typelevel / typelevel/cats

Later should be computed in tailrecs

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Dominant language
Scala
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Description

The current implementation will cause stack overflow when computing a Eval that contains many Later.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  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

Start by locating the Eval and Later implementation and the tailrec handling referenced in the issue. Reproduce an Eval containing many Later values and trace where evaluation recurses; done means the same computation completes without a stack overflow.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
tooling
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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