RustPython / RustPython/Parser

`malachite-bigint` feature failing to compile

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描述

I'm using aarch64-apple-darwin and running the following commands:

cargo new demo
cd demo
cargo add rustpython-parser --features malachite-bigint --no-default-features
cargo run

and am getting the following errors:

Error output 
error[E0433]: failed to resolve: could not find `num` in `malachite`
 --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:3:5
  |
3 |     num::{
  |     ^^^ could not find `num` in `malachite`

error[E0433]: failed to resolve: could not find `num` in `malachite`
 --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:3:5
  |
3 |     num::{
  |     ^^^ could not find `num` in `malachite`

error[E0432]: unresolved import `malachite::rounding_modes`
  --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:10:5
   |
10 |     rounding_modes::RoundingMode,
   |     ^^^^^^^^^^^^^^ could not find `rounding_modes` in `malachite`

error[E0432]: unresolved import `malachite::rounding_modes`
  --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:10:5
   |
10 |     rounding_modes::RoundingMode,
   |     ^^^^^^^^^^^^^^ could not find `rounding_modes` in `malachite`

   Compiling unicode_names2_generator v1.3.0
   Compiling rustpython-parser v0.4.0
error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:294:34
    |
294 |             let exp = malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:295:30
    |
295 |             <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(lhs.0, exp).into()
    |                              ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:305:32
    |
305 |                     malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:306:34
    |
306 |                 <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(&lhs.0, exp).into()
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:317:32
    |
317 |                     malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:318:34
    |
318 |                 <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(lhs.0, exp).into()
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:329:32
    |
329 |                     malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:330:34
    |
330 |                 <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(&lhs.0, exp).into()
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:109:1
    |
109 | forward_pow_biguint!(BigInt);
    | ---------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:277:30
    |
277 |             <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(lhs.0, rhs as _).into()
    |                              ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:135:1
    |
135 | apply_to_unsigneds!(forward_pow_primitive{BigInt, _});
    | ----------------------------------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_primitive` which comes from the expansion of the macro `apply_to_unsigneds` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:280:30
    |
280 |             <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(&lhs.0, rhs as _).into()
    |                              ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:135:1
    |
135 | apply_to_unsigneds!(forward_pow_primitive{BigInt, _});
    | ----------------------------------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_primitive` which comes from the expansion of the macro `apply_to_unsigneds` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:283:30
    |
283 |             <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(lhs.0, *rhs as _).into()
    |                              ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:135:1
    |
135 | apply_to_unsigneds!(forward_pow_primitive{BigInt, _});
    | ----------------------------------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_primitive` which comes from the expansion of the macro `apply_to_unsigneds` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:286:30
    |
286 |             <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(&lhs.0, *rhs as _).into()
    |                              ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:135:1
    |
135 | apply_to_unsigneds!(forward_pow_primitive{BigInt, _});
    | ----------------------------------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_primitive` which comes from the expansion of the macro `apply_to_unsigneds` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:210:37
    |
210 |         Self(<Integer as malachite::num::basic::traits::Zero>::ZERO)
    |                                     ^^^ could not find `num` in `malachite`
    |
help: consider importing this module
    |
1   + use malachite::base::num::basic::traits;
    |
help: if you import `traits`, refer to it directly
    |
210 -         Self(<Integer as malachite::num::basic::traits::Zero>::ZERO)
210 +         Self(<Integer as traits::Zero>::ZERO)
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:222:37
    |
222 |         Self(<Integer as malachite::num::basic::traits::One>::ONE)
    |                                     ^^^ could not find `num` in `malachite`
    |
help: consider importing this module
    |
1   + use malachite::base::num::basic::traits;
    |
help: if you import `traits`, refer to it directly
    |
222 -         Self(<Integer as malachite::num::basic::traits::One>::ONE)
222 +         Self(<Integer as traits::One>::ONE)
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/bigint.rs:516:32
    |
516 |         match <_ as malachite::num::arithmetic::traits::Sign>::sign(&self.0) {
    |                                ^^^ could not find `num` in `malachite`
    |
help: consider importing this module
    |
1   + use malachite::base::num::arithmetic::traits;
    |
help: if you import `traits`, refer to it directly
    |
516 -         match <_ as malachite::num::arithmetic::traits::Sign>::sign(&self.0) {
516 +         match <_ as traits::Sign>::sign(&self.0) {
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:294:34
    |
294 |             let exp = malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:295:30
    |
295 |             <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(lhs.0, exp).into()
    |                              ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:305:32
    |
305 |                     malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:306:34
    |
306 |                 <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(&lhs.0, exp).into()
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:317:32
    |
317 |                     malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:318:34
    |
318 |                 <_ as malachite::num::arithmetic::traits::Pow<u64>>::pow(lhs.0, exp).into()
    |                                  ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this module
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::arithmetic::traits;
    |

error[E0433]: failed to resolve: could not find `num` in `malachite`
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/macros.rs:329:32
    |
329 |                     malachite::num::conversion::traits::SaturatingFrom::saturating_from(&rhs.0);
    |                                ^^^ could not find `num` in `malachite`
    |
   ::: /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:82:1
    |
82  | forward_pow_biguint!(BigUint);
    | ----------------------------- in this macro invocation
    |
    = note: this error originates in the macro `forward_pow_biguint` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this trait
   --> /Users/oscar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/malachite-bigint-0.2.0/src/biguint.rs:1:1
    |
1   + use malachite::base::num::conversion::traits::SaturatingFrom;
    |

... truncated so it can fit on GitHub ...

The issue seems to be with the malachite-bigint feature which also happens to be a default feature so cargo add rustpython-parser has the same issue.

This issue can be worked around by using the alternative bigint feature (cargo add rustpython-parser --no-default-features --features num-bigint).

贡献指南

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从这里开始

  1. 先读完整个 Issue，再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

调研方向

在 aarch64-apple-darwin 上使用 cargo new、cargo add rustpython-parser --features malachite-bigint --no-default-features 和 cargo run 命令重现该失败。检查报告的 malachite-bigint-0.2.0 路径和依赖配置，然后验证该 feature 能够编译，并且 demo 能够在没有未解决的 malachite::num 和 rounding_modes 错误的情况下运行。

由索引模型根据 Issue 内容生成。

评估

技术栈
rust
领域
compilers
Issue 类型
缺陷
难度
3/5
预计耗时
1-2 天
活跃度
停滞
描述清晰度
需要澄清
新手友好度
35/100

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