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Assertion Failure: lb_sizeof(dst) == lb_sizeof(src) [2 x %..string] vs %..string = type { ptr, i64 } in llvm_backend_const.cpp(93) #6036

@greenya

Description

@greenya

Context

    Odin:    dev-2025-12-nightly
    OS:      Ubuntu 25.10, Linux 6.17.0-8-generic
    CPU:     Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
    RAM:     31953 MiB
    Backend: LLVM 20.1.8

Expected Behavior

Compiler should not crash and print error. These are two different types: [2] string and [] [2] string.

Current Behavior

Compiler crashes.

Failure Information (for bugs)

Running program with odin run . gives

    src/llvm_backend_const.cpp(93): Assertion Failure: `lb_sizeof(dst) == lb_sizeof(src)` [2 x %..string] vs %..string = type { ptr, i64 }
    Illegal instruction (core dumped)

Steps to Reproduce

package main

main :: proc () {
    foo({ "1", "2" })
}

foo :: proc (pairs: [] [2] string) {
}

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