[INFO] fetching crate sp4r53 0.1.4...
[INFO] testing sp4r53-0.1.4 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] extracting crate sp4r53 0.1.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate sp4r53 0.1.4 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sp4r53 0.1.4
[INFO] finished tweaking crates.io crate sp4r53 0.1.4
[INFO] tweaked toml for crates.io crate sp4r53 0.1.4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e657d4cd8d4d9569fa43adbda65ce0bc638eee2a289270588419b4247b2333a9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e657d4cd8d4d9569fa43adbda65ce0bc638eee2a289270588419b4247b2333a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e657d4cd8d4d9569fa43adbda65ce0bc638eee2a289270588419b4247b2333a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e657d4cd8d4d9569fa43adbda65ce0bc638eee2a289270588419b4247b2333a9", kill_on_drop: false }`
[INFO] [stdout] e657d4cd8d4d9569fa43adbda65ce0bc638eee2a289270588419b4247b2333a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b2223e90acd780d2b32d6c7a67908993b9f97bb12a2533d2215612d946dde2b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1b2223e90acd780d2b32d6c7a67908993b9f97bb12a2533d2215612d946dde2b", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling subtle v2.4.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling ethnum v1.0.3
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling blake3 v0.3.8
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling thiserror v1.0.25
[INFO] [stderr]    Compiling sp4r53 v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.12s
[INFO] running `Command { std: "docker" "inspect" "1b2223e90acd780d2b32d6c7a67908993b9f97bb12a2533d2215612d946dde2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b2223e90acd780d2b32d6c7a67908993b9f97bb12a2533d2215612d946dde2b", kill_on_drop: false }`
[INFO] [stdout] 1b2223e90acd780d2b32d6c7a67908993b9f97bb12a2533d2215612d946dde2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a60be0c79e1ce1ca653239f0b0915d61c2f873836b198e7768885b669d72973
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4a60be0c79e1ce1ca653239f0b0915d61c2f873836b198e7768885b669d72973", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v0.10.1
[INFO] [stderr]    Compiling sp4r53 v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/works.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut hashes = [
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 22.53s
[INFO] running `Command { std: "docker" "inspect" "4a60be0c79e1ce1ca653239f0b0915d61c2f873836b198e7768885b669d72973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a60be0c79e1ce1ca653239f0b0915d61c2f873836b198e7768885b669d72973", kill_on_drop: false }`
[INFO] [stdout] 4a60be0c79e1ce1ca653239f0b0915d61c2f873836b198e7768885b669d72973
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2e387643fd781df383d2c58e36ca072ff8bad5fce0776bc0d7ed9e69cd6fe190
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2e387643fd781df383d2c58e36ca072ff8bad5fce0776bc0d7ed9e69cd6fe190", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> tests/works.rs:18:9
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 18 |     let mut hashes = [
[INFO] [stdout] 
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sp4r53-15f80fd84f253884)
[INFO] [stderr]      Running tests/props.rs (/opt/rustwide/target/debug/deps/props-7283b7222c3be98f)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test prop_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/works.rs (/opt/rustwide/target/debug/deps/works-c969b645c5a3cde0)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sp4r53
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test src/lib.rs - (line 19) ... ok
[INFO] [stdout] test src/lib.rs - Proof::as_bytes (line 642) ... ok
[INFO] [stdout] test src/lib.rs - Tree::flush (line 436) ... ok
[INFO] [stdout] test src/lib.rs - Proof::from_bytes (line 538) ... ok
[INFO] [stdout] test src/lib.rs - Proof::size (line 577) ... ok
[INFO] [stdout] test src/lib.rs - Proof::verify (line 721) ... ok
[INFO] [stdout] test src/lib.rs - Tree::leaves (line 237) ... ok
[INFO] [stdout] test src/lib.rs - Tree::proove (line 315) ... ok
[INFO] [stdout] test src/lib.rs - Tree::insert (line 353) ... ok
[INFO] [stdout] test src/lib.rs - Tree::is_valid (line 269) ... ok
[INFO] [stdout] test src/lib.rs - Tree::root (line 200) ... ok
[INFO] [stdout] test src/lib.rs - Tree::remove (line 394) ... ok
[INFO] [stdout] test src/lib.rs - Proof::new (line 487) ... ok
[INFO] [stdout] test src/lib.rs - Proof::hashes (line 675) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.66s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2e387643fd781df383d2c58e36ca072ff8bad5fce0776bc0d7ed9e69cd6fe190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e387643fd781df383d2c58e36ca072ff8bad5fce0776bc0d7ed9e69cd6fe190", kill_on_drop: false }`
[INFO] [stdout] 2e387643fd781df383d2c58e36ca072ff8bad5fce0776bc0d7ed9e69cd6fe190