[INFO] fetching crate cowrc 0.0.4...
[INFO] checking cowrc-0.0.4 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate cowrc 0.0.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate cowrc 0.0.4 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", 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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 423ffcfb27c16f40c8ce1981fb6d8a3f1d86eaeee3bc119d1eb4ea53b092d26d
[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" "423ffcfb27c16f40c8ce1981fb6d8a3f1d86eaeee3bc119d1eb4ea53b092d26d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "423ffcfb27c16f40c8ce1981fb6d8a3f1d86eaeee3bc119d1eb4ea53b092d26d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "423ffcfb27c16f40c8ce1981fb6d8a3f1d86eaeee3bc119d1eb4ea53b092d26d", kill_on_drop: false }`
[INFO] [stdout] 423ffcfb27c16f40c8ce1981fb6d8a3f1d86eaeee3bc119d1eb4ea53b092d26d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e860bc463bb4cd8de4dc67f0b1b7bba35230fe7b1dd74ee5e1877de37de01b1
[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" "0e860bc463bb4cd8de4dc67f0b1b7bba35230fe7b1dd74ee5e1877de37de01b1", 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 `std::rc::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 `std::rc::Rc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `std::rc::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 `std::rc::Rc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `std::sync::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 `std::sync::Arc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cowrc`.
[INFO] [stdout] error[E0599]: no method named `make_unique` found for struct `std::sync::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 `std::sync::Arc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[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" "0e860bc463bb4cd8de4dc67f0b1b7bba35230fe7b1dd74ee5e1877de37de01b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e860bc463bb4cd8de4dc67f0b1b7bba35230fe7b1dd74ee5e1877de37de01b1", kill_on_drop: false }`
[INFO] [stdout] 0e860bc463bb4cd8de4dc67f0b1b7bba35230fe7b1dd74ee5e1877de37de01b1