[INFO] fetching crate marksweep 0.1.0...
[INFO] testing marksweep-0.1.0 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate marksweep 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate marksweep 0.1.0 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f55d0a5a71b30c8519033c062036ba370a702c8838ec87fa537cd4c0fccc5ff3
[INFO] running `Command { std: "docker" "start" "-a" "f55d0a5a71b30c8519033c062036ba370a702c8838ec87fa537cd4c0fccc5ff3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f55d0a5a71b30c8519033c062036ba370a702c8838ec87fa537cd4c0fccc5ff3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f55d0a5a71b30c8519033c062036ba370a702c8838ec87fa537cd4c0fccc5ff3", kill_on_drop: false }`
[INFO] [stdout] f55d0a5a71b30c8519033c062036ba370a702c8838ec87fa537cd4c0fccc5ff3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a12548ae4ec90bf87069141f7faafc3f3c2155e3227d054708898ccc24ff23b3
[INFO] running `Command { std: "docker" "start" "-a" "a12548ae4ec90bf87069141f7faafc3f3c2155e3227d054708898ccc24ff23b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazy_static v1.4.0
[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 0.27s
[INFO] running `Command { std: "docker" "inspect" "a12548ae4ec90bf87069141f7faafc3f3c2155e3227d054708898ccc24ff23b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a12548ae4ec90bf87069141f7faafc3f3c2155e3227d054708898ccc24ff23b3", kill_on_drop: false }`
[INFO] [stdout] a12548ae4ec90bf87069141f7faafc3f3c2155e3227d054708898ccc24ff23b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7ffb162e9d4adfda92e8f74fef8178565c0a5b8d6d846e4aaad3540c34d5392
[INFO] running `Command { std: "docker" "start" "-a" "f7ffb162e9d4adfda92e8f74fef8178565c0a5b8d6d846e4aaad3540c34d5392", 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] [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 0.51s
[INFO] running `Command { std: "docker" "inspect" "f7ffb162e9d4adfda92e8f74fef8178565c0a5b8d6d846e4aaad3540c34d5392", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7ffb162e9d4adfda92e8f74fef8178565c0a5b8d6d846e4aaad3540c34d5392", kill_on_drop: false }`
[INFO] [stdout] f7ffb162e9d4adfda92e8f74fef8178565c0a5b8d6d846e4aaad3540c34d5392
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0df606333a28f7c0d7f47cc9529b0167322ba307dd0a2bee11a7fdebba9855d5
[INFO] running `Command { std: "docker" "start" "-a" "0df606333a28f7c0d7f47cc9529b0167322ba307dd0a2bee11a7fdebba9855d5", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/lib.rs:17:38
[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] 17 | pub fn is_root_changes<T: MarkSweep>(x: &T) {
[INFO] [stdout] 
[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: 4 warnings emitted
[INFO] [stderr] 
[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: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/marksweep-9c84c9d7d9138391)
[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] running `Command { std: "docker" "inspect" "0df606333a28f7c0d7f47cc9529b0167322ba307dd0a2bee11a7fdebba9855d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0df606333a28f7c0d7f47cc9529b0167322ba307dd0a2bee11a7fdebba9855d5", kill_on_drop: false }`
[INFO] [stdout] 0df606333a28f7c0d7f47cc9529b0167322ba307dd0a2bee11a7fdebba9855d5