[X2Go-Commits] [pale-moon] 100/294: Add some tests for distinguishability of unions

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x2go pushed a commit to branch upstream/28.5.0
in repository pale-moon.

commit 7d411777a35aedc5cd5f31e58e3d3468a20320b8
Author: JustOff <Off.Just.Off at gmail.com>
Date:   Wed Mar 13 19:01:09 2019 +0200

    Add some tests for distinguishability of unions
---
 dom/bindings/parser/WebIDL.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dom/bindings/parser/WebIDL.py b/dom/bindings/parser/WebIDL.py
index 7d06dbce..8c71333 100644
--- a/dom/bindings/parser/WebIDL.py
+++ b/dom/bindings/parser/WebIDL.py
@@ -2321,8 +2321,10 @@ class IDLNullableType(IDLParameterizedType):
         return self
 
     def isDistinguishableFrom(self, other):
-        if (other.nullable() or (other.isUnion() and other.hasNullableType) or
-            other.isDictionary()):
+        if (other.nullable() or
+            other.isDictionary() or
+            (other.isUnion() and
+             (other.hasNullableType or other.hasDictionaryType()))):
             # Can't tell which type null should become
             return False
         return self.inner.isDistinguishableFrom(other)

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