`wrangler dev` inspector fails to reload sometimes

[jyn514]

Which Cloudflare product(s) does this pertain to?

Wrangler

What versions & operating system are you using?

wrangler 4.10.0

Please provide a link to a minimal reproduction

https://github.com/jyn514/redirect-worker

Describe the Bug

sometimes, not always, i see an error that looks like this:

⎔ Reloading local server...
✘ [ERROR] Build failed with 1 error:

  ✘ [ERROR] Could not resolve
  "/home/jyn/src/redirect-worker/src/worker.js"

      .wrangler/tmp/bundle-kS70zy/middleware-insertion-facade.js:1:43:
        1 │ ...s OTHER_EXPORTS from "/home/jyn/src/redirect-worker/src/worker.js";
          ╵                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

maybe a timing bug?

it happened exactly once when i went from the first commit on https://github.com/jyn514/redirect-worker to the second.

Please provide any relevant error logs

n/a

[jyn514]

oh: i am using nvim 0.12 and nvim does strange things on file save, which may be relevant. here is a trace:

; watchexec --no-vcs-ignore -f src/worker.js --print-events true
[EVENT 0] Event source=Filesystem kind=Modify(Name(Both)) path=/home/jyn/src/redirect-worker/src/worker.js path=/home/jyn/src/redirect-worker/src/worker.js~ filetype=file
[EVENT 1] Event source=Filesystem kind=Modify(Name(From)) path=/home/jyn/src/redirect-worker/src/worker.js
[EVENT 2] Event source=Filesystem kind=Create(File) path=/home/jyn/src/redirect-worker/src/worker.js filetype=file
[EVENT 3] Event source=Filesystem kind=Modify(Data(Any)) path=/home/jyn/src/redirect-worker/src/worker.js filetype=file
[EVENT 4] Event source=Filesystem kind=Access(Close(Write)) path=/home/jyn/src/redirect-worker/src/worker.js filetype=file
[EVENT 5] Event source=Filesystem kind=Modify(Metadata(Any)) path=/home/jyn/src/redirect-worker/src/worker.js filetype=file

[vicb]

Is wrangler crashed after the error or would it pick up the changes on next save?

[jyn514]

it has not crashed, it picks up the changes on the next save.

[dario-piotrowicz]

Hi @jyn514 thanks for the issue and the minimal reproduction (those are always very much appreciated 🫶)

I did check out your minimal reproduction but I couldn't really see the above error, could you please clarify when (and how often) you get this error? do you know if there are any reproduction steps (besides, I assume, running wrangler dev and making changes to your worker.js file) that trigger it? do you access your worker via the browser? or with something like curl?

[jyn514]

i don't think i did anything to access the site, this was definitely in response to a save.

did you test using neovim as the editor? see my first comment at the top.

[dario-piotrowicz]

No sorry I didn't try neovim (sorry I quickly skimmed thought the comments but didn't read it carefully 😅), I'll try that 👍

Specifically I was also wondering what you meant with "inspector" in the issue's title since generally on the team we interpret such word as devtool inspector (the one you get when debugging your worker's code), so I wanted to make sure we're all on the same page, is this issue related to/caused by the devtools inspector in any way? (did you press the d key in your terminal, attach a debugger, used the chrome devtools, etc...?)