diff --git a/ext/opcache/Optimizer/zend_inference.c b/ext/opcache/Optimizer/zend_inference.c
index da5bd46d99b..c75857610a0 100644
--- a/ext/opcache/Optimizer/zend_inference.c
+++ b/ext/opcache/Optimizer/zend_inference.c
@@ -3109,7 +3109,8 @@ static int zend_update_type_info(const zend_op_array *op_array,
 					UPDATE_SSA_TYPE(tmp, ssa_ops[i].op1_def);
 				} else {
 					/* invalid key type */
-					UPDATE_SSA_TYPE(t1, ssa_ops[i].op1_def);
+					tmp = (tmp & (MAY_BE_RC1|MAY_BE_RCN)) | (t1 & ~(MAY_BE_RC1|MAY_BE_RCN));
+					UPDATE_SSA_TYPE(tmp, ssa_ops[i].op1_def);
 				}
 				COPY_SSA_OBJ_TYPE(ssa_ops[i].op1_use, ssa_ops[i].op1_def);
 			}
diff --git a/ext/opcache/tests/ssa_bug_011.phpt b/ext/opcache/tests/ssa_bug_011.phpt
new file mode 100644
index 00000000000..58f39807fc6
--- /dev/null
+++ b/ext/opcache/tests/ssa_bug_011.phpt
@@ -0,0 +1,19 @@
+--TEST--
+Type inference warning
+--FILE--
+<?php
+function renderRawGraph(array $parents) {
+    $graph = array();
+    foreach ($parents as $p) {
+        foreach ($graph as $v) {
+            $graph[$v]['line'] = 1;
+        }
+        $graph[] = array(
+            'line' => 1,
+        );
+    }
+}
+?>
+OK
+--EXPECT--
+OK