[INFO] cloning repository https://github.com/b-inary/wasm-postflop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/b-inary/wasm-postflop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-inary%2Fwasm-postflop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-inary%2Fwasm-postflop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0fe2fdb42534221b200511f1306fba578dd410a8
[INFO] testing b-inary/wasm-postflop against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-inary%2Fwasm-postflop" "/workspace/builds/worker-20/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-20/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/b-inary/wasm-postflop on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-20/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/b-inary/wasm-postflop
[INFO] finished tweaking git repo https://github.com/b-inary/wasm-postflop
[INFO] tweaked toml for git repo https://github.com/b-inary/wasm-postflop written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate git repo https://github.com/b-inary/wasm-postflop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/b-inary/postflop-solver`
[INFO] [stderr]     Updating git repository `https://github.com/b-inary/holdem-hand-evaluator`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spmc v0.3.0
[INFO] [stderr]   Downloaded wasm-bindgen-rayon v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cbd6be8cd9d5bf39e4a428b9a0cef0f4c2aebbaf96a6e1a26374d6fa2b562c5
[INFO] running `Command { std: "docker" "start" "-a" "6cbd6be8cd9d5bf39e4a428b9a0cef0f4c2aebbaf96a6e1a26374d6fa2b562c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cbd6be8cd9d5bf39e4a428b9a0cef0f4c2aebbaf96a6e1a26374d6fa2b562c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cbd6be8cd9d5bf39e4a428b9a0cef0f4c2aebbaf96a6e1a26374d6fa2b562c5", kill_on_drop: false }`
[INFO] [stdout] 6cbd6be8cd9d5bf39e4a428b9a0cef0f4c2aebbaf96a6e1a26374d6fa2b562c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdc13bb89610da01c0ba71a74756c5c46e4bfc2689357b5f9b9f72288bc83af6
[INFO] running `Command { std: "docker" "start" "-a" "bdc13bb89610da01c0ba71a74756c5c46e4bfc2689357b5f9b9f72288bc83af6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.79
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling bumpalo v3.9.1
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.79
[INFO] [stderr]    Compiling holdem-hand-evaluator-assets v0.1.0 (https://github.com/b-inary/holdem-hand-evaluator#0931fbb8)
[INFO] [stderr]    Compiling spmc v0.3.0
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling holdem-hand-evaluator v0.1.0 (https://github.com/b-inary/holdem-hand-evaluator#0931fbb8)
[INFO] [stderr]    Compiling crossbeam-channel v0.5.4
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.79
[INFO] [stderr]    Compiling postflop-solver v0.1.0 (https://github.com/b-inary/postflop-solver#4aaf4f76)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/postflop-solver-fd45a127bf18e31a/4aaf4f7/src/lib.rs:51:47
[INFO] [stdout]    |
[INFO] [stdout] 51 | #![cfg_attr(feature = "custom_alloc", feature(allocator_api))]
[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 `postflop-solver` 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" "bdc13bb89610da01c0ba71a74756c5c46e4bfc2689357b5f9b9f72288bc83af6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdc13bb89610da01c0ba71a74756c5c46e4bfc2689357b5f9b9f72288bc83af6", kill_on_drop: false }`
[INFO] [stdout] bdc13bb89610da01c0ba71a74756c5c46e4bfc2689357b5f9b9f72288bc83af6