Strange error message with @[flag] enum

[JalonSolov]

Describe the bug

Tried to implement a has method on an enum, but ran into a message that it's a duplicate message.

Reproduction Steps

@[flag]
enum Flags {
	bit0
	bit1
	bit2
	bit3
	bit4
	bit5
	bit6
	bit7
}

fn (f Flags) has(f2 Flags) bool {
	return f & f2 > 0
}

Expected Behavior

Clean compile, or details of the actual problem.

Current Behavior

flag_enum.v:5:29: error: duplicate method `has`
    3 |     bit0
    4 |     bit1
    5 |     bit2
      |         ^
    6 |     bit3
    7 |     bit4

Possible Solution

Turns out, this is because flag enum are currently implemented as bitfields, so the duplication is because of bitfield.has(). However, that is not in any way obvious from the error message, regardless of the message showing the wrong section of code.

Additional Information/Context

If V is going to complain about this, then

1. It should show the correct location in the code.
2. It should tell what is being duplicated with more detail, instead of expecting a "treasure hunt" to figure it out.

V version

V 0.4.4 d5370bd

Environment details (OS name and version, etc.)

V full version: V 0.4.4 efa98d9.d5370bd
OS: linux, "Manjaro Linux"
Processor: 32 cpus, 64bit, little endian, AMD Ryzen 9 7950X 16-Core Processor

getwd: /home/jalon/git/vtar
vexe: /home/jalon/git/v/v
vexe mtime: 2024-02-28 13:11:32

vroot: OK, value: /home/jalon/git/v
VMODULES: OK, value: /home/jalon/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.43.2
Git vroot status: weekly.2024.09-3-gd5370bd2
.git/config present: true

CC version: cc (GCC) 13.2.1 20230801
thirdparty/tcc status: thirdparty-linux-amd64 40e5cbb5

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