v compiler doesn't recognize interface type when passing to array method

[daansystems]

V doctor:

V full version: V 0.4.7 18eee34.4ee948f
OS: windows, Microsoft Windows 11 Pro v22631 64-bit
Processor: 24 cpus, 64bit, little endian, 

getwd: D:\vbug
vexe: C:\v\v.exe
vexe mtime: 2024-09-24 17:12:18

vroot: OK, value: C:\v
VMODULES: OK, value: C:\Users\info\.vmodules
VTMP: OK, value: C:\Users\info\AppData\Local\Temp\v_0

Git version: git version 2.42.0.windows.2
Git vroot status: weekly.2024.39-5-g4ee948fe-dirty
.git/config present: true

CC version: Error: 'cc' is not recognized as an internal or external command,

operable program or batch file.


thirdparty/tcc status: thirdparty-windows-amd64 b425ac82

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

module main

interface IGameObject {
	mut:
	name string
}

struct GameObject implements IGameObject {
mut:
	name string
}

struct Game {
mut:
	objects        []IGameObject
}

fn (mut game Game) gc() {
	for obj in game.objects {
		game.objects.delete(obj)
	}
	game.objects.clear()
}

fn main() {}

What did you expect to see?

no c compiler error

What did you see instead?

================== C compilation error (from tcc): ==============
cc: C:/Users/info/AppData/Local/Temp/v_0/main.01J8JMB0XJMWQ088W3RH9WNT80.tmp.c:7068: warning: implicit declaration of function 'tcc_backtrace'
cc: C:/Users/info/AppData/Local/Temp/v_0/main.01J8JMB0XJMWQ088W3RH9WNT80.tmp.c:13536: error: cannot convert 'struct main__IGameObject' to 'int'
... (the original output was 3 lines long, and was truncated to 2 lines)
=================================================================
(You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
builder error: 
==================
C error found. It should never happen, when compiling pure V code.
This is a V compiler bug, please report it using `v bug file.v`,
or goto https://github.com/vlang/v/issues/new/choose .
You can also use #help on Discord: https://discord.gg/vlang .

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[yuyi98]

game.objects.delete(obj) ?
The array delete() has no such usage, Of course we should check for errors.

[StunxFS]

@daansystems To delete the elements of the array, you could use the following:

fn (mut game Game) gc() {
	for i, mut obj in game.objects {
		unsafe { obj.free() }
		game.objects.delete(i)
	}
	game.objects.clear()
}

Note that if you want to free the gc Game object, the method must be called free and not gc (gc has no special meaning to the compiler, free does).