[INFO] fetching crate marksweep 0.1.0...
[INFO] testing marksweep-0.1.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate marksweep 0.1.0 into /workspace/builds/worker-66/source
[INFO] validating manifest of crates.io crate marksweep 0.1.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate marksweep 0.1.0
[INFO] finished tweaking crates.io crate marksweep 0.1.0
[INFO] tweaked toml for crates.io crate marksweep 0.1.0 written to /workspace/builds/worker-66/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ff99e84b545abb98364bfb04d549ccedb7bec3138c2d57bb88ad66c8589331e
[INFO] running `Command { std: "docker" "start" "-a" "2ff99e84b545abb98364bfb04d549ccedb7bec3138c2d57bb88ad66c8589331e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ff99e84b545abb98364bfb04d549ccedb7bec3138c2d57bb88ad66c8589331e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ff99e84b545abb98364bfb04d549ccedb7bec3138c2d57bb88ad66c8589331e", kill_on_drop: false }`
[INFO] [stdout] 2ff99e84b545abb98364bfb04d549ccedb7bec3138c2d57bb88ad66c8589331e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b188f9f7594d6e12abdd834841345a8fd7236dcf2e352f83a4674ecfe25061a
[INFO] running `Command { std: "docker" "start" "-a" "3b188f9f7594d6e12abdd834841345a8fd7236dcf2e352f83a4674ecfe25061a", kill_on_drop: false }`
[INFO] [stderr]    Compiling marksweep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn is_root_changes<T: MarkSweep>(x: &T) {
[INFO] [stdout]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn init<T: MarkSweep>(x: &T) {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `root_set` should have an upper case name
[INFO] [stdout]   --> src/lib.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 |     static ref root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stdout]    |                ^^^^^^^^ help: convert the identifier to upper case: `ROOT_SET`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `not_root_set` should have an upper case name
[INFO] [stdout]   --> src/lib.rs:66:16
[INFO] [stdout]    |
[INFO] [stdout] 66 |     static ref not_root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stdout]    |                ^^^^^^^^^^^^ help: convert the identifier to upper case: `NOT_ROOT_SET`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "3b188f9f7594d6e12abdd834841345a8fd7236dcf2e352f83a4674ecfe25061a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b188f9f7594d6e12abdd834841345a8fd7236dcf2e352f83a4674ecfe25061a", kill_on_drop: false }`
[INFO] [stdout] 3b188f9f7594d6e12abdd834841345a8fd7236dcf2e352f83a4674ecfe25061a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50529be2113d2a6bdd7e39ef59429de447514db50b8dded07d79f12761763d96
[INFO] running `Command { std: "docker" "start" "-a" "50529be2113d2a6bdd7e39ef59429de447514db50b8dded07d79f12761763d96", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling marksweep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn is_root_changes<T: MarkSweep>(x: &T) {
[INFO] [stdout]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn init<T: MarkSweep>(x: &T) {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `root_set` should have an upper case name
[INFO] [stdout]   --> src/lib.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 |     static ref root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stdout]    |                ^^^^^^^^ help: convert the identifier to upper case: `ROOT_SET`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `not_root_set` should have an upper case name
[INFO] [stdout]   --> src/lib.rs:66:16
[INFO] [stdout]    |
[INFO] [stdout] 66 |     static ref not_root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stdout]    |                ^^^^^^^^^^^^ help: convert the identifier to upper case: `NOT_ROOT_SET`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn is_root_changes<T: MarkSweep>(x: &T) {
[INFO] [stdout]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn init<T: MarkSweep>(x: &T) {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `root_set` should have an upper case name
[INFO] [stdout]   --> src/lib.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 |     static ref root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stdout]    |                ^^^^^^^^ help: convert the identifier to upper case: `ROOT_SET`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `not_root_set` should have an upper case name
[INFO] [stdout]   --> src/lib.rs:66:16
[INFO] [stdout]    |
[INFO] [stdout] 66 |     static ref not_root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stdout]    |                ^^^^^^^^^^^^ help: convert the identifier to upper case: `NOT_ROOT_SET`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.58s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/marksweep-2e528c729491b227)
[INFO] running `Command { std: "docker" "inspect" "50529be2113d2a6bdd7e39ef59429de447514db50b8dded07d79f12761763d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50529be2113d2a6bdd7e39ef59429de447514db50b8dded07d79f12761763d96", kill_on_drop: false }`
[INFO] [stdout] 50529be2113d2a6bdd7e39ef59429de447514db50b8dded07d79f12761763d96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 598dcb38b05e171ce444cf24c9b7c7226e59026e207804722071dd9bee11f548
[INFO] running `Command { std: "docker" "start" "-a" "598dcb38b05e171ce444cf24c9b7c7226e59026e207804722071dd9bee11f548", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/lib.rs:17:38
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn is_root_changes<T: MarkSweep>(x: &T) {
[INFO] [stderr]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/lib.rs:21:27
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn init<T: MarkSweep>(x: &T) {
[INFO] [stderr]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `root_set` should have an upper case name
[INFO] [stderr]   --> src/lib.rs:65:16
[INFO] [stderr]    |
[INFO] [stderr] 65 |     static ref root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stderr]    |                ^^^^^^^^ help: convert the identifier to upper case: `ROOT_SET`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `not_root_set` should have an upper case name
[INFO] [stderr]   --> src/lib.rs:66:16
[INFO] [stderr]    |
[INFO] [stderr] 66 |     static ref not_root_set: Mutex<HashSet<Element>> = Mutex::new(HashSet::new());
[INFO] [stderr]    |                ^^^^^^^^^^^^ help: convert the identifier to upper case: `NOT_ROOT_SET`
[INFO] [stderr] 
[INFO] [stderr] warning: `marksweep` (lib) generated 4 warnings
[INFO] [stderr] warning: `marksweep` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/marksweep-2e528c729491b227)
[INFO] [stderr]    Doc-tests marksweep
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "598dcb38b05e171ce444cf24c9b7c7226e59026e207804722071dd9bee11f548", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "598dcb38b05e171ce444cf24c9b7c7226e59026e207804722071dd9bee11f548", kill_on_drop: false }`
[INFO] [stdout] 598dcb38b05e171ce444cf24c9b7c7226e59026e207804722071dd9bee11f548