[INFO] updating cached repository jsanders/rust-bignum
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jsanders/rust-bignum
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jsanders/rust-bignum" "work/ex/beta-1.38-1/sources/1.37.0/gh/jsanders/rust-bignum"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jsanders/rust-bignum'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jsanders/rust-bignum" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jsanders/rust-bignum"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jsanders/rust-bignum'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3fdf3dc4e0429afd7b8322395690b0f7d41106cb
[INFO] sha for GitHub repo jsanders/rust-bignum: 3fdf3dc4e0429afd7b8322395690b0f7d41106cb
[INFO] validating manifest of jsanders/rust-bignum on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jsanders/rust-bignum on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jsanders/rust-bignum
[INFO] removed path dependency rust-gmp from jsanders/rust-bignum
[INFO] finished frobbing jsanders/rust-bignum
[INFO] frobbed toml for jsanders/rust-bignum written to work/ex/beta-1.38-1/sources/1.37.0/gh/jsanders/rust-bignum/Cargo.toml
[INFO] started frobbing jsanders/rust-bignum
[INFO] removed path dependency rust-gmp from jsanders/rust-bignum
[INFO] finished frobbing jsanders/rust-bignum
[INFO] frobbed toml for jsanders/rust-bignum written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jsanders/rust-bignum/Cargo.toml
[INFO] crate jsanders/rust-bignum already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jsanders/rust-bignum/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/num`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/num`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing jsanders/rust-bignum against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jsanders/rust-bignum:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f55976d560ef9b3d7e87c7f40418f027c66f42f743225f11db9b054eef7691db
[INFO] running `"docker" "start" "-a" "f55976d560ef9b3d7e87c7f40418f027c66f42f743225f11db9b054eef7691db"`
[INFO] [stderr] warning: dependency (rust-gmp) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling rust-gmp v0.5.0
[INFO] [stderr]    Compiling num v0.2.0 (https://github.com/rust-lang/num#f0022772)
[INFO] [stderr]    Compiling rust-bignum v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:78:29
[INFO] [stderr]    |
[INFO] [stderr] 78 |   macro_rules! impl_to_biguint(
[INFO] [stderr]    |  _____________________________^
[INFO] [stderr] 79 | |     ($T:ty, $from_ty:path) => {
[INFO] [stderr] 80 | |         impl ToBigUint for $T {
[INFO] [stderr] 81 | |             fn to_biguint(&self) -> Option<BigUint> {
[INFO] [stderr] ...  |
[INFO] [stderr] 85 | |     }
[INFO] [stderr] 86 | | )
[INFO] [stderr]    | |_^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 78 | macro_rules! impl_to_biguint {
[INFO] [stderr] 79 |     ($T:ty, $from_ty:path) => {
[INFO] [stderr] 80 |         impl ToBigUint for $T {
[INFO] [stderr] 81 |             fn to_biguint(&self) -> Option<BigUint> {
[INFO] [stderr] 82 |                 $from_ty(*self)
[INFO] [stderr] 83 |             }
[INFO] [stderr]  ...
