[INFO] fetching crate c_linked_list 1.1.1...
[INFO] testing c_linked_list-1.1.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate c_linked_list 1.1.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate c_linked_list 1.1.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate c_linked_list 1.1.1
[INFO] finished tweaking crates.io crate c_linked_list 1.1.1
[INFO] tweaked toml for crates.io crate c_linked_list 1.1.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 366418b5a892e6a1f6cf578a6097e5f0dd31d7ef3cb66946909ef44043c3b02c
[INFO] running `Command { std: "docker" "start" "-a" "366418b5a892e6a1f6cf578a6097e5f0dd31d7ef3cb66946909ef44043c3b02c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "366418b5a892e6a1f6cf578a6097e5f0dd31d7ef3cb66946909ef44043c3b02c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "366418b5a892e6a1f6cf578a6097e5f0dd31d7ef3cb66946909ef44043c3b02c", kill_on_drop: false }`
[INFO] [stdout] 366418b5a892e6a1f6cf578a6097e5f0dd31d7ef3cb66946909ef44043c3b02c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85d5e14862c7eb88b13b46012cec2375338b23941955eca093f78eeb410864a3
[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" "85d5e14862c7eb88b13b46012cec2375338b23941955eca093f78eeb410864a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling c_linked_list v1.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:138:18
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn into_iter(mut self) -> CLinkedListMutIterMut<'a, T, N> {
[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 dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "85d5e14862c7eb88b13b46012cec2375338b23941955eca093f78eeb410864a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85d5e14862c7eb88b13b46012cec2375338b23941955eca093f78eeb410864a3", kill_on_drop: false }`
[INFO] [stdout] 85d5e14862c7eb88b13b46012cec2375338b23941955eca093f78eeb410864a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8de510325c669abc9ae0479a22d2f0aca900bc1b1989dd84bf9a88b34d534d2f
[INFO] running `Command { std: "docker" "start" "-a" "8de510325c669abc9ae0479a22d2f0aca900bc1b1989dd84bf9a88b34d534d2f", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:138:18
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn into_iter(mut self) -> CLinkedListMutIterMut<'a, T, N> {
[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] [stderr]    Compiling c_linked_list v1.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:138:18
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn into_iter(mut self) -> CLinkedListMutIterMut<'a, T, N> {
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8de510325c669abc9ae0479a22d2f0aca900bc1b1989dd84bf9a88b34d534d2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8de510325c669abc9ae0479a22d2f0aca900bc1b1989dd84bf9a88b34d534d2f", kill_on_drop: false }`
[INFO] [stdout] 8de510325c669abc9ae0479a22d2f0aca900bc1b1989dd84bf9a88b34d534d2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 40f8bb4ddb37b3bd3305b7c67098171f92e994d8b2cd98391c80cc3287ea57d2
[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" "40f8bb4ddb37b3bd3305b7c67098171f92e994d8b2cd98391c80cc3287ea57d2", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stdout] 
[INFO] [stderr]    --> src/lib.rs:138:18
[INFO] [stdout] running 2 tests
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn into_iter(mut self) -> CLinkedListMutIterMut<'a, T, N> {
[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: `c_linked_list` (lib) generated 1 warning
[INFO] [stderr] warning: `c_linked_list` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/c_linked_list-0e8a9f355d67cb17)
[INFO] [stdout] test tests::test_const ... ok
[INFO] [stdout] test tests::test_mut ... ok
[INFO] [stderr]    Doc-tests c_linked_list
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 15) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40f8bb4ddb37b3bd3305b7c67098171f92e994d8b2cd98391c80cc3287ea57d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40f8bb4ddb37b3bd3305b7c67098171f92e994d8b2cd98391c80cc3287ea57d2", kill_on_drop: false }`
[INFO] [stdout] 40f8bb4ddb37b3bd3305b7c67098171f92e994d8b2cd98391c80cc3287ea57d2