cgen: error: ',' expected (got ";")

[koplenov]

V version: V 0.4.9 f9106a8, press to see full `v doctor` output

V full version	V 0.4.9 4fcd94a.f9106a8
OS	windows, Њ ©Єа®б®дв Windows 10 Pro 19045 64-а §ап¤­ п
Processor	28 cpus, 64bit, little endian, Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz
Memory	17.79GB/31.86GB
V executable	C:\Dev\Progs\v\v.exe
V last modified time	2025-01-16 15:42:53
V home dir	OK, value: C:\Dev\Progs\v
VMODULES	OK, value: C:\Users\koplenov.vmodules
VTMP	OK, value: C:\Users\koplenov\AppData\Local\Temp\v_0
Current working dir	OK, value: C:\Dev\Zone\mam_v\treevee\src\ast\repro2
Git version	git version 2.42.0.windows.2
V git status	weekly.2025.1-67-gf9106a86 (2 commit(s) behind V master)
.git/config present	true
cc version	N/A
gcc version	gcc (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders, r4) 13.2.0
clang version	clang version 18.1.2
msvc version	N/A
tcc version	tcc version 0.9.27 (x86_64 Windows)
tcc git status	thirdparty-windows-amd64 b425ac82
emcc version	N/A
glibc version	N/A

What did you do?
./v -g -o vdbg cmd/v && ./vdbg .\main.v && C:\Dev\Zone\mam_v\treevee\src\ast\repro2\main.exe

module main

pub struct Tree {}

pub type TreeBelt = map[string]fn (input &Tree, belt TreeBelt) []&Tree

pub fn (tree &Tree) processed(){
	mut blet := TreeBelt(map[string]fn (&Tree, TreeBelt) []&Tree{})
	blet['pu pu pu'] = fn (input &Tree, belt TreeBelt) []&Tree {
			return []
	}
}

fn main(){
	tree := Tree{}
	tree.processed()
}

What did you see?

================== C compilation error (from tcc): ==============
cc: C:/Users/koplenov/AppData/Local/Temp/v_0/main.01JHRNSK81CK9BS4AHWMB17CZR.tmp.c:3934: warning: implicit declaration of function 'tcc_backtrace'
cc: C:/Users/koplenov/AppData/Local/Temp/v_0/main.01JHRNSK81CK9BS4AHWMB17CZR.tmp.c:6528: error: ',' expected (got ";")
... (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 .

What did you expect to see?

Successful compilation

If you delete this code:

blet['pu pu pu'] = fn (input &Tree, belt TreeBelt) []&Tree {
	return []
}

it compiles

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[huly-for-github]

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