add missing guard. fixes GR-22252

timfel · timfel · commit c77acff2c592 · 2020-04-07T15:35:40.000+02:00
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/iterator/PZipBuiltins.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/iterator/PZipBuiltins.java
@@ -61,7 +61,7 @@ Object doEmpty(@SuppressWarnings("unused") PZip self) {
             throw raise(PythonErrorType.StopIteration);
         }
 
-        @Specialization
+        @Specialization(guards = "!isEmpty(self.getIterators())")
         Object doNext(VirtualFrame frame, PZip self,
                         @Cached("create()") GetNextNode next) {
             Object[] iterators = self.getIterators();

Original file line number	Diff line number	Diff line change
`@@ -61,7 +61,7 @@ Object doEmpty(@SuppressWarnings("unused") PZip self) {`
`61`	`61`	`throw raise(PythonErrorType.StopIteration);`
`62`	`62`	`}`
`63`	`63`
`64`		`- @Specialization`
	`64`	`+ @Specialization(guards = "!isEmpty(self.getIterators())")`
`65`	`65`	`Object doNext(VirtualFrame frame, PZip self,`
`66`	`66`	`@Cached("create()") GetNextNode next) {`
`67`	`67`	`Object[] iterators = self.getIterators();`