[INFO] crate canonical_json 0.8.4 is already in cache
[INFO] checking canonical_json-0.8.4 against beta-2019-10-27 for pr-65897
[INFO] extracting crate canonical_json 0.8.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate canonical_json 0.8.4 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate canonical_json 0.8.4
[INFO] finished tweaking crates.io crate canonical_json 0.8.4
[INFO] tweaked toml for crates.io crate canonical_json 0.8.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a432bed49a5f91aea53589da89278760fd3c08e6d4605b8a2f21fedf1cceb977
[INFO] running `"docker" "start" "-a" "a432bed49a5f91aea53589da89278760fd3c08e6d4605b8a2f21fedf1cceb977"`
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]     Checking canonical_json v0.8.4 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0437]: type `Err` is not a member of trait `TryFrom`
[INFO] [stderr]     --> src/value.rs:1146:5
[INFO] [stderr]      |
[INFO] [stderr] 1146 |     type Err = SyntaxError;
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `TryFrom`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]    --> src/lib.rs:200:1
[INFO] [stderr]     |
[INFO] [stderr] 200 | #![feature(try_from)]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0046]: not all trait items implemented, missing: `Error`
[INFO] [stderr]     --> src/value.rs:1145:1
[INFO] [stderr]      |
[INFO] [stderr] 1145 | impl TryFrom<serde_json::Value> for Value {
[INFO] [stderr]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Error` in implementation
[INFO] [stderr]      |
[INFO] [stderr]      = note: `Error` from trait: `type Error;`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0046, E0437, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0046`.
[INFO] [stderr] error: could not compile `canonical_json`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a432bed49a5f91aea53589da89278760fd3c08e6d4605b8a2f21fedf1cceb977"`
[INFO] running `"docker" "rm" "-f" "a432bed49a5f91aea53589da89278760fd3c08e6d4605b8a2f21fedf1cceb977"`
[INFO] [stdout] a432bed49a5f91aea53589da89278760fd3c08e6d4605b8a2f21fedf1cceb977