Constant that is an alias of another constant that is an alias of an imported symbol causes race condition

[karl-zylinski]

Context

    Odin:    dev-2025-01:71b0f7e69
    OS:      Windows 10 Professional (version: 22H2), build 19045.5247
    CPU:     Intel(R) Core(TM) i7-6950X CPU @ 3.00GHz
    RAM:     32674 MiB
    Backend: LLVM 18.1.8

Expected Behavior

read_entire_file :: _read_entire_file in one file

and

_read_entire_file :: os.read_entire_file in another file should work.

Current Behavior

Sometimes (race condition) you get:

C:/code/order_bug/a.odin(5:21) Error: Invalid declaration value '_read_entire_file' 
	read_entire_file :: _read_entire_file 
	                    ^~~~~~~~~~~~~~~~^ 

Failure Information (for bugs)

Steps to Reproduce

a.odin

package order_bug

import "core:fmt"

read_entire_file :: _read_entire_file

main :: proc() {
	if data, ok := read_entire_file("file.txt"); ok {
		fmt.println(string(data))
	}
}

b.odin

package order_bug

import "core:os"

_read_entire_file :: os.read_entire_file

Save both into a folder and run:
odin run .

Sometimes you'll get:

C:/code/order_bug/a.odin(5:21) Error: Invalid declaration value '_read_entire_file' 
	read_entire_file :: _read_entire_file 
	                    ^~~~~~~~~~~~~~~~^ 

It's a race condition so you only get it sometimes.

Doing read_entire_file :: os.read_entire_file without the in-between _ version makes it work.

It only happens when I use an imported symbol in _read_entire_file :: os.read_entire_file... If I do read_entire_file :: 5 then it works OK (given that I also change the code in main).

[karl-zylinski]

Might be related to #4239