Bug Report

• I would like to work on a fix!

Current behavior

• Execute the code in this Gist, i.e.

git clone https://gist.github.com/mi-ac/84bd2c536fe7f7094a926b2fc3af03db repro
cd repro
npm install
node repro.js

• Hangs.

Expected behavior

• Change package.json and set version of babel-traverse to 7.5.5. Execute:

npm install
node repro.js

• Runs fast.

Additional context

• Guess the change is one of:

• 5fb4d84 2019-08-01 | perf: always return void 0 as undefined node (perf: always return void 0 as undefined node #10243) [Huáng Jùnliàng]
• 3e4a9d5 2019-08-01 | Do expressions transform for switch statements (Do expressions transform for switch statements #10070) [Tan Li Hau]
• be2cbde 2019-08-01 | remove finally from completion record in trystatement (remove finally from completion record in try statement #10277) [Tan Li Hau]
• 4f0840a 2019-07-27 | Update dev dependencies and fix linting errors (Update dev dependencies and fix linting errors #10228) [Daniel Tschinder]
• fced5ce 2019-07-21 | Fix tdz checks in transform-block-scoping plugin (Fix tdz checks in transform-block-scoping plugin #9498) [Nicolò Ribaudo]