[INFO] fetching crate serde_rec 0.1.0...
[INFO] testing serde_rec-0.1.0 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate serde_rec 0.1.0 into /workspace/builds/worker-82/source
[INFO] validating manifest of crates.io crate serde_rec 0.1.0 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_rec 0.1.0
[INFO] finished tweaking crates.io crate serde_rec 0.1.0
[INFO] tweaked toml for crates.io crate serde_rec 0.1.0 written to /workspace/builds/worker-82/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--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-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55de22808c665aa868f5cbaa82ef469770a20010b93e19022d704cbdf3bf99bc
[INFO] running `Command { std: "docker" "start" "-a" "55de22808c665aa868f5cbaa82ef469770a20010b93e19022d704cbdf3bf99bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55de22808c665aa868f5cbaa82ef469770a20010b93e19022d704cbdf3bf99bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55de22808c665aa868f5cbaa82ef469770a20010b93e19022d704cbdf3bf99bc", kill_on_drop: false }`
[INFO] [stdout] 55de22808c665aa868f5cbaa82ef469770a20010b93e19022d704cbdf3bf99bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8b7cdaca5eec092f6ea84919aee43ccd666071bf4c442798eb82e07ab6617bb
[INFO] running `Command { std: "docker" "start" "-a" "e8b7cdaca5eec092f6ea84919aee43ccd666071bf4c442798eb82e07ab6617bb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling serde_rec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `length`
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.91s
[INFO] running `Command { std: "docker" "inspect" "e8b7cdaca5eec092f6ea84919aee43ccd666071bf4c442798eb82e07ab6617bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8b7cdaca5eec092f6ea84919aee43ccd666071bf4c442798eb82e07ab6617bb", kill_on_drop: false }`
[INFO] [stdout] e8b7cdaca5eec092f6ea84919aee43ccd666071bf4c442798eb82e07ab6617bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed5870c05aa98730211adbc5890fb71dfd4a1aa204a1044f7805a374d359bb9c
[INFO] running `Command { std: "docker" "start" "-a" "ed5870c05aa98730211adbc5890fb71dfd4a1aa204a1044f7805a374d359bb9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_rec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `length`
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `length`
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "ed5870c05aa98730211adbc5890fb71dfd4a1aa204a1044f7805a374d359bb9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed5870c05aa98730211adbc5890fb71dfd4a1aa204a1044f7805a374d359bb9c", kill_on_drop: false }`
[INFO] [stdout] ed5870c05aa98730211adbc5890fb71dfd4a1aa204a1044f7805a374d359bb9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c3486b7e77b962843a6c84e849e0da80ff257dc21f96fb3da9353f4a2e6c6f1f
[INFO] running `Command { std: "docker" "start" "-a" "c3486b7e77b962843a6c84e849e0da80ff257dc21f96fb3da9353f4a2e6c6f1f", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `length`
[INFO] [stderr]    --> src/ser.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 227 |     length: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `serde_rec` (lib) generated 1 warning
[INFO] [stderr] warning: `serde_rec` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/serde_rec-cb7fa0610f51d238)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test ser::tests::test_basic ... ok
[INFO] [stderr]    Doc-tests serde_rec
[INFO] [stdout] test ser::tests::test_vec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[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" "c3486b7e77b962843a6c84e849e0da80ff257dc21f96fb3da9353f4a2e6c6f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3486b7e77b962843a6c84e849e0da80ff257dc21f96fb3da9353f4a2e6c6f1f", kill_on_drop: false }`
[INFO] [stdout] c3486b7e77b962843a6c84e849e0da80ff257dc21f96fb3da9353f4a2e6c6f1f