Commits on Sep 18, 2018

1. Call `ensure_no_corner_overlap()` to legalize border radii in …

   `ClipItem::new_box_shadow()`.
   
   If no blur is present, `DisplayListFlattener::add_box_shadow()` calls
   `ClipItem::new_rounded_rect()` in its fast path, which calls
   `ensure_no_corner_overlap()`. However, in the slow path, which is used when
   blur is present, `ClipItem::new_box_shadow()` is called instead. Prior to this
   patch, `ClipItem::new_box_shadow()` neglected to call
   `ensure_no_corner_overlap()`. This is why the bug manifested itself only when
   blur was present.
   
   Closes #2581.

   

   pcwalton committed Sep 18, 2018

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