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-rw-r--r--components/style/values/specified/box.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/components/style/values/specified/box.rs b/components/style/values/specified/box.rs
index 7fd5a250e06..1fea857d3e8 100644
--- a/components/style/values/specified/box.rs
+++ b/components/style/values/specified/box.rs
@@ -454,10 +454,11 @@ impl ToCss for Display {
where
W: fmt::Write,
{
+ #[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
debug_assert_ne!(
self.inside(),
DisplayInside::Flow,
- "`flow` never appears in `display` computed value"
+ "`flow` fears in `display` computed value"
);
let outside = self.outside();
let inside = match self.inside() {