[INFO] cloning repository https://github.com/jahmed76/ink-erc721
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jahmed76/ink-erc721" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjahmed76%2Fink-erc721", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjahmed76%2Fink-erc721'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 763b368551e2de9a86e98888101fae77d9764abb
[INFO] testing jahmed76/ink-erc721 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjahmed76%2Fink-erc721" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jahmed76/ink-erc721 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 git repo https://github.com/jahmed76/ink-erc721
[INFO] finished tweaking git repo https://github.com/jahmed76/ink-erc721
[INFO] tweaked toml for git repo https://github.com/jahmed76/ink-erc721 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/jahmed76/ink-erc721 already has a lockfile, it will not be regenerated
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tap v1.0.1
[INFO] [stderr]   Downloaded impl-serde v0.3.1
[INFO] [stderr]   Downloaded blake2 v0.9.1
[INFO] [stderr]   Downloaded tinytemplate v1.2.0
[INFO] [stderr]   Downloaded sha2 v0.9.2
[INFO] [stderr]   Downloaded block-padding v0.2.1
[INFO] [stderr]   Downloaded funty v1.1.0
[INFO] [stderr]   Downloaded byte-slice-cast v1.0.0
[INFO] [stderr]   Downloaded parity-scale-codec-derive v2.1.0
[INFO] [stderr]   Downloaded bstr v0.2.14
[INFO] [stderr]   Downloaded ink_lang v3.0.0-rc3
[INFO] [stderr]   Downloaded sha3 v0.9.1
[INFO] [stderr]   Downloaded ink_prelude v3.0.0-rc3
[INFO] [stderr]   Downloaded array-init v1.0.0
[INFO] [stderr]   Downloaded ink_lang_macro v3.0.0-rc3
[INFO] [stderr]   Downloaded scale-info-derive v0.4.0
[INFO] [stderr]   Downloaded ink_lang_ir v3.0.0-rc3
[INFO] [stderr]   Downloaded ink_lang_codegen v3.0.0-rc3
[INFO] [stderr]   Downloaded ink_allocator v3.0.0-rc3
[INFO] [stderr]   Downloaded radium v0.6.2
[INFO] [stderr]   Downloaded bitvec v0.20.2
[INFO] [stderr]   Downloaded thread_local v1.1.0
[INFO] [stderr]   Downloaded criterion v0.3.3
[INFO] [stderr]   Downloaded ink_storage_derive v3.0.0-rc3
[INFO] [stderr]   Downloaded keccak v0.1.0
[INFO] [stderr]   Downloaded arrayvec v0.7.0
[INFO] [stderr]   Downloaded parity-scale-codec v2.1.0
[INFO] [stderr]   Downloaded scale-info v0.6.0
[INFO] [stderr]   Downloaded ink_storage v3.0.0-rc3
[INFO] [stderr]   Downloaded ink_metadata v3.0.0-rc3
[INFO] [stderr]   Downloaded ink_env v3.0.0-rc3
[INFO] [stderr]   Downloaded ink_primitives v3.0.0-rc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] e3c4f49a61864231dac6b7dca822ed26045847657e96c1e1b46f9166fda7257b
[INFO] running `Command { std: "docker" "start" "-a" "e3c4f49a61864231dac6b7dca822ed26045847657e96c1e1b46f9166fda7257b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3c4f49a61864231dac6b7dca822ed26045847657e96c1e1b46f9166fda7257b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3c4f49a61864231dac6b7dca822ed26045847657e96c1e1b46f9166fda7257b", kill_on_drop: false }`
[INFO] [stdout] e3c4f49a61864231dac6b7dca822ed26045847657e96c1e1b46f9166fda7257b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 1ef076d28991fbe310b9fe7187e2b018fe6cadafe0678cde46971724ec9365ac
[INFO] running `Command { std: "docker" "start" "-a" "1ef076d28991fbe310b9fe7187e2b018fe6cadafe0678cde46971724ec9365ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.120
[INFO] [stderr]    Compiling serde v1.0.120
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling arrayvec v0.7.0
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]    Compiling byte-slice-cast v1.0.0
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling block-padding v0.2.1
[INFO] [stderr]    Compiling byteorder v1.4.2
[INFO] [stderr]    Compiling memory_units v0.4.0
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]    Compiling array-init v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling thread_local v1.1.0
[INFO] [stderr]    Compiling ink_prelude v3.0.0-rc3
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling plotters v0.2.15
[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/array-init-1.0.0/src/lib.rs:2:41
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "const-generics", feature(const_generics))]
[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 `array-init` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1ef076d28991fbe310b9fe7187e2b018fe6cadafe0678cde46971724ec9365ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ef076d28991fbe310b9fe7187e2b018fe6cadafe0678cde46971724ec9365ac", kill_on_drop: false }`
[INFO] [stdout] 1ef076d28991fbe310b9fe7187e2b018fe6cadafe0678cde46971724ec9365ac