style: Add writing mode dependency if special MozLength keywords are …

…used.
servo · Sep 14, 2017 · 1346be5 · 1346be5
1 parent b3ee1c7
commit 1346be5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/components/style/values/computed/length.rs b/components/style/values/computed/length.rs
@@ -862,6 +862,10 @@ impl ToComputedValue for specified::MozLength {
                 MozLength::LengthOrPercentageOrAuto(lopoa.to_computed_value(context))
             }
             specified::MozLength::ExtremumLength(ref ext) => {
+                debug_assert!(context.for_non_inherited_property.is_some(),
+                              "should check whether we're a non-inherited property");
+                context.rule_cache_conditions.borrow_mut()
+                    .set_writing_mode_dependency(context.builder.writing_mode);
                 MozLength::ExtremumLength(ext.clone())
             }
         }