[INFO] fetching crate marksweep 0.1.0...
[INFO] testing marksweep-0.1.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate marksweep 0.1.0 into /workspace/builds/worker-3-tc1/source
[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-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate marksweep 0.1.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0fd03d0ea1e9c4e9ab5984fd08a50310b75423595338599e02d0ebec433234a
[INFO] running `Command { std: "docker" "start" "-a" "e0fd03d0ea1e9c4e9ab5984fd08a50310b75423595338599e02d0ebec433234a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0fd03d0ea1e9c4e9ab5984fd08a50310b75423595338599e02d0ebec433234a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0fd03d0ea1e9c4e9ab5984fd08a50310b75423595338599e02d0ebec433234a", kill_on_drop: false }`
[INFO] [stdout] e0fd03d0ea1e9c4e9ab5984fd08a50310b75423595338599e02d0ebec433234a
[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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10a7af25b85387521a80a005715f09bb32161ff2e7244fcb4aed3178d298aa58
[INFO] running `Command { std: "docker" "start" "-a" "10a7af25b85387521a80a005715f09bb32161ff2e7244fcb4aed3178d298aa58", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazy_static v1.5.0
[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)]` (part of `#[warn(unused)]`) 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: struct `Element` is never constructed
[INFO] [stdout]   --> src/lib.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Element {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "10a7af25b85387521a80a005715f09bb32161ff2e7244fcb4aed3178d298aa58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10a7af25b85387521a80a005715f09bb32161ff2e7244fcb4aed3178d298aa58", kill_on_drop: false }`
[INFO] [stdout] 10a7af25b85387521a80a005715f09bb32161ff2e7244fcb4aed3178d298aa58
[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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a08ecd8f1c7ab7fa75e5b3f29d25a8761c6e65201e4db14ede12da0991dca991
[INFO] running `Command { std: "docker" "start" "-a" "a08ecd8f1c7ab7fa75e5b3f29d25a8761c6e65201e4db14ede12da0991dca991", kill_on_drop: false }`
[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)]` (part of `#[warn(unused)]`) 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: struct `Element` is never constructed
[INFO] [stdout]   --> src/lib.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Element {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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)]` (part of `#[warn(unused)]`) 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: struct `Element` is never constructed
[INFO] [stdout]   --> src/lib.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Element {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "a08ecd8f1c7ab7fa75e5b3f29d25a8761c6e65201e4db14ede12da0991dca991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08ecd8f1c7ab7fa75e5b3f29d25a8761c6e65201e4db14ede12da0991dca991", kill_on_drop: false }`
[INFO] [stdout] a08ecd8f1c7ab7fa75e5b3f29d25a8761c6e65201e4db14ede12da0991dca991
[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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 00eeb6f7e7c2628b87bd19e801e4541f32c12bcdf067ef62c87e07bb98188496
[INFO] running `Command { std: "docker" "start" "-a" "00eeb6f7e7c2628b87bd19e801e4541f32c12bcdf067ef62c87e07bb98188496", kill_on_drop: false }`
[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)]` (part of `#[warn(unused)]`) 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: struct `Element` is never constructed
[INFO] [stderr]   --> src/lib.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Element {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `marksweep` (lib) generated 3 warnings (run `cargo fix --lib -p marksweep` to apply 2 suggestions)
[INFO] [stderr] warning: `marksweep` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/marksweep-383742ed2f98154b)
[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] [stderr]    Doc-tests marksweep
[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" "00eeb6f7e7c2628b87bd19e801e4541f32c12bcdf067ef62c87e07bb98188496", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00eeb6f7e7c2628b87bd19e801e4541f32c12bcdf067ef62c87e07bb98188496", kill_on_drop: false }`
[INFO] [stdout] 00eeb6f7e7c2628b87bd19e801e4541f32c12bcdf067ef62c87e07bb98188496