Luke Boswell (Dec 29 2024 at 01:23): Luke Boswell (Dec 29 2024 at 01:23):Does this look like something easy to fix? https://github.com/roc-lang/roc/issues/7429
It's giving me grief upgrading the webserver demo's and using Isaac's RTL templating engine
Sam Mohr (Dec 29 2024 at 01:26):I didn't repro with latest nightly
Sam Mohr (Dec 29 2024 at 01:26):What version of Roc are you using?
Luke Boswell (Dec 29 2024 at 01:28):Built from source
$ roc version
roc built from commit 06e78daa91, committed at 2024-12-28 22:05:45 UTC
oh wait, let me update the Issue, it needs to be in a sub-folder
Luke Boswell (Dec 29 2024 at 01:30):Like
$ roc check src/Views/broken.roc
An internal compiler expectation was broken.
This is definitely a compiler bug.
Please file an issue here: <https://github.com/roc-lang/roc/issues/new/choose>
Outstanding references to the derived module
Location: crates/compiler/load_internal/src/file.rs:3358:29
Sorry, I hadn't realised the folder thing was relevant here
Luke Boswell (Dec 29 2024 at 01:38):The whole derived_module thing looks a bit confusing.
Sam Mohr (Dec 29 2024 at 01:45):I'm unable to replicate
Sam Mohr (Dec 29 2024 at 01:46):I checked out the commit, created a --release build, and ran roc/target/release/roc check src/Views/broken.roc
Sam Mohr (Dec 29 2024 at 01:46):~/dev
❯ roc/target/release/roc check src/Views/broken.roc
0 errors and 0 warnings found in 29 ms.
Is this in the roc-htmx-tailwind repo?
Sam Mohr (Dec 29 2024 at 01:47):Oh, that repo
Luke Boswell (Dec 29 2024 at 01:48):https://github.com/lukewilliamboswell/roc-htmx-tailwindcss-demo/tree/upgrade-0.11.0
Luke Boswell (Dec 29 2024 at 01:49):Yeah, if you checkout that branch and add the file src/Views/broken.roc you should get;
$ roc check src/Views/broken.roc
An internal compiler expectation was broken.
This is definitely a compiler bug.
Please file an issue here: <https://github.com/roc-lang/roc/issues/new/choose>
Outstanding references to the derived module
Location: crates/compiler/load_internal/src/file.rs:3358:29
It also happens with $ roc check src/Views/Pages.roc but the broken.roc is a super small repro
Sam Mohr (Dec 29 2024 at 01:49):Okay, got it with Layout.roc
Sam Mohr (Dec 29 2024 at 01:51):Well, it also works with just module [] in broken.roc
Luke Boswell (Dec 29 2024 at 01:52):ohk, interesting
Sam Mohr (Dec 29 2024 at 01:52):So this isn't a "minimal" repro IMO since I think the problem is elsewhere
Luke Boswell (Dec 29 2024 at 01:56):Ok heres a minimal repro https://github.com/lukewilliamboswell/roc-htmx-tailwindcss-demo/tree/broken
Luke Boswell (Dec 29 2024 at 01:56):There's only two files in there, the broken.roc and a minimal main.roc referencing the new webserver
Sam Mohr (Dec 29 2024 at 01:57):Okay, that's minimal
Sam Mohr (Dec 29 2024 at 01:57):I wonder if it happens with basic-cli
Luke Boswell (Dec 29 2024 at 01:57):1 sec
Luke Boswell (Dec 29 2024 at 01:59):Yeah it does. Just pushed a commit changing the main.roc to
app [main!] { pf: platform "https://github.com/roc-lang/basic-cli/releases/download/0.17.0/lZFLstMUCUvd5bjnnpYromZJXkQUrdhbva4xdBInicE.tar.br" }
main! = \_ -> Err TODO
Okay, then it's maybe not a platform problem?
Luke Boswell (Dec 29 2024 at 01:59):No it's definitely the compiler
Sam Mohr (Dec 29 2024 at 02:00):Oh, it's definitely the compiler
Sam Mohr (Dec 29 2024 at 02:00):I mean whether this happens in just a Roc package vs. a platform
Luke Boswell (Dec 29 2024 at 02:02):In this case it's neither of those... this has an app module at the root, the parent folder from the module we are checking
Sam Mohr (Dec 29 2024 at 02:24):Can you update the GH issue?
Luke Boswell (Dec 29 2024 at 02:37):done
Anthony Bullard (Dec 29 2024 at 03:04):That’s weird. Can you check the compiler commit right before my change to package headers?
Anthony Bullard (Dec 29 2024 at 03:04):If that works it’s an easy bisect :blush:
Anthony Bullard (Dec 29 2024 at 03:05):And you get the added pleasure of shaming me
Ayaz Hafiz (Dec 29 2024 at 03:30):the bug is present before that
Notification Bot (Dec 29 2024 at 03:33):37 messages were moved here from #compiler development > casual conversation by Luke Boswell.
Ayaz Hafiz (Dec 29 2024 at 03:55):is this a valid way to use a value from a platform?
module []
import pf.Stderr
foo = Stderr.line
i understand the problem well I think. The issue is that when a module is checked, if there is a transitive platform found, that platform is also placed into the queue of modules to resolve (https://github.com/roc-lang/roc/blob/723e35f11e1b1744c77cde77e42ed2b48fff12a6/crates/compiler/load_internal/src/file.rs#L1300-L1361). However if the module doesn't use the platform, it will finish all its computation before the platform has had a chance to, hence the panic. I think probably (?) the right way to do this is to only traverse to find the package if it doesn't exist in the package shorthand list, and then add it as a dependency of the module, but I don't totally understand all the flow here and Ive run out of tie
Last updated: Jul 26 2025 at 12:14 UTC