Block scope transform not included when targeting Safari 10

[Steve]

Specifying a target of "safari >= 10" doesn't use the transform-es2015-block-scoping plugin. Yet Safari 10 does need this because of this bug.

Ex:

{
  let a = 3
}

let a = 3

is an error in Safari 10.1.2 resulting in SyntaxError: Can't create duplicate variable that shadows a global property: 'a'.

I've had to manually include this plugin in the include option to get Safari working.

[Brian Ng]

@ssilve1989 thanks for the report! since we source our mappings via compat-table, mind reporting this over there?

[Steve]

@existentialism done

[Babel Bot]

This issue has been moved to babel/babel#6605.