Build results for nightly-2023-05-15 target arm64_32-apple-watchos core

error
   Compiling compiler_builtins v0.1.91
   Compiling core v0.0.0 (/var/lib/does-it-build/.rustup/toolchains/nightly-2023-05-15-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling rustc-std-workspace-core v1.99.0 (/var/lib/does-it-build/.rustup/toolchains/nightly-2023-05-15-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: Error("unimplemented architecture Aarch64_Ilp32")', compiler/rustc_codegen_ssa/src/back/metadata.rs:340:19
stack backtrace:
   0:     0x7f0fa291b6e1 - std::backtrace_rs::backtrace::libunwind::trace::h4354896f1663baaf
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f0fa291b6e1 - std::backtrace_rs::backtrace::trace_unsynchronized::h8ac49f89c23585dd
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f0fa291b6e1 - std::sys_common::backtrace::_print_fmt::h9f5f16b3ef080000
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f0fa291b6e1 - ::fmt::hcfed927151d1ad83
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f0fa297bbdf - core::fmt::rt::Argument::fmt::h12fb43eea2fe23a8
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/fmt/rt.rs:138:9
   5:     0x7f0fa297bbdf - core::fmt::write::hcf94a34baaaea06f
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f0fa290e941 - std::io::Write::write_fmt::h60003491edc2e074
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/io/mod.rs:1712:15
   7:     0x7f0fa291b4f5 - std::sys_common::backtrace::_print::h9a8311322b9d8667
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f0fa291b4f5 - std::sys_common::backtrace::print::h8503eaeeae92ea08
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f0fa291e177 - std::panicking::default_hook::{{closure}}::h36a123b73b99c0f3
  10:     0x7f0fa291df64 - std::panicking::default_hook::ha2efb9fc5f628e61
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:288:9
  11:     0x7f0fa5ac87db - rustc_driver_impl[64b7dd1911194932]::install_ice_hook::{closure#0}
  12:     0x7f0fa291e897 -  as core::ops::function::Fn>::call::h250e911c4e8d011a
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1999:9
  13:     0x7f0fa291e897 - std::panicking::rust_panic_with_hook::h5d9e02f555bc48d2
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:695:13
  14:     0x7f0fa291e617 - std::panicking::begin_panic_handler::{{closure}}::hbb00bd8fdd3417d9
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:582:13
  15:     0x7f0fa291bb26 - std::sys_common::backtrace::__rust_end_short_backtrace::ha9ceea58b8cf1deb
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:150:18
  16:     0x7f0fa291e382 - rust_begin_unwind
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:578:5
  17:     0x7f0fa2977e63 - core::panicking::panic_fmt::h1df8faa11491e0c5
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/panicking.rs:67:14
  18:     0x7f0fa2978483 - core::result::unwrap_failed::h4175d949b4f9e8b9
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/result.rs:1651:5
  19:     0x7f0fa51e698d - rustc_codegen_ssa[4be2cc31188fb7c9]::back::metadata::create_wrapper_file
  20:     0x7f0fa51e509c - rustc_codegen_ssa[4be2cc31188fb7c9]::back::link::link_rlib
  21:     0x7f0fa51e1d62 - rustc_codegen_ssa[4be2cc31188fb7c9]::back::link::link_binary
  22:     0x7f0fa51e07d4 - ::link
  23:     0x7f0fa50720f6 - ::link
  24:     0x7f0fa505dde5 - >::set::, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>
  25:     0x7f0fa505d156 - std[d9d2839bce1dd559]::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>
  26:     0x7f0fa505cf05 - <::spawn_unchecked_, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#1} as core[b4a8d54be4c63c12]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  27:     0x7f0fa2928d45 -  as core::ops::function::FnOnce>::call_once::h0ee7a0a44efbcb8b
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1985:9
  28:     0x7f0fa2928d45 -  as core::ops::function::FnOnce>::call_once::h8f984f8b1c075279
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1985:9
  29:     0x7f0fa2928d45 - std::sys::unix::thread::Thread::new::thread_start::h054937194df87b6d
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys/unix/thread.rs:108:17
  30:     0x7f0fa26c8272 - start_thread
  31:     0x7f0fa2743dec - __GI___clone3
  32:                0x0 - 

