[INFO] fetching crate gob 0.1.0...
[INFO] checking gob-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate gob 0.1.0 into /workspace/builds/worker-50/source
[INFO] validating manifest of crates.io crate gob 0.1.0 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 gob 0.1.0
[INFO] finished tweaking crates.io crate gob 0.1.0
[INFO] tweaked toml for crates.io crate gob 0.1.0 written to /workspace/builds/worker-50/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bencher v0.1.5
[INFO] [stderr]   Downloaded serde_bytes v0.10.5
[INFO] [stderr]   Downloaded proc-macro2 v0.3.8
[INFO] [stderr]   Downloaded quote v0.5.2
[INFO] [stderr]   Downloaded quickcheck v0.6.2
[INFO] [stderr]   Downloaded syn v0.13.11
[INFO] [stderr]   Downloaded owning_ref v0.3.3
[INFO] [stderr]   Downloaded serde_schema v0.0.1
[INFO] [stderr]   Downloaded partial-io v0.3.1
[INFO] [stderr]   Downloaded serde_derive_internals v0.23.1
[INFO] [stderr]   Downloaded serde_schema_derive v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] 00d27f59c3bae15ea2c46bc2582b5a9b19bad022fab027ff94976ab57223ac1f
[INFO] running `Command { std: "docker" "start" "-a" "00d27f59c3bae15ea2c46bc2582b5a9b19bad022fab027ff94976ab57223ac1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00d27f59c3bae15ea2c46bc2582b5a9b19bad022fab027ff94976ab57223ac1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00d27f59c3bae15ea2c46bc2582b5a9b19bad022fab027ff94976ab57223ac1f", kill_on_drop: false }`
[INFO] [stdout] 00d27f59c3bae15ea2c46bc2582b5a9b19bad022fab027ff94976ab57223ac1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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] 666738ec2c8571644bcdf795f687153002da3a143b66a617c6a7c4757d6f2775
[INFO] running `Command { std: "docker" "start" "-a" "666738ec2c8571644bcdf795f687153002da3a143b66a617c6a7c4757d6f2775", kill_on_drop: false }`
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking serde_schema v0.0.1
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]     Checking quickcheck v0.6.2
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]     Checking partial-io v0.3.1
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling serde_schema_derive v0.0.1
[INFO] [stderr]     Checking gob v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/internal/types/struct_type.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         { Type::build().seq_type(None, TypeId::FIELD_TYPE) };
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_braces)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/internal/types/struct_type.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         { Type::build().seq_type(None, TypeId::FIELD_TYPE) };
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_braces)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:41:58
[INFO] [stdout]    |
[INFO] [stdout] 41 |                 write!(f, "{}: {}", ::std::error::Error::description(self), msg)
[INFO] [stdout]    |                                                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(deprecated)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:41:58
[INFO] [stdout]    |
[INFO] [stdout] 41 |                 write!(f, "{}: {}", ::std::error::Error::description(self), msg)
[INFO] [stdout]    |                                                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(deprecated)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/internal/ser/serialize_wire_types.rs:110:29
[INFO] [stdout]     |
[INFO] [stdout] 110 |                         let mut ser = FieldValueSerializer {
[INFO] [stdout]     |                             ----^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:1:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_mut)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/internal/ser/serialize_wire_types.rs:110:29
[INFO] [stdout]     |
[INFO] [stdout] 110 |                         let mut ser = FieldValueSerializer {
[INFO] [stdout]     |                             ----^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:1:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_mut)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> tests/de.rs:382:26
[INFO] [stdout]     |
[INFO] [stdout] 382 |     struct EmptyStruct {};
[INFO] [stdout]     |                          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `serde_bytes::Bytes<'_>: SchemaSerialize` is not satisfied
[INFO] [stdout]    --> tests/ser.rs:279:26
[INFO] [stdout]     |
[INFO] [stdout] 279 |         stream.serialize(&Bytes::new(&[])).unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ the trait `SchemaSerialize` is not implemented for `serde_bytes::Bytes<'_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `serde_bytes::Bytes<'_>: SchemaSerialize` is not satisfied
[INFO] [stdout]    --> tests/ser.rs:289:26
[INFO] [stdout]     |
[INFO] [stdout] 289 |         stream.serialize(&Bytes::new(&[1, 2, 3, 4])).unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `SchemaSerialize` is not implemented for `serde_bytes::Bytes<'_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `serde_bytes::Bytes<'_>: SchemaSerialize` is not satisfied
[INFO] [stdout]    --> tests/ser.rs:544:16
[INFO] [stdout]     |
[INFO] [stdout] 544 |         stream.serialize::<Option<Bytes>>(&None).unwrap();
[INFO] [stdout]     |                ^^^^^^^^^ the trait `SchemaSerialize` is not implemented for `serde_bytes::Bytes<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: required because of the requirements on the impl of `SchemaSerialize` for `std::option::Option<serde_bytes::Bytes<'_>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `serde_bytes::Bytes<'_>: SchemaSerialize` is not satisfied
[INFO] [stdout]    --> tests/ser.rs:563:26
[INFO] [stdout]     |
[INFO] [stdout] 563 |         stream.serialize(&Some(Bytes::new(&[0x1, 0x2]))).unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `SchemaSerialize` is not implemented for `serde_bytes::Bytes<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: required because of the requirements on the impl of `SchemaSerialize` for `std::option::Option<serde_bytes::Bytes<'_>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gob` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "666738ec2c8571644bcdf795f687153002da3a143b66a617c6a7c4757d6f2775", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "666738ec2c8571644bcdf795f687153002da3a143b66a617c6a7c4757d6f2775", kill_on_drop: false }`
[INFO] [stdout] 666738ec2c8571644bcdf795f687153002da3a143b66a617c6a7c4757d6f2775
