Cross compiling to 32-bit x86 macOS stable 1.15.1 causes compiler panic

[johnthagen]

Tried to cross compile my project rust-belt to 32-bit x86. On rust-belt commit johnthagen/rust-belt@55898ea.

OSX 10.11.6.

rustup show
Default host: x86_64-apple-darwin

installed toolchains
--------------------

stable-x86_64-apple-darwin (default)
nightly-x86_64-apple-darwin

installed targets for active toolchain
--------------------------------------

i686-apple-darwin
x86_64-apple-darwin

active toolchain
----------------

stable-x86_64-apple-darwin (default)
rustc 1.15.1 (021bd294c 2017-02-08)

RUST_BACKTRACE=1 cargo build --target=i686-apple-darwin
   Compiling bitflags v0.7.0
   Compiling bitflags v0.6.0
   Compiling adler32 v0.3.0
   Compiling num-traits v0.1.36
   Compiling interpolation v0.1.0
   Compiling color_quant v1.0.0
   Compiling read_color v0.1.0
   Compiling linked-hash-map v0.0.10
   Compiling glob v0.2.11
   Compiling piston-float v0.3.0
   Compiling byteorder v1.0.0
   Compiling log v0.3.6
   Compiling fnv v1.0.5
   Compiling sdl2-sys v0.27.2
   Compiling piston-texture v0.5.0
   Compiling odds v0.2.25
   Compiling scoped_threadpool v0.1.7
   Compiling pkg-config v0.3.9
   Compiling rustc-serialize v0.3.22
   Compiling lazy_static v0.2.2
   Compiling draw_state v0.6.0
   Compiling enum_primitive v0.1.1
   Compiling serde v0.8.23
   Compiling nodrop v0.1.8
   Compiling num-integer v0.1.32
   Compiling piston-viewport v0.3.0
   Compiling block v0.1.6
   Compiling xml-rs v0.3.5
   Compiling piston-shaders_graphics2d v0.3.1
   Compiling gfx_core v0.6.0
   Compiling khronos_api v1.0.0
   Compiling shader_version v0.2.1
   Compiling num-iter v0.1.32
   Compiling num-rational v0.1.35
   Compiling serde v0.7.15
   Compiling core-foundation-sys v0.2.3
   Compiling num v0.1.36
   Compiling inflate v0.1.1
   Compiling vecmath v0.3.0
   Compiling lzw v0.10.0
   Compiling piston2d-graphics v0.21.1
   Compiling gif v0.9.0
   Compiling bitflags v0.3.3
   Compiling gl_generator v0.5.2
   Compiling deflate v0.7.2
   Compiling byteorder v0.4.2
   Compiling stb_truetype v0.2.0
   Compiling arrayvec v0.3.20
   Compiling pistoncore-input v0.17.0
   Compiling libc v0.2.20
   Compiling rusttype v0.2.1
   Compiling current v0.1.2
   Compiling gl v0.6.1
   Compiling gleam v0.2.32
   Compiling gfx_gl v0.3.1
   Compiling malloc_buf v0.0.6
   Compiling objc v0.2.2
   Compiling shared_library v0.1.5
   Compiling pistoncore-window v0.26.0
   Compiling core-foundation v0.2.3
   Compiling rand v0.3.15
   Compiling png v0.6.2
   Compiling core-graphics v0.3.2
   Compiling core-graphics v0.4.2
   Compiling cocoa v0.3.3
   Compiling cocoa v0.5.2
   Compiling glutin v0.7.4
   Compiling deque v0.3.1
   Compiling time v0.1.36
error: internal compiler error: /Users/rustbuild/src/rust-buildbot/slave/stable-dist-rustc-mac/build/src/librustc_trans/mir/constant.rs:702: Unexpected non-fat-pointer operand

