[INFO] cloning repository https://github.com/skysch/simple_predicates-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skysch/simple_predicates-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskysch%2Fsimple_predicates-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskysch%2Fsimple_predicates-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 165e4ef848c7c650607e265fb3082ff7a2fc4ef4
[INFO] checking skysch/simple_predicates-rs against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskysch%2Fsimple_predicates-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/skysch/simple_predicates-rs on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/skysch/simple_predicates-rs
[INFO] finished tweaking git repo https://github.com/skysch/simple_predicates-rs
[INFO] tweaked toml for git repo https://github.com/skysch/simple_predicates-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/skysch/simple_predicates-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-14/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", 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] 86b48aa148364cfe97503389592a70431a7e1e1760d311c5b64c55c344ed832a
[INFO] running `Command { std: "docker" "start" "-a" "86b48aa148364cfe97503389592a70431a7e1e1760d311c5b64c55c344ed832a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86b48aa148364cfe97503389592a70431a7e1e1760d311c5b64c55c344ed832a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86b48aa148364cfe97503389592a70431a7e1e1760d311c5b64c55c344ed832a", kill_on_drop: false }`
[INFO] [stdout] 86b48aa148364cfe97503389592a70431a7e1e1760d311c5b64c55c344ed832a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a9a826e8f39dbc5b9ea764e68a52d9db4c5d52bda12241a7e0bfc2bcff69c8e
[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" "3a9a826e8f39dbc5b9ea764e68a52d9db4c5d52bda12241a7e0bfc2bcff69c8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking simple_predicates v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking ron v0.6.4
[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]    ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ron-0.6.4/src/ser/mod.rs:35:8
[INFO] [stdout]     |
[INFO] [stdout] 35  |     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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "3a9a826e8f39dbc5b9ea764e68a52d9db4c5d52bda12241a7e0bfc2bcff69c8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a9a826e8f39dbc5b9ea764e68a52d9db4c5d52bda12241a7e0bfc2bcff69c8e", kill_on_drop: false }`
[INFO] [stdout] 3a9a826e8f39dbc5b9ea764e68a52d9db4c5d52bda12241a7e0bfc2bcff69c8e