Merge pull request #2993 from amasad/2772

Fix #2772

packages/babel-core/test/fixtures/plugins/regression-2772/exec.js

@@ -1,7 +1,8 @@
 var code = multiline([
   "(function() {",
+  "  var bar = 'lol';",
   "  function foo(b){",
-  '    b === "lol";',
+  "    b === bar;",
   "    foo(b);",
   "  }",
   "})();",

packages/babel-traverse/src/path/introspection.js

@@ -313,7 +313,7 @@ export function _guessExecutionStatusRelativeToDifferentFunctions(targetFuncPare
   for (let path of referencePaths) {
     // if a reference is a child of the function we're checking against then we can
     // safelty ignore it
-    let childOfFunction = !!path.find(path => path === targetFuncPath);
+    let childOfFunction = !!path.find(path => path.node === targetFuncPath.node);
     if (childOfFunction) continue;
 
     let status = this._guessExecutionStatusRelativeTo(path);