Code model other than medium does not work with lto on riscv64

I tried this code:

// hello.rs
fn main() {
    println!("Hello, world!");
}

// command on riscv64
rustc -C code-model=large -C lto hello.rs
// command on x86_64
rustc --target riscv64gc-unknown-linux-gnu -C code-model=large -C lto hello.rs

I expected to see this happen: code compiles without error

Instead, this happened: failed to load bitcode of module "addr2line-*"

on riscv64, archrv rust:

$ rustc -C code-model=large -C lto hello.rs
warning: linking module flags 'Code Model': IDs have conflicting values in '' and 'hello.8b1675587fc60370-cgu.0'

error: failed to load bitcode of module "addr2line-4a5a0cf02a84c587.addr2line.d0fbcb35ed0a8d23-cgu.0.rcgu.o": 

error: aborting due to 1 previous error; 1 warning emitted

On x86_64, latest stable from rustup:

rustc --target riscv64gc-unknown-linux-gnu -C code-model=large -C lto hello.rs
warning: linking module flags 'Code Model': IDs have conflicting values in '' and 'hello.eea8546ba018bd24-cgu.0'

error: failed to load bitcode of module "addr2line-28336428312034c6.addr2line.134ee917f0cf37e1-cgu.0.rcgu.o": 

error: aborting due to 1 previous error; 1 warning emitted

On x86_64, Nightly:

rustc +nightly --target riscv64gc-unknown-linux-gnu -C code-model=large -C lto hello.rs
warning: linking module flags 'Code Model': IDs have conflicting values: 'i32 3' from , and 'i32 4' from hello.4a3c48060548947b-cgu.0

error: failed to load bitcode of module "addr2line-62ef9fdb0627a182.addr2line.746071221f6a6099-cgu.0.rcgu.o": 

error: aborting due to 1 previous error; 1 warning emitted

Meta

rustc --version --verbose:

rustc 1.85.1 (4eb161250 2025-03-15) (Arch Linux rust 1:1.85.1-1)
binary: rustc
commit-hash: 4eb161250e340c8f48f66e2b929ef4a5bed7c181
commit-date: 2025-03-15
host: riscv64gc-unknown-linux-gnu
release: 1.85.1
LLVM version: 19.1.7

rustc 1.86.0 (05f9846f8 2025-03-31)
binary: rustc
commit-hash: 05f9846f893b09a1be1fc8560e33fc3c815cfecb
commit-date: 2025-03-31
host: x86_64-unknown-linux-gnu
release: 1.86.0
LLVM version: 19.1.7

rustc 1.88.0-nightly (5e17a2a91 2025-04-05)
binary: rustc
commit-hash: 5e17a2a91dd7dbefd8b4a1087c2e42257457deeb
commit-date: 2025-04-05
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.2

This is specific to RISC-V. The same code works fine for x86_64 and aarch64 target. e.g.

rustc +nightly --target aarch64-unknown-linux-gnu -C code-model=large -C lto hello.rs -C linker=/bin/aarch64-linux-gnu-gcc 

Reproduce the issue with rustc using -C code-model=large and -C lto on the riscv64gc-unknown-linux-gnu target, then compare the conflicting Code Model warnings and failed addr2line bitcode loading across stable and nightly. Investigate the compiler and LLVM interaction described in the report. Done means the hello.rs example compiles without the bitcode-loading error.