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elm-lang / elm-make

A build tool for Elm projects
BSD 3-Clause "New" or "Revised" License
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Elm run-time error: decoder not found #182

Closed keroami closed 7 years ago

keroami commented 7 years ago

When I run the attached elm file, the browser console tells me it cannot find tag in decoder. When I inline lazyRamblingsDecoder Elm works fine (as expected, the JSON cannot be parsed) Then, when I use the oneOf construction (where the comments are, i.e. code becomes

JD.oneOf
    [ boxedDecoder
    , plainDecoder
    ]

), same error When I then inline boxedDecoder, Elm works fine (and the JSON is parsed and rendered)

DecodeRambling.elm.txt

Elm 0.18.0 installed with Npm on Ubuntu.

process-bot commented 7 years ago

Thanks for the issue! Make sure it satisfies this checklist. My human colleagues will appreciate it!

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keroami commented 7 years ago

Couple of things: (1) despite elm-make listing as its first task , to "compile to JS", it is not the compiler, as that is elm-compiler. How am I supposed to know? Naturally there are bug reports over there, e.g. https://github.com/elm-lang/elm-compiler/issues/1560 (2) It's widely known: https://blog.ilias.xyz/help-my-recursive-decoder-caused-a-runtime-exception-453d46a99e1e and according to this same person (on slack) fixed in 0.19. But not released. For a language that prides itself on having no run-time errors, I do not understand that, (3) If you read this issue in the past 19 days, thanks for not responding with at least (1). (4) I'll close this now.