Double free on calling __$startup_runtime

Context

The internal function __$startup_runtime appears to be the function that is called to initialize the global structs and arrays that are being put into bss section on startup. Since odin doesn't have freestanding target, in certain places the compiler assumes that there is a small portion of Odin runtime that is ran before the main code is ran. When Odin adds a freestanding target the problem of initializing the runtime and global variables will remain in some form, so this bug would have become relevant by then any way.

• Operating System & Odin Version: xubuntu
• Please paste odin report output: dev-2022-02:546faab0

Expected Behavior

We'll create a program that calls __$startup_runtime directly.

foreign _ {
    @(link_name="__$startup_runtime")
    startup_runtime :: proc "c" () ---;
}

@(export)
my_startup :: proc "c" () {
  startup_runtime();
}

And compile with the following flags:

odin build kernel -build-mode:obj \
    -disable-assert \
    -no-crt \
    -no-bounds-check \
    -default-to-nil-allocator \
    -out:something.o

Current Behavior

The compiler crashes with the following error message:

free(): double free detected in tcache 2
Aborted (core dumped)

Expected behaviour

The compiler successfully compiles the code, and in the compiled binary the address of the relocation for startup_runtime call is __$startup_runtime.

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