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 86 | );
[INFO] [stderr]    |  ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:88:17
[INFO] [stderr]    |
[INFO] [stderr] 88 | impl_to_biguint!(int,  FromPrimitive::from_int)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 88 | impl_to_biguint! {int,  FromPrimitive::from_int}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 88 | impl_to_biguint!(int,  FromPrimitive::from_int);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:89:17
[INFO] [stderr]    |
[INFO] [stderr] 89 | impl_to_biguint!(i8,   FromPrimitive::from_i8)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 89 | impl_to_biguint! {i8,   FromPrimitive::from_i8}
[INFO] [stderr]    |                  ^                            ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 89 | impl_to_biguint!(i8,   FromPrimitive::from_i8);
[INFO] [stderr]    |                                               ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:90:17
[INFO] [stderr]    |
[INFO] [stderr] 90 | impl_to_biguint!(i16,  FromPrimitive::from_i16)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 90 | impl_to_biguint! {i16,  FromPrimitive::from_i16}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 90 | impl_to_biguint!(i16,  FromPrimitive::from_i16);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:91:17
[INFO] [stderr]    |
[INFO] [stderr] 91 | impl_to_biguint!(i32,  FromPrimitive::from_i32)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 91 | impl_to_biguint! {i32,  FromPrimitive::from_i32}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 91 | impl_to_biguint!(i32,  FromPrimitive::from_i32);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 | impl_to_biguint!(i64,  FromPrimitive::from_i64)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 92 | impl_to_biguint! {i64,  FromPrimitive::from_i64}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 92 | impl_to_biguint!(i64,  FromPrimitive::from_i64);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:93:17
[INFO] [stderr]    |
[INFO] [stderr] 93 | impl_to_biguint!(uint, FromPrimitive::from_uint)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 93 | impl_to_biguint! {uint, FromPrimitive::from_uint}
[INFO] [stderr]    |                  ^                              ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 93 | impl_to_biguint!(uint, FromPrimitive::from_uint);
[INFO] [stderr]    |                                                 ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 | impl_to_biguint!(u8,   FromPrimitive::from_u8)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 94 | impl_to_biguint! {u8,   FromPrimitive::from_u8}
[INFO] [stderr]    |                  ^                            ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 94 | impl_to_biguint!(u8,   FromPrimitive::from_u8);
[INFO] [stderr]    |                                               ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:95:17
[INFO] [stderr]    |
[INFO] [stderr] 95 | impl_to_biguint!(u16,  FromPrimitive::from_u16)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 95 | impl_to_biguint! {u16,  FromPrimitive::from_u16}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 95 | impl_to_biguint!(u16,  FromPrimitive::from_u16);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:96:17
[INFO] [stderr]    |
[INFO] [stderr] 96 | impl_to_biguint!(u32,  FromPrimitive::from_u32)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 96 | impl_to_biguint! {u32,  FromPrimitive::from_u32}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 96 | impl_to_biguint!(u32,  FromPrimitive::from_u32);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: macros that expand to items must be delimited with braces or followed by a semicolon
[INFO] [stderr]   --> src/bignum/lib.rs:97:17
[INFO] [stderr]    |
[INFO] [stderr] 97 | impl_to_biguint!(u64,  FromPrimitive::from_u64)
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: change the delimiters to curly braces
[INFO] [stderr]    |
[INFO] [stderr] 97 | impl_to_biguint! {u64,  FromPrimitive::from_u64}
[INFO] [stderr]    |                  ^                             ^
[INFO] [stderr] help: add a semicolon
[INFO] [stderr]    |
[INFO] [stderr] 97 | impl_to_biguint!(u64,  FromPrimitive::from_u64);
[INFO] [stderr]    |                                                ^
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:365:19
[INFO] [stderr]     |
[INFO] [stderr] 365 |         let two = 2u.to_biguint().unwrap();
[INFO] [stderr]     |                   ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:390:21
[INFO] [stderr]     |
[INFO] [stderr] 390 |         let three = 3u.to_biguint().unwrap();
[INFO] [stderr]     |                     ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:396:21
[INFO] [stderr]     |
[INFO] [stderr] 396 |         let three = 3u.to_biguint().unwrap();
[INFO] [stderr]     |                     ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:397:20
[INFO] [stderr]     |
