The return stack pointer does not report an error

[get200]

Describe the bug

The return stack pointer does not report an error.

Reproduction Steps

module main

@[heap]
struct Student {
	name string
	age  int
}

fn main() {
	mut students := []Student{}
	students << Student{
		name: 'Mike'
		age:  16
	}
	students << Student{
		name: 'Amy'
		age:  15
	}

	amy := get_amy(students) or { unsafe { nil } }

	println('push and pop stack') // <-- just do some stack operations

	println(amy) // <-- wrong data
}

fn get_amy(students []Student) ?&Student {
	for s in students {
		if s.name == 'Amy' {
			return &s // <-- pointer to stack
		}
	}
	return none
}

output

PS E:\2024\v\demo> v run .
push and pop stack
&Student{
    name: 'push and pop stack'
    age: 15
}

Expected Behavior

An error should be reported when compiling.

Current Behavior

It compiles normally, but the running results are unpredictable.

Possible Solution

No response

Additional Information/Context

No response

V version

Current V version: V 0.4.8 fc6e481, timestamp: 2024-11-01 13:44:04 +0200

Environment details (OS name and version, etc.)

V full version: V 0.4.8 fc6e481
OS: windows, Microsoft Windows 11 v26120 64-bit
Processor: 24 cpus, 64bit, little endian,

getwd: D:\v\v
vexe: D:\v\v\v.exe
vexe mtime: 2024-11-01 13:27:00

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

Git version: git version 2.46.0.windows.1
Git vroot status: weekly.2024.41-183-gfc6e481b-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

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_{Huly®: V_0.6-21173}