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.71.0-nightly (18bfe5d8a 2023-05-14) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -Z force-unstable-if-unmarked

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `rustc-std-workspace-core` (lib)
warning: build failed, waiting for other jobs to finish...
thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: Error("unimplemented architecture Aarch64_Ilp32")', compiler/rustc_codegen_ssa/src/back/metadata.rs:340:19
stack backtrace:
   0:     0x7f035ff1b6e1 - std::backtrace_rs::backtrace::libunwind::trace::h4354896f1663baaf
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f035ff1b6e1 - std::backtrace_rs::backtrace::trace_unsynchronized::h8ac49f89c23585dd
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f035ff1b6e1 - std::sys_common::backtrace::_print_fmt::h9f5f16b3ef080000
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f035ff1b6e1 - ::fmt::hcfed927151d1ad83
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f035ff7bbdf - core::fmt::rt::Argument::fmt::h12fb43eea2fe23a8
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/fmt/rt.rs:138:9
   5:     0x7f035ff7bbdf - core::fmt::write::hcf94a34baaaea06f
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f035ff0e941 - std::io::Write::write_fmt::h60003491edc2e074
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/io/mod.rs:1712:15
   7:     0x7f035ff1b4f5 - std::sys_common::backtrace::_print::h9a8311322b9d8667
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f035ff1b4f5 - std::sys_common::backtrace::print::h8503eaeeae92ea08
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f035ff1e177 - std::panicking::default_hook::{{closure}}::h36a123b73b99c0f3
  10:     0x7f035ff1df64 - std::panicking::default_hook::ha2efb9fc5f628e61
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:288:9
  11:     0x7f03630c87db - rustc_driver_impl[64b7dd1911194932]::install_ice_hook::{closure#0}
  12:     0x7f035ff1e897 -  as core::ops::function::Fn>::call::h250e911c4e8d011a
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1999:9
  13:     0x7f035ff1e897 - std::panicking::rust_panic_with_hook::h5d9e02f555bc48d2
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:695:13
  14:     0x7f035ff1e617 - std::panicking::begin_panic_handler::{{closure}}::hbb00bd8fdd3417d9
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:582:13
  15:     0x7f035ff1bb26 - std::sys_common::backtrace::__rust_end_short_backtrace::ha9ceea58b8cf1deb
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:150:18
  16:     0x7f035ff1e382 - rust_begin_unwind
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:578:5
  17:     0x7f035ff77e63 - core::panicking::panic_fmt::h1df8faa11491e0c5
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/panicking.rs:67:14
  18:     0x7f035ff78483 - core::result::unwrap_failed::h4175d949b4f9e8b9
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/result.rs:1651:5
  19:     0x7f03627e698d - rustc_codegen_ssa[4be2cc31188fb7c9]::back::metadata::create_wrapper_file
  20:     0x7f03627e509c - rustc_codegen_ssa[4be2cc31188fb7c9]::back::link::link_rlib
  21:     0x7f03627e1d62 - rustc_codegen_ssa[4be2cc31188fb7c9]::back::link::link_binary
  22:     0x7f03627e07d4 - ::link
  23:     0x7f03626720f6 - ::link
  24:     0x7f036265dde5 - >::set::, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>
  25:     0x7f036265d156 - std[d9d2839bce1dd559]::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>
  26:     0x7f036265cf05 - <::spawn_unchecked_, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#1} as core[b4a8d54be4c63c12]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  27:     0x7f035ff28d45 -  as core::ops::function::FnOnce>::call_once::h0ee7a0a44efbcb8b
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1985:9
  28:     0x7f035ff28d45 -  as core::ops::function::FnOnce>::call_once::h8f984f8b1c075279
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1985:9
  29:     0x7f035ff28d45 - std::sys::unix::thread::Thread::new::thread_start::h054937194df87b6d
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys/unix/thread.rs:108:17
  30:     0x7f035fcc8272 - start_thread
  31:     0x7f035fd43dec - __GI___clone3
  32:                0x0 - 

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.71.0-nightly (18bfe5d8a 2023-05-14) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -Z force-unstable-if-unmarked