[INFO] [stderr] 397 |         let four = 4u.to_biguint().unwrap();
[INFO] [stderr]     |                    ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:403:19
[INFO] [stderr]     |
[INFO] [stderr] 403 |         let two = 2u.to_biguint().unwrap();
[INFO] [stderr]     |                   ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:404:24
[INFO] [stderr]     |
[INFO] [stderr] 404 |         let also_two = 2u.to_biguint().unwrap();
[INFO] [stderr]     |                        ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `u` for integer literal
[INFO] [stderr]    --> src/bignum/lib.rs:405:21
[INFO] [stderr]     |
[INFO] [stderr] 405 |         let three = 3u.to_biguint().unwrap();
[INFO] [stderr]     |                     ^^ invalid suffix `u`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: non-builtin inner attributes are unstable
[INFO] [stderr]  --> src/bignum/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![comment = "Bignum library for Rust"]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/54726
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: The attribute `comment` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]  --> src/bignum/lib.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![comment = "Bignum library for Rust"]
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: The attribute `deriving` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]   --> src/bignum/lib.rs:21:3
[INFO] [stderr]    |
[INFO] [stderr] 21 | #[deriving(Clone, PartialEq, Eq, PartialOrd, Ord, Zero)]
[INFO] [stderr]    |   ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: The attribute `deriving` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]    --> src/bignum/lib.rs:205:3
[INFO] [stderr]     |
[INFO] [stderr] 205 | #[deriving(Clone, PartialEq, Eq, PartialOrd, Ord, Zero)]
[INFO] [stderr]     |   ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `gmp::Mpz`, `gmp::RandState`
[INFO] [stderr]   --> src/bignum/lib.rs:13:11
[INFO] [stderr]    |
[INFO] [stderr] 13 | use gmp::{Mpz, RandState};
[INFO] [stderr]    |           ^^^  ^^^^^^^^^ no `RandState` in the root
[INFO] [stderr]    |           |
[INFO] [stderr]    |           no `Mpz` in the root
[INFO] [stderr]    |           help: a similar name exists in the module: `mpz`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::from_str`
[INFO] [stderr]   --> src/bignum/lib.rs:15:10
[INFO] [stderr]    |
[INFO] [stderr] 15 | use std::from_str::FromStr;
[INFO] [stderr]    |          ^^^^^^^^ could not find `from_str` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `std::num::One`, `std::num::Zero`, `std::num::ToStrRadix`
[INFO] [stderr]   --> src/bignum/lib.rs:16:16
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::num::{One, Zero, ToStrRadix};
[INFO] [stderr]    |                ^^^  ^^^^  ^^^^^^^^^^ no `ToStrRadix` in `num`
[INFO] [stderr]    |                |    |
[INFO] [stderr]    |                |    no `Zero` in `num`
[INFO] [stderr]    |                no `One` in `num`
[INFO] [stderr] 
[INFO] [stderr] error: cannot find macro `fail!` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:165:32
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn neg(&self) -> BigUint { fail!() }
[INFO] [stderr]     |                                ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:54:32
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let mpz: Option<Mpz> = FromPrimitive::from_u64(other);
[INFO] [stderr]    |                                ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:65:36
[INFO] [stderr]    |
[INFO] [stderr] 65 |             let mpz: Option<Mpz> = FromPrimitive::from_i64(other);
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:88:24
[INFO] [stderr]    |
[INFO] [stderr] 88 | impl_to_biguint!(int,  FromPrimitive::from_int)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:89:24
[INFO] [stderr]    |
[INFO] [stderr] 89 | impl_to_biguint!(i8,   FromPrimitive::from_i8)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:90:24
[INFO] [stderr]    |
[INFO] [stderr] 90 | impl_to_biguint!(i16,  FromPrimitive::from_i16)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:91:24
[INFO] [stderr]    |
[INFO] [stderr] 91 | impl_to_biguint!(i32,  FromPrimitive::from_i32)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:92:24
[INFO] [stderr]    |
[INFO] [stderr] 92 | impl_to_biguint!(i64,  FromPrimitive::from_i64)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:93:24
[INFO] [stderr]    |
[INFO] [stderr] 93 | impl_to_biguint!(uint, FromPrimitive::from_uint)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:94:24
[INFO] [stderr]    |
[INFO] [stderr] 94 | impl_to_biguint!(u8,   FromPrimitive::from_u8)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:95:24
[INFO] [stderr]    |
[INFO] [stderr] 95 | impl_to_biguint!(u16,  FromPrimitive::from_u16)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:96:24
[INFO] [stderr]    |
[INFO] [stderr] 96 | impl_to_biguint!(u32,  FromPrimitive::from_u32)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]   --> src/bignum/lib.rs:97:24
