Raise and reraise exceptions with Stdlib rather than Lwt #188
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Lwt's documentation reads: > In most cases, it is better to use `failwith s` from the standard > library. and > Whenever possible, it is recommended to use `raise exn` instead, as > raise captures a backtrace, while `Lwt.fail` does not. If you call > `raise exn` in a callback that is expected by Lwt to return a > promise, Lwt will automatically wrap `exn` in a rejected promise, > but the backtrace will have been recorded by the OCaml runtime. > > For example, `bind`'s second argument is a callback which returns a > promise. And so it is recommended to use `raise` in the body of that > callback. > > Use `Lwt.fail` only when you specifically want to create a rejected > promise, to pass to another function, or store in a data structure. Prefer to capture backtraces to improve debugability.
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MisterDA
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Sep 10, 2024
talex5
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Sep 10, 2024
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@shonfeder I can't merge this because of the new rules preventing merges if the CI doesn't pass. |
The system works! :D Tho unfortunately the CI failures here are just #186. |
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Thanks again for this fix :D |
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Lwt's documentation reads:
and
Prefer to capture backtraces to improve debugability.
See also ocsigen/lwt#1008.