bail = true should not kill watch mode on ModuleNotFound error

[spion-h4]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

When bail = true, a ModuleNotFound error during a change of the files will cause the entire watch process to either abort or get stuck. Subsequent rebuilds will not happen even if the file changes.

If the current behavior is a bug, please provide the steps to reproduce.

• run webpack in watch mode
• add import './non-existant-module' to any file
• webpack rebuild fails or exits
• remove the import
• rebuild is not triggered either due to webpack exit (3.10 and below) or due to hang (3.11)

node version: 8.9.4

Webpack 3.11 made one step towards fixing this with webpack/webpack#5797

However even though the process does not die, rebuilds stop happening.

[sokra]

Why are you using bail: true with watching? Which advantages are you expecting?

[spion-h4]

@sokra I have a config file that specifies bail true by default. I was not sure what to expect. Maybe that the first typescript compilation error will abort the current bundling if bail: true, whereas with bail: false bundling will continue despite errors. Certainly not that the process will die in watch mode.

Why am I even allowed to use bail true when watching? Why doesn't webpack ignore the option if its not supposed to be used? Perhaps generate an error?

[sokra]

https://webpack.js.org/configuration/other-options/#bail

bail will exit webpack when the first error is found. You can use it in watch mode, but it will still exit webpack when the first error is found.

[spion-h4]

At the very least webpack should generate a warning when you try to set bail and watch to true at the same time.

edit: This can easily happen through config files and forgetting to add --bail=false in watch mode.

[webpack-bot]

This issue had no activity for at least half a year.

It's subject to automatic issue closing if there is no activity in the next 15 days.

[alexander-akait]

/cc @webpack/cli-team should be easy to implement

[snitin315]

Yes, I will do it.