Closed
Description
I tried this code:
fn main () {
let mut x = ();
unsafe {
std::ptr::write_volatile(&mut x, ());
}
}I expected to see this happen:
Nothing
Instead, this happened:
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 'index out of bounds: the len is 1 but the index is 1', /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/librustc_trans/intrinsic.rs:326
Meta
rustc --version --verbose:
rustc 1.17.0-nightly (956e2bcba 2017-02-12)
binary: rustc
commit-hash: 956e2bcbaa00c05e051718b1375375915064f1c3
commit-date: 2017-02-12
host: x86_64-unknown-linux-gnu
release: 1.17.0-nightly
LLVM version: 3.9
Backtrace:
1: 0x7fdf6f9393fa - std::sys::imp::backtrace::tracing::imp::write::h3188f035833a2635
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:42
2: 0x7fdf6f94775f - std::panicking::default_hook::{{closure}}::h6385b6959a2dd25b
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:349
3: 0x7fdf6f9472fd - std::panicking::default_hook::he4f3b61755d7fa95
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:359
4: 0x7fdf6f947c07 - std::panicking::rust_panic_with_hook::hf00b8130f73095ec
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:553
5: 0x7fdf6f947a44 - std::panicking::begin_panic::h6227f62cb2cdaeb4
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:515
6: 0x7fdf6f9479b9 - std::panicking::begin_panic_fmt::h173eadd80ae64bec
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:499
7: 0x7fdf6f947947 - rust_begin_unwind
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/panicking.rs:475
8: 0x7fdf6f98323d - core::panicking::panic_fmt::h3b2d1e30090844ff
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libcore/panicking.rs:69
9: 0x7fdf6f9831e8 - core::panicking::panic_bounds_check::hecd7d6e6ce8d6275
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libcore/panicking.rs:56
10: 0x7fdf6eb9d8db - rustc_trans::intrinsic::trans_intrinsic_call::h71c3926493851d2f
11: 0x7fdf6ebaf26a - rustc_trans::mir::block::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_block::h7370a41d2cf00e4c
12: 0x7fdf6eba9498 - rustc_trans::mir::trans_mir::ha7607c24e74fe3fc
13: 0x7fdf6ebcacee - rustc_trans::trans_item::TransItem::define::h1e41c90c4e3659f0
14: 0x7fdf6eb42827 - rustc_trans::base::trans_crate::hd0c42f1c088c6870
15: 0x7fdf6fcebc10 - rustc_driver::driver::phase_4_translate_to_llvm::haac68055ca0e54a5
16: 0x7fdf6fcb9819 - rustc_driver::driver::compile_input::{{closure}}::ha32b4e7a1ff999dd
17: 0x7fdf6fcdf091 - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::h16429aca33e82f30
18: 0x7fdf6fcc85fe - rustc_driver::driver::phase_3_run_analysis_passes::h1b30709031b4f637
19: 0x7fdf6fcb7775 - rustc_driver::driver::compile_input::h71ecf4df05846d25
20: 0x7fdf6fd00b62 - rustc_driver::run_compiler::h180324a0694503f7
21: 0x7fdf6fc1547b - std::panicking::try::do_call::ha2c776608407d6f3
22: 0x7fdf6f95042a - __rust_maybe_catch_panic
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libpanic_unwind/lib.rs:98
23: 0x7fdf6fc37021 - <F as alloc::boxed::FnBox<A>>::call_box::h08c51ed50888bb2f
24: 0x7fdf6f9465c4 - std::sys::imp::thread::Thread::new::thread_start::he018521f53b24939
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/liballoc/boxed.rs:615
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/sys_common/thread.rs:21
at /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/libstd/sys/unix/thread.rs:84
25: 0x7fdf68784453 - start_thread
26: 0x7fdf6f6107de - __GI___clone
27: 0x0 - <unknown>