[INFO] fetching crate rcmath 0.0.1...
[INFO] testing rcmath-0.0.1 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate rcmath 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate rcmath 0.0.1
[INFO] finished tweaking crates.io crate rcmath 0.0.1
[INFO] tweaked toml for crates.io crate rcmath 0.0.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rcmath 0.0.1 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding num-bigint v0.2.6 (available: v0.4.6)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55a22d2ebd6cc2085932a4a20ad5514efc568e610392b38ff87e5c1d7db6ec4f
[INFO] running `Command { std: "docker" "start" "-a" "55a22d2ebd6cc2085932a4a20ad5514efc568e610392b38ff87e5c1d7db6ec4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55a22d2ebd6cc2085932a4a20ad5514efc568e610392b38ff87e5c1d7db6ec4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55a22d2ebd6cc2085932a4a20ad5514efc568e610392b38ff87e5c1d7db6ec4f", kill_on_drop: false }`
[INFO] [stdout] 55a22d2ebd6cc2085932a4a20ad5514efc568e610392b38ff87e5c1d7db6ec4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2745b8dbe378c28c2863c8ca46b1bef48e091034df90a81c0e2b6e62877c5c38
[INFO] running `Command { std: "docker" "start" "-a" "2745b8dbe378c28c2863c8ca46b1bef48e091034df90a81c0e2b6e62877c5c38", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling rcmath v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0407]: method `add_usize` is not a member of trait `Step`
[INFO] [stdout]    --> src/big_num.rs:413:5
[INFO] [stdout]     |
[INFO] [stdout] 413 | /     fn add_usize(&self, n: usize) -> Option<BigNum> {
[INFO] [stdout] 414 | |         Some(self.add_usize(n))
[INFO] [stdout] 415 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Step`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `replace_one` is not a member of trait `Step`
[INFO] [stdout]    --> src/big_num.rs:417:5
[INFO] [stdout]     |
[INFO] [stdout] 417 | /     fn replace_one(&mut self) -> BigNum {
[INFO] [stdout] 418 | |         self.clone()
[INFO] [stdout] 419 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Step`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `replace_zero` is not a member of trait `Step`
[INFO] [stdout]    --> src/big_num.rs:421:5
[INFO] [stdout]     |
[INFO] [stdout] 421 | /     fn replace_zero(&mut self) -> BigNum {
[INFO] [stdout] 422 | |         self.clone()
[INFO] [stdout] 423 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Step`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `add_one` is not a member of trait `Step`
[INFO] [stdout]    --> src/big_num.rs:425:5
[INFO] [stdout]     |
[INFO] [stdout] 425 | /     fn add_one(&self) -> BigNum {
[INFO] [stdout] 426 | |         self.clone() + BigNum::new_one()
[INFO] [stdout] 427 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Step`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `sub_one` is not a member of trait `Step`
[INFO] [stdout]    --> src/big_num.rs:429:5
[INFO] [stdout]     |
[INFO] [stdout] 429 | /     fn sub_one(&self) -> BigNum {
[INFO] [stdout] 430 | |         self.clone() - BigNum::new_one()
[INFO] [stdout] 431 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Step`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/big_num.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         (BigNum::new_empty()..self.clone())
[INFO] [stdout]    |         ^                                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 58 -         (BigNum::new_empty()..self.clone())
[INFO] [stdout] 58 +         BigNum::new_empty()..self.clone() 
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Add`
[INFO] [stdout]  --> src/math.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::{Add, Div, Mul, Rem};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> src/big_num.rs:409:55
[INFO] [stdout]     |
[INFO] [stdout] 409 |     fn steps_between(start: &BigNum, end: &BigNum) -> Option<usize> {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&BigNum, &BigNum) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&BigNum, &BigNum) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 409 -     fn steps_between(start: &BigNum, end: &BigNum) -> Option<usize> {
[INFO] [stdout] 409 +     fn steps_between(start: &BigNum, end: &BigNum) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `forward_checked`, `backward_checked`
[INFO] [stdout]    --> src/big_num.rs:408:1
[INFO] [stdout]     |
[INFO] [stdout] 408 | impl Step for BigNum {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^ missing `forward_checked`, `backward_checked` in implementation
[INFO] [stdout]     |
[INFO] [stdout]     = help: implement the missing item: `fn forward_checked(_: Self, _: usize) -> Option<Self> { todo!() }`
[INFO] [stdout]     = help: implement the missing item: `fn backward_checked(_: Self, _: usize) -> Option<Self> { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0053, E0407.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rcmath` (lib) due to 7 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2745b8dbe378c28c2863c8ca46b1bef48e091034df90a81c0e2b6e62877c5c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2745b8dbe378c28c2863c8ca46b1bef48e091034df90a81c0e2b6e62877c5c38", kill_on_drop: false }`
[INFO] [stdout] 2745b8dbe378c28c2863c8ca46b1bef48e091034df90a81c0e2b6e62877c5c38
