Can records that use &
be multiline? I have a record with lots of fields (and a lot of reused defaults), but I can't seem to multiline it without crashing the compiler.
Example from the tutorial: fromOriginal = { original & birds: 4, iguanas: 3 }
Style 1:
fromOriginal =
{
original &
birds: 4,
iguanas: 3,
}
Style 2:
fromOriginal =
{
original
&
birds: 4,
iguanas: 3,
}
Crash:
» x = { a: 1 }
… {
… x &
… a: 2
… }
thread '<unnamed>' panicked at 'A SpaceBefore did not get removed during operator desugaring somehow: SpaceBefore(
Var {
module_name: "",
ident: "x",
},
[
Newline,
],
)', compiler/can/src/expr.rs:836:13
stack backtrace:
0: 0x10c83e08f - <unknown>
1: 0x10be3f73b - <unknown>
2: 0x10c8310ca - <unknown>
3: 0x10c834925 - <unknown>
4: 0x10c8350e8 - <unknown>
5: 0x10c83e91a - <unknown>
6: 0x10c83e1b7 - <unknown>
7: 0x10c8349f0 - <unknown>
8: 0x10e1e8b4f - <unknown>
9: 0x10c1c16df - <unknown>
10: 0x10c1b119f - <unknown>
11: 0x10c1b835f - <unknown>
12: 0x10c19e494 - <unknown>
13: 0x10c6445dd - <unknown>
14: 0x10c664d82 - <unknown>
15: 0x10c6249cb - <unknown>
16: 0x10c623913 - <unknown>
17: 0x10c624871 - <unknown>
18: 0x10c83efa9 - <unknown>
19: 0x7ff81cc774f4 - __pthread_start
The same crash happens for
{
x & a: 2
}
This seems like a bug - I'll just report an issue :)
https://github.com/rtfeldman/roc/issues/2534
Last updated: Jul 06 2025 at 12:14 UTC