Properly resolve scope from switch statement - fixes T6762

packages/babel-plugin-transform-es2015-spread/test/fixtures/regression/T6761/actual.js

@@ -0,0 +1,10 @@
+function fn(){}
+
+var args = [1, 2, 3];
+var obj = {obj: {fn}};
+
+switch (true){
+    case true:
+        obj.obj.fn(...args);
+        break;
+}

packages/babel-plugin-transform-es2015-spread/test/fixtures/regression/T6761/expected.js

@@ -0,0 +1,12 @@
+var _obj$obj;
+
+function fn() {}
+
+var args = [1, 2, 3];
+var obj = { obj: { fn } };
+
+switch (true) {
+    case true:
+        (_obj$obj = obj.obj).fn.apply(_obj$obj, args);
+        break;
+}

packages/babel-plugin-transform-es2015-spread/test/fixtures/regression/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers-2", "transform-es2015-spread", "transform-es2015-parameters"]
+}

packages/babel-traverse/src/scope/index.js

@@ -741,14 +741,14 @@ export default class Scope {
   }) {
     let path = this.path;
 
-    if (path.isSwitchStatement()) {
-      path = this.getFunctionParent().path;
-    }
-
     if (!path.isBlockStatement() && !path.isProgram()) {
       path = this.getBlockParent().path;
     }
 
+    if (path.isSwitchStatement()) {
+      path = this.getFunctionParent().path;
+    }
+
     if (path.isLoop() || path.isCatchClause() || path.isFunction()) {
       t.ensureBlock(path.node);
       path = path.get("body");