[INFO] fetching crate two-sided-vec 0.1.10...
[INFO] checking two-sided-vec-0.1.10 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate two-sided-vec 0.1.10 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate two-sided-vec 0.1.10 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate two-sided-vec 0.1.10
[INFO] finished tweaking crates.io crate two-sided-vec 0.1.10
[INFO] tweaked toml for crates.io crate two-sided-vec 0.1.10 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28897c12473c6e05975e6c2c0fc94a549e693bb7788f5f76678b27443f92f881
[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" "28897c12473c6e05975e6c2c0fc94a549e693bb7788f5f76678b27443f92f881", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28897c12473c6e05975e6c2c0fc94a549e693bb7788f5f76678b27443f92f881", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28897c12473c6e05975e6c2c0fc94a549e693bb7788f5f76678b27443f92f881", kill_on_drop: false }`
[INFO] [stdout] 28897c12473c6e05975e6c2c0fc94a549e693bb7788f5f76678b27443f92f881
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3c714e889b2c066e82ac324c3cb07aae5a3209f9219cf1971980639b1b3545e
[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" "e3c714e889b2c066e82ac324c3cb07aae5a3209f9219cf1971980639b1b3545e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking two-sided-vec v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/raw.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut heap = Global::default();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/raw.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let mut heap = Global::default();
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_test v1.0.118
[INFO] [stdout] error[E0277]: the trait bound `TwoSidedVec<{integer}>: serde::ser::Serialize` is not satisfied
[INFO] [stdout]   --> tests/basic.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     ::serde_test::assert_tokens(&values, &[
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `TwoSidedVec<{integer}>`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_test-1.0.118/src/assert.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     T: Serialize + Deserialize<'de> + PartialEq + Debug,
[INFO] [stdout]    |        --------- required by this bound in `assert_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `TwoSidedVec<{integer}>: serde::de::Deserialize<'_>` is not satisfied
[INFO] [stdout]   --> tests/basic.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     ::serde_test::assert_tokens(&values, &[
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `serde::de::Deserialize<'_>` is not implemented for `TwoSidedVec<{integer}>`
[INFO] [stdout]    | 
[INFO] [stdout]   ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_test-1.0.118/src/assert.rs:33:20
[INFO] [stdout]    |
[INFO] [stdout] 33 |     T: Serialize + Deserialize<'de> + PartialEq + Debug,
[INFO] [stdout]    |                    ---------------- required by this bound in `assert_tokens`
[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 E0277`.
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/raw.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut heap = Global::default();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/raw.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let mut heap = Global::default();
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `two-sided-vec`
[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] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e3c714e889b2c066e82ac324c3cb07aae5a3209f9219cf1971980639b1b3545e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3c714e889b2c066e82ac324c3cb07aae5a3209f9219cf1971980639b1b3545e", kill_on_drop: false }`
[INFO] [stdout] e3c714e889b2c066e82ac324c3cb07aae5a3209f9219cf1971980639b1b3545e