Prevent crash when setting up a stencil-based clip

Bug #8177690

Clear the layers before we setup the stencil to avoid dereferencing
the recently deleted rects.

Change-Id: I5dce5f965672f276f9490636d85b6018d3ab9422

1 files changed, 5 insertions, 2 deletions

diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 08e2332df80b..62f268dab291 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -1179,6 +1179,10 @@ void OpenGLRenderer::clearLayerRegions() {
 
             delete bounds;
         }
+        // We must clear the list of dirty rects before we
+        // call setupDraw() to prevent stencil setup to do
+        // the same thing again
+        mLayers.clear();
 
         setupDraw(false);
         setupDrawColor(0.0f, 0.0f, 0.0f, 1.0f);
@@ -1195,9 +1199,8 @@ void OpenGLRenderer::clearLayerRegions() {
         for (uint32_t i = 0; i < count; i++) {
             delete mLayers.itemAt(i);
         }
+        mLayers.clear();
     }
-
-    mLayers.clear();
 }
 
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