prefer-const produces invalid autofix when using destructuring with multiple declarators

[not-an-aardvark]

Tell us about your environment

• ESLint Version: master
• Node Version: 12.1.0
• npm Version: 6.9.0

What parser (default, Babel-ESLint, etc.) are you using?

default

Please show your full configuration:

Configuration

rules:
  prefer-const: error

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

let {a, b} = c, d;

eslint --fix

What did you expect to happen?

I expected ESLint to not create a syntax error.

What actually happened? Please include the actual, raw output from ESLint.

ESLint produced the following autofixed code, which has a syntax error:

const {a, b} = c, d;

Demo link

This was discovered when running the fuzzer locally.

Are you willing to submit a pull request to fix this bug?

Yes, but I'm not sure when I'll have time.

[g-plane]

Should we disable autofix at this case or split it into two statements?

[mysticatea]

I think that disabling autofix is good enough.

[mdjermanovic]

Similar bugs:

let {a, b, c} = {}, e, f;

let {a, b} = {}, c = 0;
c = 1;