[INFO] fetching crate simple_predicates-rs 0.1.0...
[INFO] testing simple_predicates-rs-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate simple_predicates-rs 0.1.0 into /workspace/builds/worker-69/source
[INFO] validating manifest of crates.io crate simple_predicates-rs 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple_predicates-rs 0.1.0
[INFO] finished tweaking crates.io crate simple_predicates-rs 0.1.0
[INFO] tweaked toml for crates.io crate simple_predicates-rs 0.1.0 written to /workspace/builds/worker-69/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e22265d57bbc5c174be7d13b7816d4ce3fd44c291bac16ff034d9df4f1d39ebc
[INFO] running `Command { std: "docker" "start" "-a" "e22265d57bbc5c174be7d13b7816d4ce3fd44c291bac16ff034d9df4f1d39ebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e22265d57bbc5c174be7d13b7816d4ce3fd44c291bac16ff034d9df4f1d39ebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e22265d57bbc5c174be7d13b7816d4ce3fd44c291bac16ff034d9df4f1d39ebc", kill_on_drop: false }`
[INFO] [stdout] e22265d57bbc5c174be7d13b7816d4ce3fd44c291bac16ff034d9df4f1d39ebc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba5731847800427681ec295a43c6dc285eb9a7cdfa02ced3c502525962e97bd9
[INFO] running `Command { std: "docker" "start" "-a" "ba5731847800427681ec295a43c6dc285eb9a7cdfa02ced3c502525962e97bd9", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple_predicates-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "ba5731847800427681ec295a43c6dc285eb9a7cdfa02ced3c502525962e97bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba5731847800427681ec295a43c6dc285eb9a7cdfa02ced3c502525962e97bd9", kill_on_drop: false }`
[INFO] [stdout] ba5731847800427681ec295a43c6dc285eb9a7cdfa02ced3c502525962e97bd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f8c9484ae94d6469acc40556f565add746a7dbf72b6927eddce5b485083daaf
[INFO] running `Command { std: "docker" "start" "-a" "6f8c9484ae94d6469acc40556f565add746a7dbf72b6927eddce5b485083daaf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling ron v0.6.5
[INFO] [stderr]    Compiling simple_predicates-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `Expr<{integer}>: serde::ser::Serialize` is not satisfied
[INFO] [stdout]    --> src/tests.rs:191:33
[INFO] [stdout]     |
[INFO] [stdout] 191 |     let s = ron::ser::to_string(&expr).unwrap();
[INFO] [stdout]     |                                 ^^^^^ the trait `serde::ser::Serialize` is not implemented for `Expr<{integer}>`
[INFO] [stdout]     |
[INFO] [stdout] note: required by a bound in `ron::to_string`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ron-0.6.5/src/ser/mod.rs:40:8
[INFO] [stdout]     |
[INFO] [stdout] 40  |     T: Serialize,
[INFO] [stdout]     |        ^^^^^^^^^ required by this bound in `ron::to_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant or associated item named `deserialize` found for enum `Expr` in the current scope
[INFO] [stdout]    --> src/tests.rs:210:21
[INFO] [stdout]     |
[INFO] [stdout] 210 |     let res = Expr::deserialize(&mut d).unwrap();
[INFO] [stdout]     |                     ^^^^^^^^^^^ variant or associated item not found in `Expr<_>`
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:71:1
[INFO] [stdout]     |
[INFO] [stdout] 71  | pub enum Expr<T> {
[INFO] [stdout]     | ---------------- variant or associated item `deserialize` not found here
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following traits define an item `deserialize`, perhaps you need to implement one of them:
[INFO] [stdout]             candidate #1: `serde::de::Deserialize`
[INFO] [stdout]             candidate #2: `serde::de::DeserializeSeed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple_predicates-rs` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "6f8c9484ae94d6469acc40556f565add746a7dbf72b6927eddce5b485083daaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f8c9484ae94d6469acc40556f565add746a7dbf72b6927eddce5b485083daaf", kill_on_drop: false }`
[INFO] [stdout] 6f8c9484ae94d6469acc40556f565add746a7dbf72b6927eddce5b485083daaf