Undefined reference to rust_begin_unwind

[phil-opp]

When using this crate together with the allocator example of cortex_m_quickstart I get the following linker error:

note: /home/philipp/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/thumbv7em-none-eabihf/lib/libcore-ff2a90084abf53b1.rlib(core-ff2a90084abf53b1.core10-b3f31ca470b010e69733139f71d95864.rs.rcgu.o): In function `core::panicking::panic_fmt::hed27deb097b8209d':
          /checkout/src/libcore/panicking.rs:71: undefined reference to `rust_begin_unwind'

I tried to make the panic_fmt function in this crate public and no_mangle as suggested by rust-lang/rust#38281 (comment), but it didn't help.

It works if I copy the panic implementation with pub and no_mangle to my main.rs.

Rust version: rustc 1.28.0-nightly (5d0631a64 2018-05-30)

[japaric]

This is bug rust-lang/rust#51647 caused, I think, by the new oom lang item.

[japaric]

I believe this has been fixed upstream.