Fix layout panic in rounded rectangle

Fixes #1216 both by hardening the rounded rectangle against negative size and by ensuring that the negative size doesn't occur in the first place for this case.

1 files changed, 5 insertions, 0 deletions

diff --git a/library/src/layout/flow.rs b/library/src/layout/flow.rs
index a21f8142..5e01f51d 100644
--- a/library/src/layout/flow.rs
+++ b/library/src/layout/flow.rs
@@ -243,6 +243,11 @@ impl<'a> FlowLayouter<'a> {
         block: &Content,
         styles: StyleChain,
     ) -> SourceResult<()> {
+        // Skip directly if regino is already full.
+        if self.regions.is_full() {
+            self.finish_region()?;
+        }
+
         // Placed elements that are out of flow produce placed items which
         // aren't aligned later.
         if let Some(placed) = block.to::<PlaceElem>() {