rustc crashing

[ragingSloth]

I just built rust v.13 from master, but when I try to compile I experience a variety of errors. I experienced a panic trying to compile something with #![no_std].

$rustc `RUST_BACKTRACE=1` -O --target i686-unknown-linux-gnu --crate-type lib -o main.o --emit obj main.rs
error: requires `copy` lang_item
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: ErrorReported', /root/Downloads   /rust/src/libcore/result.rs:744

when I implement an empty Clone trait to fix the initial error the same command errors with.

...

<premain>: CommandLine Error: Option 'unroll-runtime' registered more than once!

<premain>: CommandLine Error: Option 'unroll-allow-partial' registered more than once!

<premain>: CommandLine Error: Option 'unroll-count' registered more than once!

<premain>: CommandLine Error: Option 'unroll-threshold' registered more than once!

<premain>: CommandLine Error: Option 'enable-lsr-phielim' registered more than once!

<premain>: CommandLine Error: Option 'rotation-max-header-size' registered more than once!
...

when I try to compile other programs I get illegal hardware instruction (core dumped). I ran it under gdb and it appears to be segfaulting.

$rustc test2.rs
zsh: illegal hardware instruction (core dumped)  rustc test2.rs
$gdb rustc
$(gdb) run ./test2.rs
Starting program: /usr/local/bin/rustc ./test2.rs
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffec7fef00 (LWP 3343)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffec7fef00 (LWP 3343)]
0x00007ffff4fa1a7d in llvm::StringRef::find_last_not_of(llvm::StringRef, unsigned long) const () from /usr/lib/libLLVM-3.5.so
$(gdb) backtrace
#0  0x00007ffff4fa1a7d in llvm::StringRef::find_last_not_of(llvm::StringRef, unsigned long) const () from /usr/lib/libLLVM-3.5.so
#1  0x00007ffff47a49a3 in llvm::object::ArchiveMemberHeader::getSize() const () from /usr/lib/libLLVM-3.5.so
#2  0x00007ffff47a4d3e in llvm::object::Archive::Child::Child(llvm::object::Archive const*, char const*) () from /usr/lib/libLLVM-3.5.so
#3  0x00007ffff47a4f6c in llvm::object::Archive::child_begin(bool) const () from /usr/lib/libLLVM-3.5.so
#4  0x00007fffefdb0684 in llvm::object::Archive::Archive(llvm::MemoryBufferRef, std::error_code&) () from /usr/local/lib/librustc_llvm-4e7c5e5c.so
#5  0x00007fffefdb0c3a in llvm::object::Archive::create(llvm::MemoryBufferRef) () from /usr/local/lib/librustc_llvm-4e7c5e5c.so
#6  0x00007fffef1eb1a8 in LLVMRustOpenArchive (path=<optimized out>) at /root/Downloads/rust/src/rustllvm/RustWrapper.cpp:727
#7  0x00007fffef1e7a89 in archive_ro::ArchiveRO::open::hd9ea27a23da59518eba () from /usr/local/lib/librustc_llvm-4e7c5e5c.so
#8  0x00007ffff24dc0ab in metadata::loader::get_metadata_section::closure.99492 () from /usr/local/lib/librustc-4e7c5e5c.so
#9  0x00007ffff686dfff in time::duration::Duration::span::h1fa98e12f2fbff11Ckm () from /usr/local/lib/libstd-4e7c5e5c.so
#10 0x00007ffff24db086 in metadata::loader::get_metadata_section::h24866dbeb8244841N4w () from /usr/local/lib/librustc-4e7c5e5c.so
#11 0x00007ffff24d9001 in metadata::loader::Context$LT$$x27a$GT$::extract_one::hd01bceaa88606378wDw () from /usr/local/lib/librustc-4e7c5e5c.so
#12 0x00007ffff24d246a in metadata::loader::Context$LT$$x27a$GT$::find_library_crate::h6fa989b5256c5d2bStw () from /usr/local/lib/librustc-4e7c5e5c.so
#13 0x00007ffff24cd371 in metadata::creader::PluginMetadataReader$LT$$x27a$GT$::read_plugin_metadata::h7a2e000abef9475d4kv () from /usr/local/lib/librustc-4e7c5e5c.so
#14 0x00007ffff2503619 in plugin::load::PluginLoader$LT$$x27a$GT$.Visitor$LT$$x27v$GT$::visit_view_item::ha8f421e39f6571fbldA ()from /usr/local/lib/librustc-4e7c5e5c.so
#15 0x00007ffff25029bb in plugin::load::load_plugins::ha983792bed43042fbcA () from /usr/local/lib/librustc-4e7c5e5c.so
#16 0x00007ffff6cc2644 in driver::phase_2_configure_and_expand::h144116dfb381b551Qha () from /usr/local/lib/librustc_driver-4e7c5e5c.so
#17 0x00007ffff6cb62f7 in driver::compile_input::hb468db38392e01fbpba () from /usr/local/lib/librustc_driver-4e7c5e5c.so
#18 0x00007ffff6d53fb8 in run_compiler::h5606ffa1609782a3kYb () from /usr/local/lib/librustc_driver-4e7c5e5c.so
#19 0x00007ffff6d528ac in run::closure.21400 () from /usr/local/lib/librustc_driver-4e7c5e5c.so
#20 0x00007ffff6d6427b in task::TaskBuilder::try_future::closure.22849 () from /usr/local/lib/librustc_driver-4e7c5e5c.so
#21 0x00007ffff686fa33 in task::TaskBuilder::spawn_internal::closure.30601 () from /usr/local/lib/libstd-4e7c5e5c.so
#22 0x00007ffff64df532 in task::Task::spawn::closure.5727 () from /usr/local/lib/librustrt-4e7c5e5c.so
#23 0x00007ffff6546a5c in rust_try_inner () from /usr/local/lib/librustrt-4e7c5e5c.so
#24 0x00007ffff6546a46 in rust_try () from /usr/local/lib/librustrt-4e7c5e5c.so
#25 0x00007ffff64df5e3 in unwind::try::hf5f28d8a62a70e27Tyc () from /usr/local/lib/librustrt-4e7c5e5c.so
#26 0x00007ffff64df3dc in task::Task::run::hcf1e7066a54e37dcfKb () from /usr/local/lib/librustrt4e7c5e5c.so
#27 0x00007ffff64df028 in task::Task::spawn::closure.5703 () from /usr/local/lib/librustrt-4e7c5e5c.so
#28 0x00007ffff64e0a25 in thread::thread_start::ha3032c35fbd5a75cw1b () from /usr/local/lib/librustrt-4e7c5e5c.so
#29 0x00007ffff3ef4314 in start_thread () from /usr/lib/libpthread.so.0
#30 0x00007ffff61b65bd in clone () from /usr/lib/libc.so.6

[arielb1]

Can you list the signatures of the lang-items you implemented? Implementing them improperly can cause compiler crashes/ICE-s.

[ragingSloth]

#[lang="sized"]
trait Sized {}

#[lang="copy"]
trait Copy {}

But I get illegal harware instruction for pretty much every program I try to compile.

[arielb1]

@ragingSloth

They need to be #[lang="sized"] pub trait Sized for Sized? {} and #[lang="copy"] pub trait Copy for Sized? {} (whitespace is unimportant, but you need pub and for Sized?, just copy the definitions from src/libcore/kinds.rs).

[tamird]

Needs reproducible test

[arielb1]

closing as irreproducible.