[INFO] fetching crate serde_rec 0.1.0...
[INFO] testing serde_rec-0.1.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2
[INFO] extracting crate serde_rec 0.1.0 into /workspace/builds/worker-1-tc2/source
[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-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_rec 0.1.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf164659242f531544d914d5839be40de9b10f218da612dec0ed1684f94ff4b8
[INFO] running `Command { std: "docker" "start" "-a" "bf164659242f531544d914d5839be40de9b10f218da612dec0ed1684f94ff4b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf164659242f531544d914d5839be40de9b10f218da612dec0ed1684f94ff4b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf164659242f531544d914d5839be40de9b10f218da612dec0ed1684f94ff4b8", kill_on_drop: false }`
[INFO] [stdout] bf164659242f531544d914d5839be40de9b10f218da612dec0ed1684f94ff4b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d195560d68fdcaaf3e1bc4ac4a945efcbf79888ff83ecbd511e1c4d004e6af72
[INFO] running `Command { std: "docker" "start" "-a" "d195560d68fdcaaf3e1bc4ac4a945efcbf79888ff83ecbd511e1c4d004e6af72", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_rec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SerializerSeq` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.08s
[INFO] running `Command { std: "docker" "inspect" "d195560d68fdcaaf3e1bc4ac4a945efcbf79888ff83ecbd511e1c4d004e6af72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d195560d68fdcaaf3e1bc4ac4a945efcbf79888ff83ecbd511e1c4d004e6af72", kill_on_drop: false }`
[INFO] [stdout] d195560d68fdcaaf3e1bc4ac4a945efcbf79888ff83ecbd511e1c4d004e6af72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56b85fa415da5acd5cc86e882689c206efa512fc7c950bc9731a4dcd35453eef
[INFO] running `Command { std: "docker" "start" "-a" "56b85fa415da5acd5cc86e882689c206efa512fc7c950bc9731a4dcd35453eef", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_rec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SerializerSeq` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SerializerSeq` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "56b85fa415da5acd5cc86e882689c206efa512fc7c950bc9731a4dcd35453eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56b85fa415da5acd5cc86e882689c206efa512fc7c950bc9731a4dcd35453eef", kill_on_drop: false }`
[INFO] [stdout] 56b85fa415da5acd5cc86e882689c206efa512fc7c950bc9731a4dcd35453eef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] acbebec3f0d1eb4dbb6b5748597f712b6e997185fb769477d0853f5fbf5ee4fa
[INFO] running `Command { std: "docker" "start" "-a" "acbebec3f0d1eb4dbb6b5748597f712b6e997185fb769477d0853f5fbf5ee4fa", kill_on_drop: false }`
[INFO] [stderr] warning: field `length` is never read
[INFO] [stderr]    --> src/ser.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stderr]     |            ------------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 227 |     length: usize,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `SerializerSeq` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: `serde_rec` (lib) generated 1 warning
[INFO] [stdout] running 2 tests
[INFO] [stderr] warning: `serde_rec` (lib test) generated 1 warning (1 duplicate)
[INFO] [stdout] test ser::tests::test_basic ... ok
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serde_rec-9f350c90a790d15a)
[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 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serde_rec
[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" "acbebec3f0d1eb4dbb6b5748597f712b6e997185fb769477d0853f5fbf5ee4fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acbebec3f0d1eb4dbb6b5748597f712b6e997185fb769477d0853f5fbf5ee4fa", kill_on_drop: false }`
[INFO] [stdout] acbebec3f0d1eb4dbb6b5748597f712b6e997185fb769477d0853f5fbf5ee4fa