JIT: Fixed memory leak

Fixes oss-fuzz #45981

Author: dstogov

ext/opcache/jit/zend_jit_helpers.c

@@ -2316,6 +2316,9 @@ static void ZEND_FASTCALL zend_jit_invalid_property_incdec(zval *container, cons
 	zend_throw_error(NULL,
 		"Attempt to increment/decrement property \"%s\" on %s",
 		property_name, zend_zval_type_name(container));
+	if (opline->op1_type == IS_VAR) {
+		zval_ptr_dtor_nogc(EX_VAR(opline->op1.var));
+	}
 }
 
 static void ZEND_FASTCALL zend_jit_invalid_property_assign(zval *container, const char *property_name)

ext/opcache/tests/jit/inc_obj_005.phpt

@@ -0,0 +1,19 @@
+--TEST--
+PRE_INC_OBJ: 005
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.jit_buffer_size=1M
+opcache.protect_memory=1
+--FILE--
+<?php
+json_encode($y)->y++;
+?>
+--EXPECTF--
+Warning: Undefined variable $y in %sinc_obj_005.php on line 2
+
+Fatal error: Uncaught Error: Attempt to increment/decrement property "y" on string in %sinc_obj_005.php:2
+Stack trace:
+#0 {main}
+  thrown in %sinc_obj_005.php on line 2