[INFO] [stderr]    |
[INFO] [stderr] 97 | impl_to_biguint!(u64,  FromPrimitive::from_u64)
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]    --> src/bignum/lib.rs:226:32
[INFO] [stderr]     |
[INFO] [stderr] 226 |         let mpz: Option<Mpz> = FromPrimitive::from_u64(other);
[INFO] [stderr]     |                                ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FromPrimitive`
[INFO] [stderr]    --> src/bignum/lib.rs:234:32
[INFO] [stderr]     |
[INFO] [stderr] 234 |         let mpz: Option<Mpz> = FromPrimitive::from_i64(other);
[INFO] [stderr]     |                                ^^^^^^^^^^^^^ use of undeclared type or module `FromPrimitive`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/bignum/lib.rs:27:43
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn from_str_radix(s: &str, radix: uint) -> Option<BigUint> {
[INFO] [stderr]    |                                           ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/bignum/lib.rs:35:27
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn bits(&self) -> uint {
[INFO] [stderr]    |                           ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `FromPrimitive` in this scope
[INFO] [stderr]   --> src/bignum/lib.rs:52:6
[INFO] [stderr]    |
[INFO] [stderr] 52 | impl FromPrimitive for BigUint {
[INFO] [stderr]    |      ^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 13 | use num::FromPrimitive;
[INFO] [stderr]    |
[INFO] [stderr] 13 | use num::cast::FromPrimitive;
[INFO] [stderr]    |
[INFO] [stderr] 13 | use num::traits::FromPrimitive;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `int` in this scope
[INFO] [stderr]   --> src/bignum/lib.rs:88:18
[INFO] [stderr]    |
[INFO] [stderr] 88 | impl_to_biguint!(int,  FromPrimitive::from_int)
[INFO] [stderr]    |                  ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]   --> src/bignum/lib.rs:93:18
[INFO] [stderr]    |
[INFO] [stderr] 93 | impl_to_biguint!(uint, FromPrimitive::from_uint)
[INFO] [stderr]    |                  ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:110:35
[INFO] [stderr]     |
[INFO] [stderr] 110 |     fn to_str_radix(&self, radix: uint) -> String {
[INFO] [stderr]     |                                   ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Show` in module `fmt`
[INFO] [stderr]    --> src/bignum/lib.rs:115:11
[INFO] [stderr]     |
[INFO] [stderr] 115 | impl fmt::Show for BigUint {
[INFO] [stderr]     |           ^^^^ not found in `fmt`
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Add` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:121:6
[INFO] [stderr]     |
[INFO] [stderr] 121 | impl Add<BigUint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Add;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Sub` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:127:6
[INFO] [stderr]     |
[INFO] [stderr] 127 | impl Sub<BigUint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Sub;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Mul` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:133:6
[INFO] [stderr]     |
[INFO] [stderr] 133 | impl Mul<BigUint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Mul;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Div` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:139:6
[INFO] [stderr]     |
[INFO] [stderr] 139 | impl Div<BigUint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Div;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Rem` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:145:6
[INFO] [stderr]     |
[INFO] [stderr] 145 | impl Rem<BigUint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Rem;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `BitAnd` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:151:6
[INFO] [stderr]     |
[INFO] [stderr] 151 | impl BitAnd<BigUint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::BitAnd;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Shr` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:157:6
[INFO] [stderr]     |
[INFO] [stderr] 157 | impl Shr<uint, BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Shr;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:157:10
[INFO] [stderr]     |
[INFO] [stderr] 157 | impl Shr<uint, BigUint> for BigUint {
[INFO] [stderr]     |          ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:158:25
[INFO] [stderr]     |
[INFO] [stderr] 158 |     fn shr(&self, rhs: &uint) -> BigUint {
[INFO] [stderr]     |                         ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Neg` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:164:6
[INFO] [stderr]     |
[INFO] [stderr] 164 | impl Neg<BigUint> for BigUint {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Neg;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Num` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:168:6
[INFO] [stderr]     |
[INFO] [stderr] 168 | impl Num for BigUint {}
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use num::Num;
