From fd7ac251084746a24cbcbb66bd5d9d49c9e7cee2 Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@googlemail.com>
Date: Sun, 29 Jan 2017 21:56:21 +0100
Subject: [PATCH] Throw if pretty-printing Error node

---
 lib/PhpParser/PrettyPrinter/Standard.php |  4 ++++
 test/PhpParser/PrettyPrinterTest.php     | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/lib/PhpParser/PrettyPrinter/Standard.php b/lib/PhpParser/PrettyPrinter/Standard.php
index a6118ecd..d8e530f0 100644
--- a/lib/PhpParser/PrettyPrinter/Standard.php
+++ b/lib/PhpParser/PrettyPrinter/Standard.php
@@ -485,6 +485,10 @@ class Standard extends PrettyPrinterAbstract
 
     // Other
 
+    protected function pExpr_Error(Expr\Error $node) {
+        throw new \LogicException('Cannot pretty-print AST with Error nodes');
+    }
+
     protected function pExpr_Variable(Expr\Variable $node) {
         if ($node->name instanceof Expr) {
             return '${' . $this->p($node->name) . '}';
diff --git a/test/PhpParser/PrettyPrinterTest.php b/test/PhpParser/PrettyPrinterTest.php
index e316744b..f5a6bfce 100644
--- a/test/PhpParser/PrettyPrinterTest.php
+++ b/test/PhpParser/PrettyPrinterTest.php
@@ -183,4 +183,14 @@ class PrettyPrinterTest extends CodeTestAbstract
             [new DNumber(-\NAN), '\NAN'],
         ];
     }
+
+    /**
+     * @expectedException \LogicException
+     * @expectedExceptionMessage Cannot pretty-print AST with Error nodes
+     */
+    public function testPrettyPrintWithError() {
+        $stmts = [new Expr\PropertyFetch(new Expr\Variable('a'), new Expr\Error())];
+        $prettyPrinter = new PrettyPrinter\Standard;
+        $prettyPrinter->prettyPrint($stmts);
+    }
 }