[INFO] fetching crate connectorx 0.2.0...
[INFO] testing connectorx-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate connectorx 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate connectorx 0.2.0 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 connectorx 0.2.0
[INFO] finished tweaking crates.io crate connectorx 0.2.0
[INFO] tweaked toml for crates.io crate connectorx 0.2.0 written to /workspace/builds/worker-12/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]  Downloading crates ...
[INFO] [stderr]   Downloaded md5 v0.6.1
[INFO] [stderr]   Downloaded pretty-hex v0.1.1
[INFO] [stderr]   Downloaded asynchronous-codec v0.5.0
[INFO] [stderr]   Downloaded async-native-tls v0.3.3
[INFO] [stderr]   Downloaded enumflags2 v0.7.1
[INFO] [stderr]   Downloaded twox-hash v1.6.1
[INFO] [stderr]   Downloaded debugid v0.7.2
[INFO] [stderr]   Downloaded iai v0.1.1
[INFO] [stderr]   Downloaded lexical v5.2.2
[INFO] [stderr]   Downloaded const-random v0.1.13
[INFO] [stderr]   Downloaded static_assertions v0.3.4
[INFO] [stderr]   Downloaded postgres-native-tls v0.5.0
[INFO] [stderr]   Downloaded bb8-tiberius v0.5.2
[INFO] [stderr]   Downloaded pprof v0.5.0
[INFO] [stderr]   Downloaded simdutf8 v0.1.3
[INFO] [stderr]   Downloaded fast-float v0.2.0
[INFO] [stderr]   Downloaded flatbuffers v0.8.4
[INFO] [stderr]   Downloaded bb8 v0.7.1
[INFO] [stderr]   Downloaded arrow v4.4.0
[INFO] [stderr]   Downloaded async-stream-impl v0.2.1
[INFO] [stderr]   Downloaded postgres v0.19.1
[INFO] [stderr]   Downloaded lru v0.4.3
[INFO] [stderr]   Downloaded polars-arrow v0.14.8
[INFO] [stderr]   Downloaded derive_utils v0.11.2
[INFO] [stderr]   Downloaded unsafe_unwrap v0.1.0
[INFO] [stderr]   Downloaded polars-lazy v0.14.8
[INFO] [stderr]   Downloaded lexical v4.2.1
[INFO] [stderr]   Downloaded polars-core v0.14.8
[INFO] [stderr]   Downloaded lexical-core v0.6.8
[INFO] [stderr]   Downloaded r2d2_sqlite v0.18.0
[INFO] [stderr]   Downloaded r2d2_postgres v0.18.1
[INFO] [stderr]   Downloaded hashbrown v0.6.3
[INFO] [stderr]   Downloaded rusqlite v0.25.3
[INFO] [stderr]   Downloaded enumflags2_derive v0.7.0
[INFO] [stderr]   Downloaded rust_decimal v1.15.0
[INFO] [stderr]   Downloaded async-stream v0.2.1
[INFO] [stderr]   Downloaded io-enum v0.2.6
[INFO] [stderr]   Downloaded polars-io v0.14.8
[INFO] [stderr]   Downloaded mysql_common v0.20.2
[INFO] [stderr]   Downloaded symbolic-demangle v8.3.0
[INFO] [stderr]   Downloaded bigdecimal v0.1.2
[INFO] [stderr]   Downloaded polars v0.14.8
[INFO] [stderr]   Downloaded bufstream v0.1.4
[INFO] [stderr]   Downloaded mysql v18.2.0
[INFO] [stderr]   Downloaded r2d2_mysql v18.0.0
[INFO] [stderr]   Downloaded named_pipe v0.4.1
[INFO] [stderr]   Downloaded tiberius v0.5.16
[INFO] [stderr]   Downloaded opentls v0.2.1
[INFO] [stderr]   Downloaded winauth v0.0.4
[INFO] [stderr]   Downloaded cpp_demangle v0.3.3
[INFO] [stderr]   Downloaded symbolic-common v8.3.0
[INFO] [stderr]   Downloaded ahash v0.2.19
[INFO] [stderr]   Downloaded nix v0.17.0
[INFO] [stderr]   Downloaded fallible-streaming-iterator v0.1.9
[INFO] [stderr]   Downloaded connection-string v0.1.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 6021b1a611e2ef9a39c48b11cff4b9d7baac94a285d21d00c9c796074fa90fce
[INFO] running `Command { std: "docker" "start" "-a" "6021b1a611e2ef9a39c48b11cff4b9d7baac94a285d21d00c9c796074fa90fce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6021b1a611e2ef9a39c48b11cff4b9d7baac94a285d21d00c9c796074fa90fce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6021b1a611e2ef9a39c48b11cff4b9d7baac94a285d21d00c9c796074fa90fce", kill_on_drop: false }`
[INFO] [stdout] 6021b1a611e2ef9a39c48b11cff4b9d7baac94a285d21d00c9c796074fa90fce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73c5fe076ed8ff5c5713234d7bb78d5199b65f2c7e14533b2f89c7414678d9b8
[INFO] running `Command { std: "docker" "start" "-a" "73c5fe076ed8ff5c5713234d7bb78d5199b65f2c7e14533b2f89c7414678d9b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling sqlparser v0.9.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling fehler-macros v1.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling fehler v1.0.0
[INFO] [stderr]    Compiling connectorx v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `connectorx` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "73c5fe076ed8ff5c5713234d7bb78d5199b65f2c7e14533b2f89c7414678d9b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73c5fe076ed8ff5c5713234d7bb78d5199b65f2c7e14533b2f89c7414678d9b8", kill_on_drop: false }`
[INFO] [stdout] 73c5fe076ed8ff5c5713234d7bb78d5199b65f2c7e14533b2f89c7414678d9b8