[INFO] fetching crate min_err_per_step 0.0.20...
[INFO] checking min_err_per_step-0.0.20 against master#ddaf12390d3ffb7d5ba74491a48f3cd528e5d777 for pr-146504
[INFO] extracting crate min_err_per_step 0.0.20 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate min_err_per_step 0.0.20
[INFO] finished tweaking crates.io crate min_err_per_step 0.0.20
[INFO] tweaked toml for crates.io crate min_err_per_step 0.0.20 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate min_err_per_step 0.0.20 on toolchain ddaf12390d3ffb7d5ba74491a48f3cd528e5d777
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddaf12390d3ffb7d5ba74491a48f3cd528e5d777" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate min_err_per_step 0.0.20 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddaf12390d3ffb7d5ba74491a48f3cd528e5d777" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unic-ucd-hangul v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-block v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-normal v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-age v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-bidi v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-common v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-case v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-ident v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-category v0.9.0
[INFO] [stderr]   Downloaded unic-ucd-name_aliases v0.9.0
[INFO] [stderr]   Downloaded unic-ucd v0.9.0
[INFO] [stderr]   Downloaded substring v1.4.5
[INFO] [stderr]   Downloaded unic-ucd-name v0.9.0
[INFO] [stderr]   Downloaded rug v1.28.0
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.6.8
[INFO] [stderr]   Downloaded Mademoiselle_Entropia v1.11.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddaf12390d3ffb7d5ba74491a48f3cd528e5d777" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 287e505014be2a781a888edaa834f710a668765d4f06e4c8b36640bc33a159fa
[INFO] running `Command { std: "docker" "start" "-a" "287e505014be2a781a888edaa834f710a668765d4f06e4c8b36640bc33a159fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "287e505014be2a781a888edaa834f710a668765d4f06e4c8b36640bc33a159fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "287e505014be2a781a888edaa834f710a668765d4f06e4c8b36640bc33a159fa", kill_on_drop: false }`
[INFO] [stdout] 287e505014be2a781a888edaa834f710a668765d4f06e4c8b36640bc33a159fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddaf12390d3ffb7d5ba74491a48f3cd528e5d777" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ba10c8cb09dea0d68d80e7417594b53a34359bf7ccd3508bfdb77533da74670
[INFO] running `Command { std: "docker" "start" "-a" "3ba10c8cb09dea0d68d80e7417594b53a34359bf7ccd3508bfdb77533da74670", kill_on_drop: false }`
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.8
[INFO] [stderr]    Compiling substring v1.4.5
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling rug v1.28.0
[INFO] [stderr]    Compiling min_err_per_step v0.0.20 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking chrono v0.4.41
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking unic-ucd-hangul v0.9.0
[INFO] [stderr]     Checking unic-ucd-category v0.9.0
[INFO] [stderr]     Checking unic-ucd-case v0.9.0
[INFO] [stderr]     Checking unic-ucd-block v0.9.0
[INFO] [stderr]     Checking unic-ucd-segment v0.9.0
[INFO] [stderr]     Checking unic-ucd-age v0.9.0
[INFO] [stderr]     Checking unic-ucd-common v0.9.0
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]     Checking unic-ucd-ident v0.9.0
[INFO] [stderr]     Checking unic-ucd-name_aliases v0.9.0
[INFO] [stderr]     Checking unic-ucd-name v0.9.0
[INFO] [stderr]     Checking unic-ucd-normal v0.9.0
[INFO] [stderr]     Checking unic-ucd v0.9.0
[INFO] [stderr]     Checking Mademoiselle_Entropia v1.11.18
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:16:27
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut y: rugfloat = (_1.clone() - dx.clone().pow(2) );
[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] 16 -     let mut y: rugfloat = (_1.clone() - dx.clone().pow(2) );
[INFO] [stdout] 16 +     let mut y: rugfloat = _1.clone() - dx.clone().pow(2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     dx = ( dx.clone().pow(2) + dy.clone().pow(2) );
[INFO] [stdout]    |          ^^                                     ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 19 -     dx = ( dx.clone().pow(2) + dy.clone().pow(2) );
[INFO] [stdout] 19 +     dx = dx.clone().pow(2) + dy.clone().pow(2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         y = (_1.clone() - dx.clone().pow (2) );
[INFO] [stdout]    |             ^                               ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 24 -         y = (_1.clone() - dx.clone().pow (2) );
[INFO] [stdout] 24 +         y = _1.clone() - dx.clone().pow (2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:27:14
[INFO] [stdout]    |
[INFO] [stdout] 27 |         dx = ( dx.clone().pow (2) + dy.clone().pow (2) );
[INFO] [stdout]    |              ^^                                       ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 -         dx = ( dx.clone().pow (2) + dy.clone().pow (2) );
[INFO] [stdout] 27 +         dx = dx.clone().pow (2) + dy.clone().pow (2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:16:27
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut y: rugfloat = (_1.clone() - dx.clone().pow(2) );
[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] 16 -     let mut y: rugfloat = (_1.clone() - dx.clone().pow(2) );
[INFO] [stdout] 16 +     let mut y: rugfloat = _1.clone() - dx.clone().pow(2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |     dx = ( dx.clone().pow(2) + dy.clone().pow(2) );
[INFO] [stdout]    |          ^^                                     ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 19 -     dx = ( dx.clone().pow(2) + dy.clone().pow(2) );
[INFO] [stdout] 19 +     dx = dx.clone().pow(2) + dy.clone().pow(2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         y = (_1.clone() - dx.clone().pow (2) );
[INFO] [stdout]    |             ^                               ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 24 -         y = (_1.clone() - dx.clone().pow (2) );
[INFO] [stdout] 24 +         y = _1.clone() - dx.clone().pow (2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/base.rs:27:14
[INFO] [stdout]    |
[INFO] [stdout] 27 |         dx = ( dx.clone().pow (2) + dy.clone().pow (2) );
[INFO] [stdout]    |              ^^                                       ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 -         dx = ( dx.clone().pow (2) + dy.clone().pow (2) );
[INFO] [stdout] 27 +         dx = dx.clone().pow (2) + dy.clone().pow (2);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 20s
[INFO] running `Command { std: "docker" "inspect" "3ba10c8cb09dea0d68d80e7417594b53a34359bf7ccd3508bfdb77533da74670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ba10c8cb09dea0d68d80e7417594b53a34359bf7ccd3508bfdb77533da74670", kill_on_drop: false }`
[INFO] [stdout] 3ba10c8cb09dea0d68d80e7417594b53a34359bf7ccd3508bfdb77533da74670