Building a project using --release results in "LLVM Error: Broken function found"

[yorickpeterse]

To reproduce:

1. git clone git@github.com:YorickPeterse/aeon.git
2. cd aeon
3. cargo build --release --verbose

This will result in the following output:

$ cargo build --release --verbose
   Compiling aeon v0.0.1 (file:///home/yorickpeterse/Private/Projects/rust/aeon)
     Running `rustc src/lib.rs --crate-name libaeon --crate-type lib -C opt-level=3 --out-dir /home/yorickpeterse/Private/Projects/rust/aeon/target/release --emit=dep-info,link -L dependency=/home/yorickpeterse/Private/Projects/rust/aeon/target/release -L dependency=/home/yorickpeterse/Private/Projects/rust/aeon/target/release/deps`
Attributes 'readnone and readonly' are incompatible!
void (%"2.core::result::Result<core::option::Option<alloc::rc::Rc<core::cell::RefCell<object::Object>>>, collections::string::String>"*, %"virtual_machine::VirtualMachine"*, i64, %"compiled_code::CompiledCode"*)* @"_ZN15virtual_machine28VirtualMachine$LT$$u27$l$GT$3run20hd9ac846594b29f06JraE"
LLVM ERROR: Broken function found, compilation aborted!
Could not compile `aeon`.

Caused by:
  Process didn't exit successfully: `rustc src/lib.rs --crate-name libaeon --crate-type lib -C opt-level=3 --out-dir /home/yorickpeterse/Private/Projects/rust/aeon/target/release --emit=dep-info,link -L dependency=/home/yorickpeterse/Private/Projects/rust/aeon/target/release -L dependency=/home/yorickpeterse/Private/Projects/rust/aeon/target/release/deps` (exit code: 1)

Rust version: rustc 1.0.0-dev (built 2015-05-17)
Cargo version: cargo 0.3.0-nightly (06dbe65 2015-05-29) (built 2015-05-29)
LLVM version: 3.5.2
Platform: Linux tuxbook 4.0.4-1-ARCH #1 SMP PREEMPT Mon May 18 06:43:19 CEST 2015 x86_64 GNU/Linux (Arch Linux)

[alexcrichton]

Thanks for the report! This bug belongs on the rust-lang/rust repo, however, as this repo is just for Cargo itself (and this is perhaps a bug in the compiler). Also, could you try reducing the test case down to something smaller? It'll make it easier to fix!