[INFO] fetching crate cpclib-macros 0.4.4...
[INFO] testing cpclib-macros-0.4.4 against 1.55.0 for beta-1.56-1
[INFO] extracting crate cpclib-macros 0.4.4 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate cpclib-macros 0.4.4 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 cpclib-macros 0.4.4
[INFO] finished tweaking crates.io crate cpclib-macros 0.4.4
[INFO] tweaked toml for crates.io crate cpclib-macros 0.4.4 written to /workspace/builds/worker-10/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 2b15cbbf8443084464c2c961511f18bbf28f68ddaa3de8483eab516ca8c024c7
[INFO] running `Command { std: "docker" "start" "-a" "2b15cbbf8443084464c2c961511f18bbf28f68ddaa3de8483eab516ca8c024c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b15cbbf8443084464c2c961511f18bbf28f68ddaa3de8483eab516ca8c024c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b15cbbf8443084464c2c961511f18bbf28f68ddaa3de8483eab516ca8c024c7", kill_on_drop: false }`
[INFO] [stdout] 2b15cbbf8443084464c2c961511f18bbf28f68ddaa3de8483eab516ca8c024c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 8c68781c1c2627511896d6c41b54f70cfbddb331c38cba3753dbe1214dc7a56f
[INFO] running `Command { std: "docker" "start" "-a" "8c68781c1c2627511896d6c41b54f70cfbddb331c38cba3753dbe1214dc7a56f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling bitsets v0.1.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling custom_error v1.9.2
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling chardet v0.2.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling object v0.26.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling tinyvec v1.3.1
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling encoding v0.2.33
[INFO] [stderr]    Compiling addr2line v0.16.0
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling num-complex v0.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling delegate v0.5.2
[INFO] [stderr]    Compiling remain v0.2.2
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling num v0.3.1
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling cargo-lock v4.0.1
[INFO] [stderr]    Compiling proc-macro-crate v1.0.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.4
[INFO] [stderr]    Compiling built v0.4.4
[INFO] [stderr]    Compiling cpclib-sna v0.4.4
[INFO] [stderr]    Compiling cpclib-tokens v0.4.4
[INFO] [stderr]    Compiling cpclib-disc v0.4.4
[INFO] [stderr]    Compiling cpclib-basic v0.4.4
[INFO] [stderr]    Compiling cpclib-asm v0.4.4
[INFO] [stderr]    Compiling num_enum v0.5.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cpclib-tokens-0.4.4/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cpclib-tokens-0.4.4/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cpclib-tokens` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "8c68781c1c2627511896d6c41b54f70cfbddb331c38cba3753dbe1214dc7a56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c68781c1c2627511896d6c41b54f70cfbddb331c38cba3753dbe1214dc7a56f", kill_on_drop: false }`
[INFO] [stdout] 8c68781c1c2627511896d6c41b54f70cfbddb331c38cba3753dbe1214dc7a56f