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FunctionDeclaration shouldn't be BlockScoped #10050

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commented May 31, 2019

Q                       A
Fixed Issues? Fixes #10046
Patch: Bug Fix? Yes
Major: Breaking Change? Unclear
Minor: New Feature? No
Tests Added + Pass? Yes
Documentation PR Link
Any Dependency Changes? No
License MIT

WIP, this breaks some tests, but fixes the problems described below

Code sample:

if(true) {
  function run() {
    return true;

function test() {
  return run();

This should fix:

  • @babel/plugin-transform-block-scoping renames run to a new unique name
  • run isn't a binding in the babel-traverse's program.scope

mischnic added some commits May 31, 2019

Fix a scope test
old: `const foo;{function foo() {}}`
new: `const foo = 2;{function foo() {}}`
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