[INFO] fetching crate tnetstring 0.2.0...
[INFO] checking tnetstring-0.2.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate tnetstring 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate tnetstring 0.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tnetstring 0.2.0
[INFO] finished tweaking crates.io crate tnetstring 0.2.0
[INFO] tweaked toml for crates.io crate tnetstring 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 022a023bba5dc89a308c22d9456841b4e14e9fb63985d544f890143bf1fa04c7
[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" "022a023bba5dc89a308c22d9456841b4e14e9fb63985d544f890143bf1fa04c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "022a023bba5dc89a308c22d9456841b4e14e9fb63985d544f890143bf1fa04c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022a023bba5dc89a308c22d9456841b4e14e9fb63985d544f890143bf1fa04c7", kill_on_drop: false }`
[INFO] [stdout] 022a023bba5dc89a308c22d9456841b4e14e9fb63985d544f890143bf1fa04c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 233f50224e6eb7c78d6c5569faeb25f30054657c5e3fa3364a8565785b310e7c
[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" "233f50224e6eb7c78d6c5569faeb25f30054657c5e3fa3364a8565785b310e7c", kill_on_drop: false }`
[INFO] [stderr]     Checking tnetstring v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:50:48
[INFO] [stdout]    |
[INFO] [stdout] 50 |         formatter.write_str(std::error::Error::description(self))
[INFO] [stdout]    |                                                ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/ser.rs:49:18
[INFO] [stdout]     |
[INFO] [stdout] 49  |         .map(|x| String::from(x.as_ref()))
[INFO] [stdout]     |                  ^^^^^^^^^^^^ cannot infer type for reference `&_`
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `std::string::String: From<&_>`
[INFO] [stdout] note: required by `std::convert::From::from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tnetstring` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:50:48
[INFO] [stdout]    |
[INFO] [stdout] 50 |         formatter.write_str(std::error::Error::description(self))
[INFO] [stdout]    |                                                ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/ser.rs:49:18
[INFO] [stdout]     |
[INFO] [stdout] 49  |         .map(|x| String::from(x.as_ref()))
[INFO] [stdout]     |                  ^^^^^^^^^^^^ cannot infer type for reference `&_`
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `std::string::String: From<&_>`
[INFO] [stdout] note: required by `std::convert::From::from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "233f50224e6eb7c78d6c5569faeb25f30054657c5e3fa3364a8565785b310e7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "233f50224e6eb7c78d6c5569faeb25f30054657c5e3fa3364a8565785b310e7c", kill_on_drop: false }`
[INFO] [stdout] 233f50224e6eb7c78d6c5569faeb25f30054657c5e3fa3364a8565785b310e7c
