Panic in alias analysis

I have come across more code that makes the alias analysis panic that is related to nested oneOfs from the roc-parser package and expects. When I run the code below, I get this compiler error:

jojo@Windows-PC:~/code/feed-reader$ roc test backend/test.roc
[... some warnings about unnecessary definitions ...]
thread 'main' panicked at 'Error in alias analysis: duplicate function name FuncName("\x14\x00\x00\x00\x0b\x00\x00\x00\x02hE\x88u\xeaN\x8f") in module', crates/compiler/gen_llvm/src/llvm/build.rs:5761:19
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

This is minimal reproduction code. If you put this in a file at the root of the roc-parser repo and run it with roc test, you should see the above error.

app "hello-world"
    packages {
        pf: "https://github.com/roc-lang/basic-cli/releases/download/0.8.1/x8URkvfyi9I0QhmVG98roKBUs_AZRkLFwFJVJ3942YA.tar.br",
        parser: "./package/main.roc",
    }
    imports [
        pf.Stdout,
        pf.Task.{ Task },
        parser.Core.{ Parser, oneOf },
        parser.String.{ Utf8 },
    ]
    provides [main] to pf

Node : [
    Element (List Node),
]

pElement : Parser Utf8 _
pElement =
    # Removing one of the `oneOf`s solves the panic
    oneOf [
        oneOf [
            pElement,
        ],
    ]

expect
    # Removing this access solves the panic
    _temp = pElement
    Bool.true

main : Task {} I32
main =
    _temp =
        # This access does not cause the panic
        pElement
    Stdout.line "Testing"

I'm running the current nightly of Roc:

jojo@Windows-PC:~/code/roc-xml-parser/dependencies/roc-parser$ roc --version
roc nightly pre-release, built from commit 3ea9739 on Di 27 Feb 2024 09:01:38 UTC

Similar issues

I reported this issue on the roc-parser repo first, but we suspect that we should report it here too.

I've searched the issues here for the error message (Error in alias analysis: duplicate function name) and these are currently open:

Using expect in the code
- https://github.com/roc-lang/roc/issues/6496
- https://github.com/roc-lang/roc/issues/6290
Not using expect in the code

roc-lang / roc

Panic in alias analysis #6544

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