builder error: Incorrect type inference and pattern matching for pointers to sum type elements

[russo-2025]

Describe the bug

v -g run file.v

Reproduction Steps

pub type Command = Assign | Call

pub struct Assign {}

pub struct Call {
mut:
	text string
}

fn main() {
	mut command_arr_ptr := [ &Command(Call{}) ]
	mut command_arr_el_ptr := &command_arr_ptr[0] // type is && ?
	
	match mut command_arr_el_ptr {
		Call { //builder error: expected struct or union but not 'struct main__Command *'
			command_arr_el_ptr.text = "foo"
		}
		Assign {

		}
	}
}

pub type Command = Assign | Call

pub struct Assign {}

pub struct Call {
mut:
	text string
}

fn main() {
	mut command_arr_ptr := [ &Command(Call{}) ]
	mut command_arr_el_ptr := command_arr_ptr[0]
	println(typeof(command_arr_el_ptr)) // builder error: expected struct or union but not 'struct main__Command *'
}

Expected Behavior

readable error or ok

Current Behavior

builder error

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.9 6d017f3

Environment details (OS name and version, etc.)

V full version	V 0.4.9 a132d97.6d017f3
OS	windows,
Processor	16 cpus, 64bit, little endian, Error: cpu - Alias not found.
Memory	45.24GB/63.92GB
V executable	M:_dev\vlang\v.exe
V last modified time	2025-02-20 19:25:24
V home dir	OK, value: M:_dev\vlang
VMODULES	OK, value: C:\Users\russo.vmodules
VTMP	OK, value: C:\Users\russo\AppData\Local\Temp\v_0
Current working dir	OK, value: C:\Users\russo\Desktop\vbugs
Git version	git version 2.47.1.windows.1
V git status	weekly.2025.07-69-g6d017f3a
.git/config present	true
cc version	N/A
gcc version	gcc (x86_64-posix-seh, Built by strawberryperl.com project) 8.3.0
clang version	N/A
msvc version	N/A
tcc version	tcc version 0.9.27 (x86_64 Windows)
tcc git status	N/A
emcc version	N/A
glibc version	N/A

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[huly-for-github]

Connected to Huly®: V_0.6-22187