[INFO] cloning repository https://github.com/pepyakin/substrate-contracts-adder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pepyakin/substrate-contracts-adder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpepyakin%2Fsubstrate-contracts-adder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpepyakin%2Fsubstrate-contracts-adder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 12f8f105ad48734e69461ae1f6630c24ba3d2441
[INFO] testing pepyakin/substrate-contracts-adder against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpepyakin%2Fsubstrate-contracts-adder" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pepyakin/substrate-contracts-adder 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] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/pepyakin/substrate-contracts-adder
[INFO] finished tweaking git repo https://github.com/pepyakin/substrate-contracts-adder
[INFO] tweaked toml for git repo https://github.com/pepyakin/substrate-contracts-adder written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/pepyakin/substrate-contracts-adder 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]  Downloading crates ...
[INFO] [stderr]   Downloaded parity-codec v2.0.3
[INFO] [stderr]   Downloaded parity-codec-derive v2.0.4
[INFO] [stderr]   Downloaded wee_alloc v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] fa039b7d5abb1bdea5ac995f86a3fd4f01efc9f360ddc172825c1c786a1d0d41
[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" "fa039b7d5abb1bdea5ac995f86a3fd4f01efc9f360ddc172825c1c786a1d0d41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa039b7d5abb1bdea5ac995f86a3fd4f01efc9f360ddc172825c1c786a1d0d41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa039b7d5abb1bdea5ac995f86a3fd4f01efc9f360ddc172825c1c786a1d0d41", kill_on_drop: false }`
[INFO] [stdout] fa039b7d5abb1bdea5ac995f86a3fd4f01efc9f360ddc172825c1c786a1d0d41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] bb79748b94d20b9edec8b07f20ef9fc1f4d327f56ece92497cd8dbe2ae3f0433
[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" "bb79748b94d20b9edec8b07f20ef9fc1f4d327f56ece92497cd8dbe2ae3f0433", kill_on_drop: false }`
[INFO] [stderr]    Compiling wee_alloc v0.4.2
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling parity-codec v2.0.3
[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/parity-codec-2.0.3/src/lib.rs:20:35
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![cfg_attr(not(feature = "std"), feature(alloc))]
[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 `parity-codec` 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" "bb79748b94d20b9edec8b07f20ef9fc1f4d327f56ece92497cd8dbe2ae3f0433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb79748b94d20b9edec8b07f20ef9fc1f4d327f56ece92497cd8dbe2ae3f0433", kill_on_drop: false }`
[INFO] [stdout] bb79748b94d20b9edec8b07f20ef9fc1f4d327f56ece92497cd8dbe2ae3f0433