[INFO] fetching crate cowrc 0.0.4...
[INFO] checking cowrc-0.0.4 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] extracting crate cowrc 0.0.4 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate cowrc 0.0.4 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cowrc 0.0.4
[INFO] finished tweaking crates.io crate cowrc 0.0.4
[INFO] tweaked toml for crates.io crate cowrc 0.0.4 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 670bb4067a0a981eef24e4ebf5671bd294af924bdf26f549664362685569c690
[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" "670bb4067a0a981eef24e4ebf5671bd294af924bdf26f549664362685569c690", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "670bb4067a0a981eef24e4ebf5671bd294af924bdf26f549664362685569c690", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "670bb4067a0a981eef24e4ebf5671bd294af924bdf26f549664362685569c690", kill_on_drop: false }`
[INFO] [stdout] 670bb4067a0a981eef24e4ebf5671bd294af924bdf26f549664362685569c690
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0389f47ad18d8971488631955a8d839a2cc7ff1ac563b0f9a69e4c985f74e0f
[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" "e0389f47ad18d8971488631955a8d839a2cc7ff1ac563b0f9a69e4c985f74e0f", kill_on_drop: false }`
[INFO] [stderr]     Checking cowrc v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `Rc<T>` in the current scope
[INFO] [stdout]   --> src/lib.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |         self.v.make_unique()
[INFO] [stdout]    |                ^^^^^^^^^^^ method not found in `Rc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `Arc<T>` in the current scope
[INFO] [stdout]   --> src/lib.rs:55:16
[INFO] [stdout]    |
[INFO] [stdout] 55 |         self.v.make_unique()
[INFO] [stdout]    |                ^^^^^^^^^^^ method not found in `Arc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `Rc<T>` in the current scope
[INFO] [stdout]   --> src/lib.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |         self.v.make_unique()
[INFO] [stdout]    |                ^^^^^^^^^^^ method not found in `Rc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `Arc<T>` in the current scope
[INFO] [stdout]   --> src/lib.rs:55:16
[INFO] [stdout]    |
[INFO] [stdout] 55 |         self.v.make_unique()
[INFO] [stdout]    |                ^^^^^^^^^^^ method not found in `Arc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cowrc`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e0389f47ad18d8971488631955a8d839a2cc7ff1ac563b0f9a69e4c985f74e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0389f47ad18d8971488631955a8d839a2cc7ff1ac563b0f9a69e4c985f74e0f", kill_on_drop: false }`
[INFO] [stdout] e0389f47ad18d8971488631955a8d839a2cc7ff1ac563b0f9a69e4c985f74e0f