[INFO] [stderr]     |
[INFO] [stderr] 13  | use num::traits::Num;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `FromPrimitive` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:224:6
[INFO] [stderr]     |
[INFO] [stderr] 224 | impl FromPrimitive for BigInt {
[INFO] [stderr]     |      ^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use num::FromPrimitive;
[INFO] [stderr]     |
[INFO] [stderr] 13  | use num::cast::FromPrimitive;
[INFO] [stderr]     |
[INFO] [stderr] 13  | use num::traits::FromPrimitive;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:243:35
[INFO] [stderr]     |
[INFO] [stderr] 243 |     fn to_str_radix(&self, radix: uint) -> String {
[INFO] [stderr]     |                                   ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Show` in module `fmt`
[INFO] [stderr]    --> src/bignum/lib.rs:248:11
[INFO] [stderr]     |
[INFO] [stderr] 248 | impl fmt::Show for BigInt {
[INFO] [stderr]     |           ^^^^ not found in `fmt`
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Add` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:254:6
[INFO] [stderr]     |
[INFO] [stderr] 254 | impl Add<BigInt, BigInt> for BigInt {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Add;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Sub` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:260:6
[INFO] [stderr]     |
[INFO] [stderr] 260 | impl Sub<BigInt, BigInt> for BigInt {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Sub;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Mul` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:266:6
[INFO] [stderr]     |
[INFO] [stderr] 266 | impl Mul<BigInt, BigInt> for BigInt {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Mul;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Div` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:272:6
[INFO] [stderr]     |
[INFO] [stderr] 272 | impl Div<BigInt, BigInt> for BigInt {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Div;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Rem` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:278:6
[INFO] [stderr]     |
[INFO] [stderr] 278 | impl Rem<BigInt, BigInt> for BigInt {
[INFO] [stderr]     |      ^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::ops::Rem;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:306:41
[INFO] [stderr]     |
[INFO] [stderr] 306 |     fn gen_biguint(&mut self, bit_size: uint) -> BigUint;
[INFO] [stderr]     |                                         ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `uint` in this scope
[INFO] [stderr]    --> src/bignum/lib.rs:327:41
[INFO] [stderr]     |
[INFO] [stderr] 327 |     fn gen_biguint(&mut self, bit_size: uint) -> BigUint {
[INFO] [stderr]     |                                         ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/bignum/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(macro_rules)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> src/bignum/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | extern crate libc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/bignum/lib.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | extern crate rand;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/bignum/lib.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use libc::c_ulong;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/bignum/lib.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use rand::Rng;
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> src/bignum/lib.rs:326:9
[INFO] [stderr]     |
[INFO] [stderr] 326 | impl<R: Rng> RandBigInt for R {
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> src/bignum/lib.rs:159:29
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let shift = *rhs as c_ulong;
[INFO] [stderr]     |                             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> src/bignum/lib.rs:329:19
[INFO] [stderr]     |
[INFO] [stderr] 329 |         let seed: c_ulong = self.gen();
[INFO] [stderr]     |                   ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> src/bignum/lib.rs:331:50
[INFO] [stderr]     |
[INFO] [stderr] 331 |         let mpz = state.urandom_2exp(bit_size as c_ulong);
[INFO] [stderr]     |                                                  ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> src/bignum/lib.rs:340:19
[INFO] [stderr]     |
[INFO] [stderr] 340 |         let seed: c_ulong = self.gen();
[INFO] [stderr]     |                   ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 78 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0405, E0412, E0432, E0433, E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0405`.
[INFO] [stderr] error: Could not compile `rust-bignum`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f55976d560ef9b3d7e87c7f40418f027c66f42f743225f11db9b054eef7691db"`
[INFO] running `"docker" "rm" "-f" "f55976d560ef9b3d7e87c7f40418f027c66f42f743225f11db9b054eef7691db"`
[INFO] [stdout] f55976d560ef9b3d7e87c7f40418f027c66f42f743225f11db9b054eef7691db