C error - multiple returns values and fixed arrays

[Eliyaan]

Describe the bug

When returning multiple values, if one of those is a fixed size array, it seems to be the cause of a C error.

Reproduction Steps

fn double() (bool, [4]i16) {
        return true, [4]i16{}
}

fn foo() {
        _, b := double()
        for i in b {
        }
}

with v bug.v

Expected Behavior

No C error.

Current Behavior

❯ v bug.v
bug.v:7:6: warning: unused variable: `i`
    5 | fn foo() {
    6 |     _, b := double()
    7 |     for i in b {
      |         ^
    8 |     }
    9 | }
================== C compilation error (from tcc): ==============
cc: /tmp/v_1000/bug.01J5EG61QWPZ7RVQCYVP6FH9BK.tmp.c:13289: error: invalid operand types for binary operation
=================================================================
(You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
builder error:
==================
C error found. It should never happen, when compiling pure V code.

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.7 294f7e4.8210593

Environment details (OS name and version, etc.)

OS: linux, Linux version 6.7.11-200.fc39.x86_64 (mockbuild@bdb8d24f206645e2bda44c1cf867612d) (gcc (GCC) 13.2.1 20240316 (Red Hat 13.2.1-7), GNU ld version 2.40-14.fc39) #1 SMP PREEMPT_DYNAMIC Wed Mar 27 16:50:39 UTC 2024

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