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 'Box<Any>', /Users/rustbuild/src/rust-buildbot/slave/stable-dist-rustc-mac/build/src/librustc_errors/lib.rs:423
stack backtrace:
   1:        0x10c2534ca - std::sys::imp::backtrace::tracing::imp::write::hd3b65cdfe843284c
   2:        0x10c25fb4f - std::panicking::default_hook::{{closure}}::hf2b7428652613d83
   3:        0x10c25f6fd - std::panicking::default_hook::h5da8f27db5582938
   4:        0x10c260016 - std::panicking::rust_panic_with_hook::hcef1e67c646c6802
   5:        0x10c06c79a - std::panicking::begin_panic::heb8e05575db73098
   6:        0x10c0810f4 - rustc_errors::Handler::bug::h31175dae0c08edd0
   7:        0x1092a138c - rustc::session::opt_span_bug_fmt::{{closure}}::hb3011a1ab2efe7c5
   8:        0x1092a0e49 - rustc::session::opt_span_bug_fmt::hcb9223dc6b534a5b
   9:        0x1092a09ca - rustc::session::bug_fmt::h92473e45e697c482
  10:        0x1084c30a4 - rustc_trans::mir::constant::MirConstContext::const_rvalue::he9618774abcdee3a
  11:        0x1084bde2e - rustc_trans::mir::constant::MirConstContext::trans::hf43001608ccab145
  12:        0x1084bdba1 - rustc_trans::mir::constant::MirConstContext::trans_def::habfc95c1ebaeb9f2
  13:        0x1084c4bed - rustc_trans::mir::constant::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_constant::h27b41ae6ad74a03e
  14:        0x1084c6c0c - rustc_trans::mir::operand::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_operand::hc01a1be0adcb3b05
  15:        0x1084c71e9 - rustc_trans::mir::rvalue::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_rvalue::ha583054fa6b1fb22
  16:        0x1084b5808 - rustc_trans::mir::block::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_block::h7b22704adf2aea7b
  17:        0x1084b3716 - rustc_trans::mir::trans_mir::h25b3be70654d8c6d
  18:        0x1084d57fc - rustc_trans::trans_item::TransItem::define::h228b4a009b417e80
  19:        0x10844c0c0 - rustc_trans::base::trans_crate::h0ef15a01f7d9c447
  20:        0x10826205b - rustc_driver::driver::phase_4_translate_to_llvm::he72e34dcc3bff444
  21:        0x108231ce6 - rustc_driver::driver::compile_input::{{closure}}::h43371a098d81924e
  22:        0x10826080f - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::hc76c3449d8a13138
  23:        0x108249624 - rustc_driver::driver::phase_3_run_analysis_passes::hac400312f738d13f
  24:        0x10822fcfa - rustc_driver::driver::compile_input::ha5e7e88542653c4b
  25:        0x10827677b - rustc_driver::run_compiler::h606af939ee2c21bf
  26:        0x108196938 - std::panicking::try::do_call::he590fc377f9781bb
  27:        0x10c2625ca - __rust_maybe_catch_panic
  28:        0x1081b8ccf - <F as alloc::boxed::FnBox<A>>::call_box::hb6e07c708232b9b0
  29:        0x10c25ec94 - std::sys::imp::thread::Thread::new::thread_start::hf410a68837ea407b
  30:     0x7fff92ca799c - _pthread_body
  31:     0x7fff92ca7919 - _pthread_start

Build failed, waiting for other jobs to finish...
error: internal compiler error: /Users/rustbuild/src/rust-buildbot/slave/stable-dist-rustc-mac/build/src/librustc_trans/mir/constant.rs:702: Unexpected non-fat-pointer operand

