Fixed bug #79657

Throwing an exception should count as an initialization for this
purpose.

1 files changed, 42 insertions, 0 deletions

diff --git a/Zend/tests/bug79657.phpt b/Zend/tests/bug79657.phpt
new file mode 100644
index 0000000000..fb2ccab3e3
--- /dev/null
+++ b/Zend/tests/bug79657.phpt
@@ -0,0 +1,42 @@
+--TEST--
+Bug #79657: "yield from" hangs when invalid value encountered
+--FILE--
+<?php
+
+function throwException(): iterable
+{
+    throw new Exception();
+}
+
+function loop(): iterable
+{
+    $callbacks = [
+        function () {
+            yield 'first';
+        },
+        function () {
+            yield from throwException();
+        }
+    ];
+
+    foreach ($callbacks as $callback) {
+        yield from $callback();
+    }
+}
+
+function get(string $first, int $second): array
+{
+    return [];
+}
+
+get(...loop());
+
+?>
+--EXPECTF--
+Fatal error: Uncaught Exception in %s:%d
+Stack trace:
+#0 %s(%d): throwException()
+#1 %s(%d): {closure}()
+#2 %s(%d): loop()
+#3 {main}
+  thrown in %s on line %d