Support recovery for new without class name

grammar/php7.y

@@ -667,6 +667,7 @@ name:
 class_name_reference:
       class_name                                            { $$ = $1; }
     | new_variable                                          { $$ = $1; }
+    | error                                                 { $$ = Expr\Error[]; $this->errorState = 2; }
 ;
 
 class_name_or_var:

test/code/parser/errorHandling/recovery.test

@@ -279,4 +279,49 @@ array(
             )
         )
     )
+)
+-----
+<?php
+new T
+-----
+Syntax error, unexpected EOF from 2:6 to 2:6
+array(
+    0: Expr_New(
+        class: Name(
+            parts: array(
+                0: T
+            )
+        )
+        args: array(
+        )
+    )
+)
+-----
+<?php
+new
+-----
+!!php7
+Syntax error, unexpected EOF from 2:4 to 2:4
+array(
+    0: Expr_New(
+        class: Expr_Error(
+        )
+        args: array(
+        )
+    )
+)
+-----
+<?php
+$foo instanceof
+-----
+!!php7
+Syntax error, unexpected EOF from 2:16 to 2:16
+array(
+    0: Expr_Instanceof(
+        expr: Expr_Variable(
+            name: foo
+        )
+        class: Expr_Error(
+        )
+    )
 )

test/code/parser/expr/newWithoutClass.test

@@ -3,6 +3,21 @@ New without a class
 <?php
 new;
 -----
+!!php5
 Syntax error, unexpected ';' from 2:4 to 2:4
 array(
 )
+-----
+<?php
+new;
+-----
+!!php7
+Syntax error, unexpected ';' from 2:4 to 2:4
+array(
+    0: Expr_New(
+        class: Expr_Error(
+        )
+        args: array(
+        )
+    )
+)