C error when implementing two interfaces, one of them generic

[ratkingsminion]

Describe the bug

Code: https://play.vlang.io/p/8c844fb35a

interface IA {
	a int
	fa()
}
interface IB[T] {
	a int
	b T
	fa()
}
struct Foo[T] implements IA, IB {
	a int
	b T
}
fn (foo Foo[T]) fa() {
	println(foo.b)
}

foo := Foo[u8]{ b: 16 }
foo.fa()

Reproduction Steps

Run the code above

Expected Behavior

No errors, or at least a V error

Current Behavior

Output:

/tmp/v_60000/code.01J7BQJ4X1E5N9VQANX1JA2JPJ.tmp.c:2174: error: ',' expected (got "*")
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 .
Exited with error status 1

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.7 6528efa

Environment details (OS name and version, etc.)

V full version: V 0.4.7 6528efa
OS: linux, Debian GNU/Linux 11 (bullseye) (VM)
Processor: 1 cpus, 64bit, little endian, Intel(R) Xeon(R) CPU E5-2686 v4 @ 2.30GHz

getwd: /home/admin/playground
vexe: /home/admin/v/v
vexe mtime: 2024-09-09 15:25:27

vroot: OK, value: /home/admin/v
VMODULES: OK, value: .vmodules
VTMP: OK, value: /tmp/v_0

Git version: git version 2.30.2
Git vroot status: Error: fatal: detected dubious ownership in repository at '/home/admin/v'
To add an exception for this directory, call:

	git config --global --add safe.directory /home/admin/v
.git/config present: true

CC version: cc (Debian 10.2.1-6) 10.2.1 20210110
thirdparty/tcc status: Error: fatal: detected dubious ownership in repository at '/home/admin/v/thirdparty/tcc'
To add an exception for this directory, call:

	git config --global --add safe.directory /home/admin/v/thirdparty/tcc
 Error: fatal: detected dubious ownership in repository at '/home/admin/v/thirdparty/tcc'
To add an exception for this directory, call:

	git config --global --add safe.directory /home/admin/v/thirdparty/tcc

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