Cargo build fails on Utf8Error

[johnjelinek]

$ RUST_BACKTRACE=1 cargo run --verbose

I tried this code:

pub fn main() {
    println!("Hello world");
}

I expected to see this happen: Hello world

Instead, this happened:

   Compiling my_project v0.1.0 (file:///Users/administrator/Projects/my_project)
     Running `rustc main.rs --crate-name my_project --crate-type bin -g --out-dir /Users/administrator/Projects/my_project/target/debug --emit=dep-info,link -L dependency=/Users/administrator/Projects/my_project/target/debug -L dependency=/Users/administrator/Projects/my_project/target/debug/deps`
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: Utf8Error { valid_up_to: 0 }', ../src/libcore/result.rs:746
stack backtrace:
   1:        0x10f9403a8 - std::sys::backtrace::tracing::imp::write::h4c73fcd3363076f5
   2:        0x10f94c7f5 - std::panicking::default_hook::_$u7b$$u7b$closure$u7d$$u7d$::h0422dbb3077e6747
   3:        0x10f94c32f - std::panicking::default_hook::haac48fa641db8fa2
   4:        0x10f910f86 - std::sys_common::unwind::begin_unwind_inner::h39d40f52add53ef7
   5:        0x10f91308e - std::sys_common::unwind::begin_unwind_fmt::h64c0ff793199cc1b
   6:        0x10f93dba7 - rust_begin_unwind
   7:        0x10f988df0 - core::panicking::panic_fmt::h73bf9d7e8e891a73
   8:        0x10f76459a - core::result::unwrap_failed::h82c81d60621f70bd
   9:        0x10f764500 - rbml::Doc::as_str_slice::hd88d17b04c3f2cca
  10:        0x10ba6bac4 - rustc_metadata::decoder::maybe_get_crate_hash::h1c0939ce4d9ba236
  11:        0x10baa0874 - rustc_metadata::loader::Context::extract_one::h56453781fb65bffa
  12:        0x10ba98953 - rustc_metadata::loader::Context::find_library_crate::h30ea71d32623d713
  13:        0x10ba7da99 - rustc_metadata::loader::Context::load_library_crate::h7787c1fa9559d604
  14:        0x10ba7cae6 - rustc_metadata::creader::CrateReader::resolve_crate::h98decfaedbcfe12a
  15:        0x10ba7e1fb - rustc_metadata::creader::CrateReader::resolve_crate_deps::_$u7b$$u7b$closure$u7d$$u7d$::h4bd0eba4f8aa0bca
  16:        0x10ba7df9b - _<std..collections..HashMap<K, V, S> as std..iter..FromIterator<(K, V)>>::from_iter::h7ccc89cd3e9da036
  17:        0x10ba79e6c - rustc_metadata::creader::CrateReader::register_crate::hdfd966766b932c68
  18:        0x10ba7f028 - rustc_metadata::creader::CrateReader::read_extension_crate::hb0997de4fb0918fb
  19:        0x10ba81315 - rustc_metadata::creader::CrateReader::read_exported_macros::hf3b61431145aafb6
  20:        0x10baa5a7c - _<macro_import..MacroLoader<'a> as syntax..visit..Visitor<'v>>::visit_item::h668e7bfc1acab9b3
  21:        0x10baa488a - rustc_metadata::macro_import::read_macro_defs::h240a20dad60749cc
  22:        0x10b47e8ab - rustc_driver::driver::phase_2_configure_and_expand::h505e157de342d54f
  23:        0x10b464ea6 - rustc_driver::driver::compile_input::h6491aaddd9e61258
  24:        0x10b44dd8f - rustc_driver::run_compiler::h80b2ba5e4d787c5f
  25:        0x10b44b122 - std::sys_common::unwind::try::try_fn::h34e27823ddd1d5e9
  26:        0x10f93db3b - __rust_try
  27:        0x10f93dac3 - std::sys_common::unwind::inner_try::h9eebd8dc83f388a6
  28:        0x10b44b9b9 - _<F as std..boxed..FnBox<A>>::call_box::h3d5d78986dfac5b2
  29:        0x10f94b6c8 - std::sys::thread::Thread::new::thread_start::h471ad90789353b5b
  30:     0x7fff8aeeb059 - _pthread_body
  31:     0x7fff8aeeafd6 - _pthread_start

error: Could not compile `my_project`.

Caused by:
  Process didn't exit successfully: `rustc main.rs --crate-name my_project --crate-type bin -g --out-dir /Users/administrator/Projects/my_project/target/debug --emit=dep-info,link -L dependency=/Users/administrator/Projects/my_project/target/debug -L dependency=/Users/administrator/Projects/my_project/target/debug/deps` (exit code: 101)

Meta

rustc --version --verbose:

rustc 1.9.0 (e4e8b6668 2016-05-18)
binary: rustc
commit-hash: e4e8b666850a763fdf1c3c2c142856ab51e32779
commit-date: 2016-05-18
host: x86_64-apple-darwin
release: 1.9.0

[nagisa]

Duplicate of #33778

[nagisa]

@johnjelinek a question: is this a completely new cargo project? This is a first case I see this reported for something without any dependencies.

[johnjelinek]

it's not a completely new cargo project. I added a dependency for sdl2 and core-native and then removed the dependencies and changed main.rs to what it is in the bug report.