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `compiler_builtins` (lib)
thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: Error("unimplemented architecture Aarch64_Ilp32")', compiler/rustc_codegen_ssa/src/back/metadata.rs:340:19
stack backtrace:
   0:     0x7fc64282c6e1 - std::backtrace_rs::backtrace::libunwind::trace::h4354896f1663baaf
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fc64282c6e1 - std::backtrace_rs::backtrace::trace_unsynchronized::h8ac49f89c23585dd
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fc64282c6e1 - std::sys_common::backtrace::_print_fmt::h9f5f16b3ef080000
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7fc64282c6e1 - ::fmt::hcfed927151d1ad83
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fc64288cbdf - core::fmt::rt::Argument::fmt::h12fb43eea2fe23a8
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/fmt/rt.rs:138:9
   5:     0x7fc64288cbdf - core::fmt::write::hcf94a34baaaea06f
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/fmt/mod.rs:1094:21
   6:     0x7fc64281f941 - std::io::Write::write_fmt::h60003491edc2e074
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/io/mod.rs:1712:15
   7:     0x7fc64282c4f5 - std::sys_common::backtrace::_print::h9a8311322b9d8667
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7fc64282c4f5 - std::sys_common::backtrace::print::h8503eaeeae92ea08
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7fc64282f177 - std::panicking::default_hook::{{closure}}::h36a123b73b99c0f3
  10:     0x7fc64282ef64 - std::panicking::default_hook::ha2efb9fc5f628e61
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:288:9
  11:     0x7fc6414c87db - rustc_driver_impl[64b7dd1911194932]::install_ice_hook::{closure#0}
  12:     0x7fc64282f897 -  as core::ops::function::Fn>::call::h250e911c4e8d011a
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1999:9
  13:     0x7fc64282f897 - std::panicking::rust_panic_with_hook::h5d9e02f555bc48d2
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:695:13
  14:     0x7fc64282f617 - std::panicking::begin_panic_handler::{{closure}}::hbb00bd8fdd3417d9
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:582:13
  15:     0x7fc64282cb26 - std::sys_common::backtrace::__rust_end_short_backtrace::ha9ceea58b8cf1deb
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys_common/backtrace.rs:150:18
  16:     0x7fc64282f382 - rust_begin_unwind
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/panicking.rs:578:5
  17:     0x7fc642888e63 - core::panicking::panic_fmt::h1df8faa11491e0c5
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/panicking.rs:67:14
  18:     0x7fc642889483 - core::result::unwrap_failed::h4175d949b4f9e8b9
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/core/src/result.rs:1651:5
  19:     0x7fc640be698d - rustc_codegen_ssa[4be2cc31188fb7c9]::back::metadata::create_wrapper_file
  20:     0x7fc640be509c - rustc_codegen_ssa[4be2cc31188fb7c9]::back::link::link_rlib
  21:     0x7fc640be1d62 - rustc_codegen_ssa[4be2cc31188fb7c9]::back::link::link_binary
  22:     0x7fc640be07d4 - ::link
  23:     0x7fc640a720f6 - ::link
  24:     0x7fc640a5dde5 - >::set::, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>
  25:     0x7fc640a5d156 - std[d9d2839bce1dd559]::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>
  26:     0x7fc640a5cf05 - <::spawn_unchecked_, rustc_driver_impl[64b7dd1911194932]::run_compiler::{closure#1}>::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b4a8d54be4c63c12]::result::Result<(), rustc_span[f3562a9d228bc34b]::ErrorGuaranteed>>::{closure#1} as core[b4a8d54be4c63c12]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  27:     0x7fc642839d45 -  as core::ops::function::FnOnce>::call_once::h0ee7a0a44efbcb8b
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1985:9
  28:     0x7fc642839d45 -  as core::ops::function::FnOnce>::call_once::h8f984f8b1c075279
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/alloc/src/boxed.rs:1985:9
  29:     0x7fc642839d45 - std::sys::unix::thread::Thread::new::thread_start::h054937194df87b6d
                               at /rustc/18bfe5d8a9ca0e226171e98f8f4ef071790f3352/library/std/src/sys/unix/thread.rs:108:17
  30:     0x7fc63e2a1272 - start_thread
  31:     0x7fc63e31cdec - __GI___clone3
  32:                0x0 - 

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.71.0-nightly (18bfe5d8a 2023-05-14) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -Z force-unstable-if-unmarked

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `core` (lib)