purescript / purescript/trypurescript

Compilation stuck/errors on occurence of binding guards

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Dominant language
PureScript
Stars
121
Forks
51
PR merge metrics
No merged PRs in 30d

Description

Trying to compile this minimal example:

module Main where
x | _ <- 1 = 1

page either gets stuck on loading logo (https://try.purescript.org) or returns this error (https://try.ps.ai):

bad result. Likely communication issue with compiler: POST compile response failed to decode: There was a problem making the request: AJAX request failed: POST https://compile.purescript.org/compile

where response to request is 500 Internal Server Error.

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the minimal PureScript example in try.purescript.org and try.ps.ai, then inspect the compile request path and the POST /compile response handling. Trace whether the binding guard reaches the compiler or causes the 500 and decode failure. Done means the example no longer hangs or returns a 500, with regression coverage where the relevant path is found.

Written by the indexing model from the issue text.

Assessment

Domain
compilers, web-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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