[INFO] fetching crate casperlabs-erc20 2.0.3...
[INFO] checking casperlabs-erc20-2.0.3 against 1.95.0 for pr-155915
[INFO] extracting crate casperlabs-erc20 2.0.3 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate casperlabs-erc20 2.0.3
[INFO] finished tweaking crates.io crate casperlabs-erc20 2.0.3
[INFO] tweaked toml for crates.io crate casperlabs-erc20 2.0.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate casperlabs-erc20 2.0.3 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 82 packages to latest compatible versions
[INFO] [stderr]       Adding casper-contract v1.4.4 (available: v5.1.1)
[INFO] [stderr]       Adding casper-types v1.5.0 (available: v7.0.0)
[INFO] [stderr]       Adding ed25519 v1.2.0 (available: v1.5.3)
[INFO] [stderr]       Adding signature v1.2.2 (available: v1.6.4)
[INFO] [stderr]       Adding subtle v2.4.1 (available: v2.6.1)
[INFO] [stderr]       Adding zeroize v1.3.0 (available: v1.8.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zeroize v1.3.0
[INFO] [stderr]   Downloaded casper_types_derive v0.1.0
[INFO] [stderr]   Downloaded k256 v0.7.3
[INFO] [stderr]   Downloaded ff v0.8.0
[INFO] [stderr]   Downloaded casperlabs-contract-utils v0.2.2
[INFO] [stderr]   Downloaded group v0.8.0
[INFO] [stderr]   Downloaded elliptic-curve v0.8.5
[INFO] [stderr]   Downloaded memory_units v0.4.0
[INFO] [stderr]   Downloaded casper-erc20-crate v0.1.3
[INFO] [stderr]   Downloaded hex_fmt v0.3.0
[INFO] [stderr]   Downloaded ed25519-dalek v1.0.1
[INFO] [stderr]   Downloaded signature v1.2.2
[INFO] [stderr]   Downloaded radium v0.3.0
[INFO] [stderr]   Downloaded base16 v0.2.1
[INFO] [stderr]   Downloaded casper-contract v1.4.4
[INFO] [stderr]   Downloaded ed25519 v1.2.0
[INFO] [stderr]   Downloaded wee_alloc v0.4.5
[INFO] [stderr]   Downloaded ecdsa v0.10.2
[INFO] [stderr]   Downloaded bitvec v0.18.5
[INFO] [stderr]   Downloaded casper-types v1.5.0
[INFO] [stderr]   Downloaded curve25519-dalek v3.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88fb8040667e2cc8b3b0ce2617113fcf94c6e459be2c096a2111ca8922ce7ea4
[INFO] running `Command { std: "docker" "start" "-a" "88fb8040667e2cc8b3b0ce2617113fcf94c6e459be2c096a2111ca8922ce7ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88fb8040667e2cc8b3b0ce2617113fcf94c6e459be2c096a2111ca8922ce7ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88fb8040667e2cc8b3b0ce2617113fcf94c6e459be2c096a2111ca8922ce7ea4", kill_on_drop: false }`
[INFO] [stdout] 88fb8040667e2cc8b3b0ce2617113fcf94c6e459be2c096a2111ca8922ce7ea4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a036af76c6e3fe7235c2e7f6e8a2b68ea1a5ef5371272c2d1b2dfb9bbbed663
[INFO] running `Command { std: "docker" "start" "-a" "3a036af76c6e3fe7235c2e7f6e8a2b68ea1a5ef5371272c2d1b2dfb9bbbed663", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-array v0.14.9
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking bitvec v0.18.5
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.10.1
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking signature v1.2.2
[INFO] [stderr]     Checking hmac v0.10.1
[INFO] [stderr]     Checking ed25519 v1.2.0
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]     Checking rand v0.8.6
[INFO] [stderr]     Checking blake2 v0.9.2
[INFO] [stderr]     Checking memory_units v0.4.0
[INFO] [stderr]     Checking hex_fmt v0.3.0
[INFO] [stderr]     Checking base16 v0.2.1
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling casper_types_derive v0.1.0
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking serde_bytes v0.11.19
[INFO] [stderr]     Checking ff v0.8.0
[INFO] [stderr]     Checking group v0.8.0
[INFO] [stderr]    Compiling zeroize_derive v1.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking zeroize v1.3.0
[INFO] [stderr]     Checking elliptic-curve v0.8.5
[INFO] [stderr]     Checking curve25519-dalek v3.2.1
[INFO] [stderr]     Checking ecdsa v0.10.2
[INFO] [stderr]     Checking k256 v0.7.3
[INFO] [stderr]     Checking ed25519-dalek v1.0.1
[INFO] [stderr]     Checking casper-types v1.5.0
[INFO] [stderr]     Checking casper-contract v1.4.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/casper-contract-1.4.4/src/lib.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     feature(alloc_error_handler, core_intrinsics, lang_items)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `casper-contract` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "3a036af76c6e3fe7235c2e7f6e8a2b68ea1a5ef5371272c2d1b2dfb9bbbed663", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a036af76c6e3fe7235c2e7f6e8a2b68ea1a5ef5371272c2d1b2dfb9bbbed663", kill_on_drop: false }`
[INFO] [stdout] 3a036af76c6e3fe7235c2e7f6e8a2b68ea1a5ef5371272c2d1b2dfb9bbbed663
