Issue originally made by Francisco (tolmasky)

Bug information

• Babel version: 6.4.5
• Node version: 0.12.9
• npm version: 2

Input code

https://runkit.com/tolmasky/babel-function-declaration-params-issue/1.0.0

Description

require("babel-types").NODE_FIELDS.FunctionDeclaration.params.validate.chainOf[1].each lists “LVal”, which contains “MemberExpression"

This means that function parameters can be Member Expressions. This may totally be correct, but I am not familiar with this and certainly when you try to parse:

function a(a.b) { } it fails.

However, constructing that does not break validation, and get code generated (see reduction above in input code).