builder error when unwrapping result of enum's from() (to optional value)

[mac-hel]

V doctor:

V full version: V 0.4.4 f603035.c9933da
OS: linux, "EndeavourOS Linux"
Processor: 8 cpus, 64bit, little endian, 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

getwd: /H/_nobackup/Projects/v_t
vexe: /H/daily/mh/.local/share/v/v
vexe mtime: 2024-02-12 15:34:33

vroot: OK, value: /H/daily/mh/.local/share/v
VMODULES: OK, value: /home/mh/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.43.1
Git vroot status: weekly.2024.06-56-gc9933da6
.git/config present: true

CC version: cc (GCC) 13.2.1 20230801
thirdparty/tcc status: thirdparty-linux-amd64 99683af0

What did you do?
v -g -o vdbg cmd/v && vdbg main.v

enum Operation {
	get_area
	get_sector
}

fn main() {
	operation_name := 'get_area'
        // I want 'operation' to have `?Operation' type
	operation := if o := Operation.from(operation_name) { o } else { ?Operation(none) }
}

this works:

	operation := if o := Operation.from(operation_name) { ?Operation(o) } else { ?Operation(none) }

What did you expect to see?

no builder error, probably compiler error instead

What did you see instead?

/tmp/v_1000/main.01HPEZC36RV5VS0GNSTPAJ2C31.tmp.c:12965: error: cannot convert 'struct _option_main__Operation' to 'enum <anonymous>'
...
==================
(Use `v -cg` to print the entire error message)

builder error: 
==================
C error. This should never happen.

This is a compiler bug, please report it using `v bug file.v`.

https://github.com/vlang/v/issues/new/choose

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[felipensp]

I see the branches are emitting different types. So it must be a checker error there.