Parent scope BlockStatement incorrectly resolved from inside SwitchStatement (T6761)

[babel-bot]

Issue originally made by @loganfsmyth

Input code

function fn(...args){
    console.log(args);
}

var args = [1, 2, 3];
var obj = {
    obj: {fn}
};

switch (true){
    case true:
        obj.obj.fn(...args);
        break;
}

Description

Regression from https://phabricator.babeljs.io/T3051

Output:

TypeError: main.js: Cannot read property '0' of undefined
    at Function.get (<babel>/packages/babel-traverse/lib/path/index.js:89:31)
    at NodePath.unshiftContainer (<babel>/packages/babel-traverse/lib/path/modification.js:244:33)
    at Scope.push (<babel>/packages/babel-traverse/lib/scope/index.js:1029:41)
    at Scope.maybeGenerateMemoised (<babel>/packages/babel-traverse/lib/scope/index.js:469:27)
    at PluginPass.CallExpression (<babel>/packages/babel-plugin-transform-es2015-spread/lib/index.js:116:28)
    at newFn (<babel>/packages/babel-traverse/lib/visitors.js:276:19)
    at NodePath._call <babel>/packages/babel-traverse/lib/path/context.js:74:18)
    at NodePath.call (<babel>/packages/babel-traverse/lib/path/context.js:46:17)
    at NodePath.visit (<babel>/packages/babel-traverse/lib/path/context.js:104:12)
    at TraversalContext.visitQueue (<babel>/packages/babel-traverse/lib/context.js:153:16)

[babel-bot]

Comment originally made by @loganfsmyth

PR: #3133

[babel-bot]

Comment originally made by @loganfsmyth

@prewk This has been fixed in babel-traverse@6.3.14, so if you make sure your deps are fully updated, you should be set.

[babel-bot]

Comment originally made by @prewk

Fantastic, thank you.

[babel-bot]

Comment originally made by @prewk

It's not on npm yet, right? https://www.npmjs.com/package/babel Only 6.3.13 here.

edit: Nvm, I know it's babel-traverse, just had to figure out to remove babel-core completely and reinstall it.