[INFO] fetching crate rust-bigint 1.2.0...
[INFO] checking rust-bigint-1.2.0 against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] extracting crate rust-bigint 1.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate rust-bigint 1.2.0
[INFO] finished tweaking crates.io crate rust-bigint 1.2.0
[INFO] tweaked toml for crates.io crate rust-bigint 1.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust-bigint 1.2.0 on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding getrandom v0.2.16 (available: v0.3.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7242742181fd44dceacbb84561a4da20c394211ed608dd48e913798fbb88dfb9
[INFO] running `Command { std: "docker" "start" "-a" "7242742181fd44dceacbb84561a4da20c394211ed608dd48e913798fbb88dfb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7242742181fd44dceacbb84561a4da20c394211ed608dd48e913798fbb88dfb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7242742181fd44dceacbb84561a4da20c394211ed608dd48e913798fbb88dfb9", kill_on_drop: false }`
[INFO] [stdout] 7242742181fd44dceacbb84561a4da20c394211ed608dd48e913798fbb88dfb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a441ef8f4f8fd24852e927a13dd3fbbcc6ed44ca36c049162d55d1ba7411c19
[INFO] running `Command { std: "docker" "start" "-a" "4a441ef8f4f8fd24852e927a13dd3fbbcc6ed44ca36c049162d55d1ba7411c19", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-gmp-kzen v0.5.1
[INFO] [stderr]     Checking rust-bigint v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/big_gmp.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         drop(self);
[INFO] [stdout]    |         ^^^^^----^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Mpz`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 21 -         drop(self);
[INFO] [stdout] 21 +         let _ = self;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/big_gmp.rs:29:35
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let bytes: Vec<u8> = value.borrow().into();
[INFO] [stdout]    |                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Mpz` does not implement `Borrow`, so calling `borrow` on `&Mpz` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 29 -         let bytes: Vec<u8> = value.borrow().into();
[INFO] [stdout] 29 +         let bytes: Vec<u8> = value.into();
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Mpz`, implement `Clone` for it
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rust-gmp-kzen-0.5.1/src/mpz.rs:110:1
[INFO] [stdout]    |
[INFO] [stdout] 110+ #[derive(Clone)]
[INFO] [stdout] 111| pub struct Mpz {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/big_gmp.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         drop(self);
[INFO] [stdout]    |         ^^^^^----^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Mpz`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 21 -         drop(self);
[INFO] [stdout] 21 +         let _ = self;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/big_gmp.rs:29:35
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let bytes: Vec<u8> = value.borrow().into();
[INFO] [stdout]    |                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Mpz` does not implement `Borrow`, so calling `borrow` on `&Mpz` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 29 -         let bytes: Vec<u8> = value.borrow().into();
[INFO] [stdout] 29 +         let bytes: Vec<u8> = value.into();
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `Mpz`, implement `Clone` for it
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rust-gmp-kzen-0.5.1/src/mpz.rs:110:1
[INFO] [stdout]    |
[INFO] [stdout] 110+ #[derive(Clone)]
[INFO] [stdout] 111| pub struct Mpz {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "4a441ef8f4f8fd24852e927a13dd3fbbcc6ed44ca36c049162d55d1ba7411c19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a441ef8f4f8fd24852e927a13dd3fbbcc6ed44ca36c049162d55d1ba7411c19", kill_on_drop: false }`
[INFO] [stdout] 4a441ef8f4f8fd24852e927a13dd3fbbcc6ed44ca36c049162d55d1ba7411c19
