void get_parallel_lines_draw_steps(const ParallelLinesSet *lines,
                                          float *r_first,
                                          uint *r_steps)
 {
+  if (region_start >= region_end) {
+    *r_first = 0;
+    *r_steps = 0;
+    return;
+  }
+
  BLI_assert(lines->distance > 0);
  BLI_assert(region_start <= region_end);