From 77289715176011cd70009ad452faf33599e51007 Mon Sep 17 00:00:00 2001
From: James Henry <james@henry.sc>
Date: Mon, 22 Aug 2016 19:41:01 +0100
Subject: [PATCH] Fix: Check for arguments property on NewExpression (fixes
 #60)

---
 lib/ast-converter.js                          |   2 +-
 .../basics/new-without-parens.result.js       | 293 ++++++++++++++++++
 .../fixtures/basics/new-without-parens.src.js |   2 +
 3 files changed, 296 insertions(+), 1 deletion(-)
 create mode 100644 tests/fixtures/basics/new-without-parens.result.js
 create mode 100644 tests/fixtures/basics/new-without-parens.src.js

diff --git a/lib/ast-converter.js b/lib/ast-converter.js
index 03c1a73..528b180 100644
--- a/lib/ast-converter.js
+++ b/lib/ast-converter.js
@@ -1533,7 +1533,7 @@ module.exports = function(ast, extra) {
                     assign(result, {
                         type: "NewExpression",
                         callee: convertChild(node.expression),
-                        arguments: node.arguments.map(convertChild)
+                        arguments: (node.arguments) ? node.arguments.map(convertChild) : []
                     });
                 }
                 break;
diff --git a/tests/fixtures/basics/new-without-parens.result.js b/tests/fixtures/basics/new-without-parens.result.js
new file mode 100644
index 0000000..1d7c82d
--- /dev/null
+++ b/tests/fixtures/basics/new-without-parens.result.js
@@ -0,0 +1,293 @@
+module.exports = {
+    "type": "Program",
+    "loc": {
+        "start": {
+            "line": 1,
+            "column": 0
+        },
+        "end": {
+            "line": 2,
+            "column": 6
+        }
+    },
+    "range": [
+        0,
+        23
+    ],
+    "body": [
+        {
+            "type": "FunctionDeclaration",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 0
+                },
+                "end": {
+                    "line": 1,
+                    "column": 16
+                }
+            },
+            "range": [
+                0,
+                16
+            ],
+            "id": {
+                "type": "Identifier",
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 9
+                    },
+                    "end": {
+                        "line": 1,
+                        "column": 10
+                    }
+                },
+                "range": [
+                    9,
+                    10
+                ],
+                "name": "X"
+            },
+            "generator": false,
+            "expression": false,
+            "params": [],
+            "body": {
+                "type": "BlockStatement",
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 14
+                    },
+                    "end": {
+                        "line": 1,
+                        "column": 16
+                    }
+                },
+                "range": [
+                    14,
+                    16
+                ],
+                "body": []
+            }
+        },
+        {
+            "type": "ExpressionStatement",
+            "loc": {
+                "start": {
+                    "line": 2,
+                    "column": 0
+                },
+                "end": {
+                    "line": 2,
+                    "column": 6
+                }
+            },
+            "range": [
+                17,
+                23
+            ],
+            "expression": {
+                "type": "NewExpression",
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 0
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 5
+                    }
+                },
+                "range": [
+                    17,
+                    22
+                ],
+                "callee": {
+                    "type": "Identifier",
+                    "loc": {
+                        "start": {
+                            "line": 2,
+                            "column": 4
+                        },
+                        "end": {
+                            "line": 2,
+                            "column": 5
+                        }
+                    },
+                    "range": [
+                        21,
+                        22
+                    ],
+                    "name": "X"
+                },
+                "arguments": []
+            }
+        }
+    ],
+    "sourceType": "script",
+    "tokens": [
+        {
+            "type": "Keyword",
+            "value": "function",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 0
+                },
+                "end": {
+                    "line": 1,
+                    "column": 8
+                }
+            },
+            "range": [
+                0,
+                8
+            ]
+        },
+        {
+            "type": "Identifier",
+            "value": "X",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 9
+                },
+                "end": {
+                    "line": 1,
+                    "column": 10
+                }
+            },
+            "range": [
+                9,
+                10
+            ]
+        },
+        {
+            "type": "Punctuator",
+            "value": "(",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 11
+                },
+                "end": {
+                    "line": 1,
+                    "column": 12
+                }
+            },
+            "range": [
+                11,
+                12
+            ]
+        },
+        {
+            "type": "Punctuator",
+            "value": ")",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 12
+                },
+                "end": {
+                    "line": 1,
+                    "column": 13
+                }
+            },
+            "range": [
+                12,
+                13
+            ]
+        },
+        {
+            "type": "Punctuator",
+            "value": "{",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 14
+                },
+                "end": {
+                    "line": 1,
+                    "column": 15
+                }
+            },
+            "range": [
+                14,
+                15
+            ]
+        },
+        {
+            "type": "Punctuator",
+            "value": "}",
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 15
+                },
+                "end": {
+                    "line": 1,
+                    "column": 16
+                }
+            },
+            "range": [
+                15,
+                16
+            ]
+        },
+        {
+            "type": "Keyword",
+            "value": "new",
+            "loc": {
+                "start": {
+                    "line": 2,
+                    "column": 0
+                },
+                "end": {
+                    "line": 2,
+                    "column": 3
+                }
+            },
+            "range": [
+                17,
+                20
+            ]
+        },
+        {
+            "type": "Identifier",
+            "value": "X",
+            "loc": {
+                "start": {
+                    "line": 2,
+                    "column": 4
+                },
+                "end": {
+                    "line": 2,
+                    "column": 5
+                }
+            },
+            "range": [
+                21,
+                22
+            ]
+        },
+        {
+            "type": "Punctuator",
+            "value": ";",
+            "loc": {
+                "start": {
+                    "line": 2,
+                    "column": 5
+                },
+                "end": {
+                    "line": 2,
+                    "column": 6
+                }
+            },
+            "range": [
+                22,
+                23
+            ]
+        }
+    ]
+};
diff --git a/tests/fixtures/basics/new-without-parens.src.js b/tests/fixtures/basics/new-without-parens.src.js
new file mode 100644
index 0000000..fd30dda
--- /dev/null
+++ b/tests/fixtures/basics/new-without-parens.src.js
@@ -0,0 +1,2 @@
+function X () {}
+new X;
\ No newline at end of file