diff --git a/Zend/tests/type_coercion/gh22112.phpt b/Zend/tests/type_coercion/gh22112.phpt
new file mode 100644
index 000000000000..84fdc393a828
--- /dev/null
+++ b/Zend/tests/type_coercion/gh22112.phpt
@@ -0,0 +1,35 @@
+--TEST--
+GH-22112 (Assertion failure when error handler throws during NaN to bool/string coercion at function entry)
+--FILE--
+<?php
+
+set_error_handler(function ($errno, $errstr) {
+    throw new Exception($errstr);
+});
+
+function take_bool(bool $v) {
+    echo "take_bool entered\n";
+}
+
+function take_string(string $v) {
+    echo "take_string entered\n";
+}
+
+$nan = fdiv(0, 0);
+
+try {
+    take_bool($nan);
+} catch (Exception $e) {
+    echo "bool: ", $e->getMessage(), "\n";
+}
+
+try {
+    take_string($nan);
+} catch (Exception $e) {
+    echo "string: ", $e->getMessage(), "\n";
+}
+
+?>
+--EXPECT--
+bool: unexpected NAN value was coerced to bool
+string: unexpected NAN value was coerced to string
diff --git a/Zend/zend_API.c b/Zend/zend_API.c
index 538c02f0395e..e874c4a5bbd7 100644
--- a/Zend/zend_API.c
+++ b/Zend/zend_API.c
@@ -537,6 +537,9 @@ ZEND_API bool ZEND_FASTCALL zend_parse_arg_bool_weak(const zval *arg, bool *dest
 			return 0;
 		}
 		*dest = zend_is_true(arg);
+		if (UNEXPECTED(EG(exception))) {
+			return 0;
+		}
 	} else {
 		return 0;
 	}
@@ -762,6 +765,9 @@ ZEND_API bool ZEND_FASTCALL zend_parse_arg_str_weak(zval *arg, zend_string **des
 			return 0;
 		}
 		convert_to_string(arg);
+		if (UNEXPECTED(EG(exception))) {
+			return 0;
+		}
 		*dest = Z_STR_P(arg);
 	} else if (UNEXPECTED(Z_TYPE_P(arg) == IS_OBJECT)) {
 		zend_object *zobj = Z_OBJ_P(arg);