[INFO] fetching crate serde-object 0.0.0-alpha.0...
[INFO] testing serde-object-0.0.0-alpha.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate serde-object 0.0.0-alpha.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate serde-object 0.0.0-alpha.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-object 0.0.0-alpha.0
[INFO] finished tweaking crates.io crate serde-object 0.0.0-alpha.0
[INFO] tweaked toml for crates.io crate serde-object 0.0.0-alpha.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd884d584a3806e2d4870ca71ea8c7cebcb136151c2b05d720737f3dc01fefb7
[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" "dd884d584a3806e2d4870ca71ea8c7cebcb136151c2b05d720737f3dc01fefb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd884d584a3806e2d4870ca71ea8c7cebcb136151c2b05d720737f3dc01fefb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd884d584a3806e2d4870ca71ea8c7cebcb136151c2b05d720737f3dc01fefb7", kill_on_drop: false }`
[INFO] [stdout] dd884d584a3806e2d4870ca71ea8c7cebcb136151c2b05d720737f3dc01fefb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c1a2168eefb32b2f53ab0b00f3b75c28d478f873d1cce69c5d15ccac2a21c9e
[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" "8c1a2168eefb32b2f53ab0b00f3b75c28d478f873d1cce69c5d15ccac2a21c9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling try_match_inner v0.2.0
[INFO] [stderr]    Compiling try_match v0.2.2
[INFO] [stderr]    Compiling serde-object v0.0.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]     --> src/lib.rs:1006:31
[INFO] [stdout]      |
[INFO] [stdout] 1006 |     fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]      |                               ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fields`
[INFO] [stdout]     --> src/lib.rs:1018:9
[INFO] [stdout]      |
[INFO] [stdout] 1018 |         fields: &'static [&'static str],
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.30s
[INFO] running `Command { std: "docker" "inspect" "8c1a2168eefb32b2f53ab0b00f3b75c28d478f873d1cce69c5d15ccac2a21c9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c1a2168eefb32b2f53ab0b00f3b75c28d478f873d1cce69c5d15ccac2a21c9e", kill_on_drop: false }`
[INFO] [stdout] 8c1a2168eefb32b2f53ab0b00f3b75c28d478f873d1cce69c5d15ccac2a21c9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] 53485c6c8824f5a77aeec7cfd027617627f5947b5dc939f87839a24f05c804c4
[INFO] running `Command { std: "docker" "start" "-a" "53485c6c8824f5a77aeec7cfd027617627f5947b5dc939f87839a24f05c804c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde-object v0.0.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]     --> src/lib.rs:1006:31
[INFO] [stdout]      |
[INFO] [stdout] 1006 |     fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]      |                               ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fields`
[INFO] [stdout]     --> src/lib.rs:1018:9
[INFO] [stdout]      |
[INFO] [stdout] 1018 |         fields: &'static [&'static str],
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]     --> src/lib.rs:1006:31
[INFO] [stdout]      |
[INFO] [stdout] 1006 |     fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]      |                               ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fields`
[INFO] [stdout]     --> src/lib.rs:1018:9
[INFO] [stdout]      |
[INFO] [stdout] 1018 |         fields: &'static [&'static str],
[INFO] [stdout]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "53485c6c8824f5a77aeec7cfd027617627f5947b5dc939f87839a24f05c804c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53485c6c8824f5a77aeec7cfd027617627f5947b5dc939f87839a24f05c804c4", kill_on_drop: false }`
[INFO] [stdout] 53485c6c8824f5a77aeec7cfd027617627f5947b5dc939f87839a24f05c804c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e27b4ebe7bbbcbbf714342ab31c4eb3f275045ca75d9bd9c4edcab25a2661fe0
[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" "e27b4ebe7bbbcbbf714342ab31c4eb3f275045ca75d9bd9c4edcab25a2661fe0", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]     --> src/lib.rs:1006:31
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stderr]      |                               ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fields`
[INFO] [stderr]     --> src/lib.rs:1018:9
[INFO] [stderr]      |
[INFO] [stderr] 1018 |         fields: &'static [&'static str],
[INFO] [stderr]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]     --> src/lib.rs:1006:31
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stderr]      |                               ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fields`
[INFO] [stderr]     --> src/lib.rs:1018:9
[INFO] [stderr]      |
[INFO] [stderr] 1018 |         fields: &'static [&'static str],
[INFO] [stderr]      |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_fields`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/serde_object-4fe1492bb929f6ff
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serde-object
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e27b4ebe7bbbcbbf714342ab31c4eb3f275045ca75d9bd9c4edcab25a2661fe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e27b4ebe7bbbcbbf714342ab31c4eb3f275045ca75d9bd9c4edcab25a2661fe0", kill_on_drop: false }`
[INFO] [stdout] e27b4ebe7bbbcbbf714342ab31c4eb3f275045ca75d9bd9c4edcab25a2661fe0