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 'Box<Any>', /Users/rustbuild/src/rust-buildbot/slave/stable-dist-rustc-mac/build/src/librustc_errors/lib.rs:423
stack backtrace:
   1:        0x1048594ca - std::sys::imp::backtrace::tracing::imp::write::hd3b65cdfe843284c
   2:        0x104865b4f - std::panicking::default_hook::{{closure}}::hf2b7428652613d83
   3:        0x1048656fd - std::panicking::default_hook::h5da8f27db5582938
   4:        0x104866016 - std::panicking::rust_panic_with_hook::hcef1e67c646c6802
   5:        0x10466c79a - std::panicking::begin_panic::heb8e05575db73098
   6:        0x1046810f4 - rustc_errors::Handler::bug::h31175dae0c08edd0
   7:        0x1018b838c - rustc::session::opt_span_bug_fmt::{{closure}}::hb3011a1ab2efe7c5
   8:        0x1018b7e49 - rustc::session::opt_span_bug_fmt::hcb9223dc6b534a5b
   9:        0x1018b79ca - rustc::session::bug_fmt::h92473e45e697c482
  10:        0x100ae80a4 - rustc_trans::mir::constant::MirConstContext::const_rvalue::he9618774abcdee3a
  11:        0x100ae2e2e - rustc_trans::mir::constant::MirConstContext::trans::hf43001608ccab145
  12:        0x100ae2ba1 - rustc_trans::mir::constant::MirConstContext::trans_def::habfc95c1ebaeb9f2
  13:        0x100ae5255 - rustc_trans::mir::constant::MirConstContext::const_operand::h8c964f74760f2ba7
  14:        0x100ae56d3 - rustc_trans::mir::constant::MirConstContext::const_rvalue::he9618774abcdee3a
  15:        0x100ae2e2e - rustc_trans::mir::constant::MirConstContext::trans::hf43001608ccab145
  16:        0x100ae2ba1 - rustc_trans::mir::constant::MirConstContext::trans_def::habfc95c1ebaeb9f2
  17:        0x100ae9bed - rustc_trans::mir::constant::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_constant::h27b41ae6ad74a03e
  18:        0x100aebc0c - rustc_trans::mir::operand::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_operand::hc01a1be0adcb3b05
  19:        0x100aec1e9 - rustc_trans::mir::rvalue::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_rvalue::ha583054fa6b1fb22
  20:        0x100ada808 - rustc_trans::mir::block::<impl rustc_trans::mir::MirContext<'bcx, 'tcx>>::trans_block::h7b22704adf2aea7b
  21:        0x100ad8716 - rustc_trans::mir::trans_mir::h25b3be70654d8c6d
  22:        0x100afa7fc - rustc_trans::trans_item::TransItem::define::h228b4a009b417e80
  23:        0x100a710c0 - rustc_trans::base::trans_crate::h0ef15a01f7d9c447
  24:        0x10089005b - rustc_driver::driver::phase_4_translate_to_llvm::he72e34dcc3bff444
  25:        0x10085fce6 - rustc_driver::driver::compile_input::{{closure}}::h43371a098d81924e
  26:        0x10088e80f - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::hc76c3449d8a13138
  27:        0x100877624 - rustc_driver::driver::phase_3_run_analysis_passes::hac400312f738d13f
  28:        0x10085dcfa - rustc_driver::driver::compile_input::ha5e7e88542653c4b
  29:        0x1008a477b - rustc_driver::run_compiler::h606af939ee2c21bf
  30:        0x1007c4938 - std::panicking::try::do_call::he590fc377f9781bb
  31:        0x1048685ca - __rust_maybe_catch_panic
  32:        0x1007e6ccf - <F as alloc::boxed::FnBox<A>>::call_box::hb6e07c708232b9b0
  33:        0x104864c94 - std::sys::imp::thread::Thread::new::thread_start::hf410a68837ea407b
  34:     0x7fff92ca799c - _pthread_body
  35:     0x7fff92ca7919 - _pthread_start

Build failed, waiting for other jobs to finish...
error: Could not compile `cocoa`.

[nagisa]

Likely duplicate of #38942. Please try with stable/beta.

[johnthagen]

@nagisa, what do you mean? This was run with stable.

[nagisa]

Err obviously I meant to tell to try with beta or nightly.

[johnthagen]

The compiler bug did not manifest on the following compiler versions using --target=i686-apple-darwin

nightly-x86_64-apple-darwin (default)
rustc 1.17.0-nightly (6f10e2f63 2017-03-14)

beta-x86_64-apple-darwin (default)
rustc 1.17.0-beta.1 (408d49e60 2017-03-14)

Though winit v0.5.10 failed to compile (not a compiler bug), so the entire build did not complete. But cocoa did compile correctly (where the particular compiler bug reported manifested).

So it seems this has been fixed upstream.

[Mark-Simulacrum]

I cannot reproduce today (getting some errors in winit, yes, but no ICEs) -- I'm going to close this.