Broadcasting a constant struct hits an assert in the llvm backend

[leecommamichael]

Context

    Odin:    dev-2025-05:e3fe733a5
    OS:      Windows 11 Home Basic (version: 24H2), build 26100.3775
    CPU:     AMD Ryzen 7 7700 8-Core Processor
    RAM:     15447 MiB
    Backend: LLVM 20.1.0

Failure Information (for bugs)

llvm_backend_const.cpp(918): Assertion Failure: elem_count == type->Array.count 1 != 2

Steps to Reproduce

INT :: struct { i: int }
ONE : Int: {1}
data: [2][2]Int = { ONE, { {4}, {5},} }

or

Int :: struct { i: int }
ONE: Int : {1} 
no_bro( { ONE, { {4}, {5},} } )
no_bro :: proc (#no_broadcast structs: [2][2]Int) {}

Please provide detailed steps for reproducing the issue.

odin run . with either snippet above.

Failure Logs

llvm_backend_const.cpp(918): Assertion Failure: elem_count == type->Array.count 1 != 2

Talked with @Kelimion on Discord here: https://discord.com/channels/568138951836172421/568146055409958913/1370504300953862155
Kelimion supposes the checker really ought to consider it an error to use Array Programming features with non-numerics.

[leecommamichael]

package scratch

import "core:fmt"

String :: distinct string
ONE : String : "1"

main :: proc() {
    data: [2][2]String = { ONE, {"4", "5"}}
    fmt.println(data)
}

Yields
W:\Odin\src\llvm_backend_const.cpp(93): Assertion Failure: lb_sizeof(dst) == lb_sizeof(src) [2 x %..string] vs %..string = type { ptr, i64 }

[leecommamichael]

duplicate of #5141