error: internal compiler error: translating unsupported cast: *mut f32 (cast_pointer) -> f32 (cast_float)

[GuillaumeGomez]

Hey, here's the error message given by rustc :

error: internal compiler error: translating unsupported cast: *mut f32 (cast_pointer) -> f32 (cast_float)
note: the compiler hit an unexpected failure path. 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' failed at 'Box<Any>', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libsyntax/diagnostic.rs:163

So here are my computer info :

• mint 17 Cinnamon (2.2.13)
• Linux kernel 3.13.0-24-generic
• hardware architecture: x86_64

rustc -v gives me :
rustc 0.11.0-pre-nightly (5d5c20647f45f2eb74f337e5434bbe63b0c43345 2014-07-03 21:46:47 +0000)

If you need any more information, please ask.

Good continuation !

[GuillaumeGomez]

Here is the backtrace :

stack backtrace:
   1:     0x2ba6720b5f50 - rt::backtrace::imp::write::h0a6e09d5ac6a396dQMp::v0.11.0
   2:     0x2ba6720bb890 - failure::on_fail::hb59ace9e326a1a4457p::v0.11.0
   3:     0x2ba671947cc0 - unwind::begin_unwind_inner::hf3d3b2017fc07a23cZd::v0.11.0
   4:     0x2ba673603e90 - unwind::begin_unwind::h5897199229657993564::v0.11.0
   5:     0x2ba673604830 - diagnostic::Handler::bug::h7e6dbd99aeae433dDgc::v0.11.0
   6:     0x2ba66ef57350 - driver::session::Session::bug::h3265e34a151b5575Xlr::v0.11.0
   7:     0x2ba66efd8d90 - middle::trans::expr::trans_imm_cast::he03de5a08ee3e7b1KQh::v0.11.0
   8:     0x2ba66efca840 - middle::trans::expr::trans_unadjusted::hd9a3a8c0c81f5db550f::v0.11.0
   9:     0x2ba66ef894c0 - middle::trans::expr::trans::hc2116d27852bd6d2DHf::v0.11.0
  10:     0x2ba66efc48e0 - middle::trans::callee::trans_args::hd2a2511dfbe94b6abef::v0.11.0
  11:     0x2ba66efbbb20 - middle::trans::callee::trans_call_inner::hdfdb8c30fa124095R1e::v0.11.0
  12:     0x2ba66efc1900 - middle::trans::callee::trans_call::h9df70b3aef437bdcZVe::v0.11.0
  13:     0x2ba66efcb640 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf749359ec6e2a160hvg::v0.11.0
  14:     0x2ba66ef874e0 - middle::trans::expr::trans_into::hf0a37465b961389bIDf::v0.11.0
  15:     0x2ba66f078a50 - middle::trans::_match::trans_match_inner::h21253cb4fd5b92c9uOt::v0.11.0
  16:     0x2ba66efcb640 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf749359ec6e2a160hvg::v0.11.0
  17:     0x2ba66ef874e0 - middle::trans::expr::trans_into::hf0a37465b961389bIDf::v0.11.0
  18:     0x2ba66ef87b10 - middle::trans::controlflow::trans_block::hecc22008fef2a1bd2ic::v0.11.0
  19:     0x2ba66efcb640 - middle::trans::expr::trans_rvalue_dps_unadjusted::hf749359ec6e2a160hvg::v0.11.0
  20:     0x2ba66ef874e0 - middle::trans::expr::trans_into::hf0a37465b961389bIDf::v0.11.0
  21:     0x2ba66ef87b10 - middle::trans::controlflow::trans_block::hecc22008fef2a1bd2ic::v0.11.0
  22:     0x2ba66f04a710 - middle::trans::base::trans_closure::h639d28c7bc97ae139tq::v0.11.0
  23:     0x2ba66ef58530 - middle::trans::base::trans_fn::he5cf57c39474f14caCq::v0.11.0
  24:     0x2ba66f04e620 - middle::trans::foreign::trans_rust_fn_with_foreign_abi::hb01b3dc1f75a84bamvy::v0.11.0
  25:     0x2ba66ef514a0 - middle::trans::base::trans_item::h17204c67e6746031BSq::v0.11.0
  26:     0x2ba66ef514a0 - middle::trans::base::trans_item::h17204c67e6746031BSq::v0.11.0
  27:     0x2ba66f05b300 - middle::trans::base::trans_crate::hfddcc2510b7c9311IMr::v0.11.0
  28:     0x2ba66f77fe80 - driver::driver::phase_4_translate_to_llvm::h6b5f55c3e1863d4cTuq::v0.11.0
  29:     0x2ba66f7773f0 - driver::driver::compile_input::hc5634315c7a145c8n8p::v0.11.0
  30:     0x2ba66f82af60 - driver::run_compiler::hae575e8dc5c8f87dVTs::v0.11.0
  31:     0x2ba66f82ae70 - driver::main_args::closure.117607
  32:     0x2ba66f83f010 - task::TaskBuilder<S>::try_future::closure.118749
  33:     0x2ba66f83ed00 - task::TaskBuilder<S>::spawn_internal::closure.118726
  34:     0x2ba66e9c0f40 - task::spawn_opts::closure.7519
  35:     0x2ba6719a01b0 - rust_try
  36:     0x2ba671944290 - unwind::try::hd5f4c2617b203e57BNd::v0.11.0
  37:     0x2ba671943fd0 - task::Task::run::headae25e22673ff0XYc::v0.11.0
  38:     0x2ba66e9c0d00 - task::spawn_opts::closure.7465
  39:     0x2ba671946af0 - thread::thread_start::hf8076cce1f95d94cvld::v0.11.0
  40:     0x2ba67271f0c0 - start_thread
  41:     0x2ba671d432d9 - __clone
  42:                0x0 - <unknown>

make: *** [rfmod] Error 101

[jdm]

What code were you building?

[GuillaumeGomez]

Well, I'm not sure about sure about the one in fault so here are the two :

extern "C" fn read_callback(dsp_state: *mut ffi::FMOD_DSP_STATE, in_buffer: *mut c_float, out_buffer: *mut c_float, length: c_uint, in_channels: c_int, out_channels: c_int) -> fmod::Result {
     unsafe {
         let mut v_in_buffer = Vec::from_slice(std::c_vec::CVec::new(in_buffer, length as uint * in_channels as uint + out_channels as uint).as_slice());
        ...
}

let mut ptr = Vec::from_elem(spectrum_size, 0f32);
ffi::FMOD_System_GetSpectrum(self.system, ptr.as_mut_ptr(), spectrum_size as c_int, channel_offset, window_type)

For the second one, the first argument is a c_float* which is filled inside the function. The code built before so that's kind of weird.

[jdm]

I would be surprised if those are at fault; the error should be coming from an explicit as expression that is casting from *mut f32 to f32.

[GuillaumeGomez]

Yes, you're totally right. Error from this code :

extern "C" fn get_parameter_callback(dsp_state: *mut ffi::FMOD_DSP_STATE, index: c_int, value: *mut c_float, value_str: *mut c_char) -> fmod::Result {
...
value as f32
...
}

I didn't pay attention to value type... Big mistake ! Anyway, the error is reported, thanks !

[jdm]

Yeah, this is still something that should not be an ICE :) We should definitely be catching this during the typechecking phase inside check_cast in typeck/check/mod.rs.