[INFO] cloning repository https://github.com/JiangXb-son/zokrates_0331
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JiangXb-son/zokrates_0331" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJiangXb-son%2Fzokrates_0331", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJiangXb-son%2Fzokrates_0331'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0bbecb43ff9aa42eda5adf6f9a439fa0315d778f
[INFO] testing JiangXb-son/zokrates_0331 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJiangXb-son%2Fzokrates_0331" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JiangXb-son/zokrates_0331 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/JiangXb-son/zokrates_0331
[INFO] finished tweaking git repo https://github.com/JiangXb-son/zokrates_0331
[INFO] tweaked toml for git repo https://github.com/JiangXb-son/zokrates_0331 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/JiangXb-son/zokrates_0331 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5daa4b89a7c0d471c51738554fdb497b90d303a5f71cf8de6f55b6be875cff1d
[INFO] running `Command { std: "docker" "start" "-a" "5daa4b89a7c0d471c51738554fdb497b90d303a5f71cf8de6f55b6be875cff1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5daa4b89a7c0d471c51738554fdb497b90d303a5f71cf8de6f55b6be875cff1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5daa4b89a7c0d471c51738554fdb497b90d303a5f71cf8de6f55b6be875cff1d", kill_on_drop: false }`
[INFO] [stdout] 5daa4b89a7c0d471c51738554fdb497b90d303a5f71cf8de6f55b6be875cff1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 3a9531f902765ac8b8716b29e722d7d28e111a754520bd3045eecf3db075595d
[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" "3a9531f902765ac8b8716b29e722d7d28e111a754520bd3045eecf3db075595d", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling tiny-keccak v2.0.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling ucd-util v0.1.7
[INFO] [stderr]    Compiling zokrates_core v0.4.2 (/opt/rustwide/workdir/zokrates_core)
[INFO] [stderr]    Compiling reduce v0.1.2
[INFO] [stderr]    Compiling typed-arena v1.7.0
[INFO] [stderr]    Compiling zokrates_fs_resolver v0.5.0 (/opt/rustwide/workdir/zokrates_fs_resolver)
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling pest v2.1.2
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling zokrates_cli v0.5.2 (/opt/rustwide/workdir/zokrates_cli)
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling regex-automata v0.1.8
[INFO] [stderr]    Compiling serde_bytes v0.10.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling blake2-rfc_bellman_edition v0.0.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling bincode v0.8.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling backtrace v0.3.44
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling bstr v0.2.11
[INFO] [stderr]    Compiling pest_meta v2.1.2
[INFO] [stderr]    Compiling from-pest v0.3.1
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]    Compiling ff_derive_ce v0.5.1
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling single v1.0.0
[INFO] [stderr]    Compiling pest-ast v0.3.3
[INFO] [stderr]    Compiling zokrates_parser v0.1.4 (/opt/rustwide/workdir/zokrates_parser)
[INFO] [stderr]    Compiling ff_ce v0.7.1
[INFO] [stderr]    Compiling pairing_ce v0.18.0
[INFO] [stderr]    Compiling zokrates_field v0.3.5 (/opt/rustwide/workdir/zokrates_field)
[INFO] [stderr]    Compiling bellman_ce v0.3.1
[INFO] [stderr]    Compiling bellman_ce v0.3.1 (https://github.com/matter-labs/bellman?rev=9e35737#9e357372)
[INFO] [stderr]    Compiling zokrates_pest_ast v0.1.3 (/opt/rustwide/workdir/zokrates_pest_ast)
[INFO] [stderr]    Compiling sapling-crypto_ce v0.1.2
[INFO] [stderr]    Compiling zokrates_embed v0.1.1 (/opt/rustwide/workdir/zokrates_embed)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> zokrates_core/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns, box_syntax)]
[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 `zokrates_core` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3a9531f902765ac8b8716b29e722d7d28e111a754520bd3045eecf3db075595d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a9531f902765ac8b8716b29e722d7d28e111a754520bd3045eecf3db075595d", kill_on_drop: false }`
[INFO] [stdout] 3a9531f902765ac8b8716b29e722d7d28e111a754520bd3045eecf3db075595d