C Error while returning struct ref for interface directly from other method call

[akkinenirajesh]

V doctor:

V full version: V 0.4.5 22744ce.1e8d1a4
OS: macos, macOS, 13.6.1, 22G313
Processor: 8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-7920HQ CPU @ 3.10GHz

getwd: /Users/rajesh/dev/buvi
vexe: /Users/rajesh/dev/v/v
vexe mtime: 2024-03-27 13:02:57

vroot: OK, value: /Users/rajesh/dev/v
VMODULES: OK, value: /Users/rajesh/.vmodules
VTMP: OK, value: /tmp/v_502

Git version: git version 2.39.3 (Apple Git-145)
Git vroot status: weekly.2024.13-24-g1e8d1a4d-dirty
.git/config present: true

CC version: Apple clang version 15.0.0 (clang-1500.1.0.2.5)
thirdparty/tcc status: thirdparty-macos-amd64 46662e20

What did you do?
v -g -o vdbg cmd/v && vdbg ./bugs/bugs2.v

struct Node1 {
	data int
}

struct Node2 {
	data int
}

interface INode {
	data int
}

fn make_node(c int) !INode {
	match c {
		1 {
			return make_node1()!
		}
		2 {
			return make_node2()!
		}
		else {
			return error('invalid node type')
		}
	}
}

fn make_node1() !&Node1 {
	return &Node1{
		data: 1
	}
}

fn make_node2() !&Node2 {
	return &Node2{
		data: 2
	}
}

What did you expect to see?

Should compile without C error

What did you see instead?

==================
/tmp/v_502/bugs2.01HT01TZ4ZQR212NCFVRBCMDY3.tmp.c:13076:35: error: indirection requires pointer operand ('main__INode' (aka 'struct main__INode') invalid)
                                _result_ok(&(main__INode[]) { *I_main__Node1_to_Interface_main__INode( (*(main__Node1**)_t2.data)) }, (_result*)(&_t1), sizeof(main__INode));
                                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/v_502/bugs2.01HT01TZ4ZQR212NCFVRBCMDY3.tmp.c:13088:35: error: indirection requires pointer operand ('main__INode' (aka 'struct main__INode') invalid)
                                _result_ok(&(main__INode[]) { *I_main__Node2_to_Interface_main__INode( (*(main__Node2**)_t5.data)) }, (_result*)(&_t4), sizeof(main__INode));
                                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
...
==================
(Use `v -cg` to print the entire error message)

builder error: 
==================
C error. This should never happen.

This is a compiler bug, please report it using `v bug file.v`.

https://github.com/vlang/v/issues/new/choose

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