[INFO] fetching crate odra-casper-backend 0.6.2...
[INFO] testing odra-casper-backend-0.6.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate odra-casper-backend 0.6.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate odra-casper-backend 0.6.2
[INFO] finished tweaking crates.io crate odra-casper-backend 0.6.2
[INFO] tweaked toml for crates.io crate odra-casper-backend 0.6.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate odra-casper-backend 0.6.2 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 83 packages to latest compatible versions
[INFO] [stderr]       Adding casper-contract v4.0.0 (available: v5.1.1)
[INFO] [stderr]       Adding casper-event-standard v0.5.0 (available: v0.7.0)
[INFO] [stderr]       Adding casper-types v4.0.2 (available: v6.0.1)
[INFO] [stderr]       Adding ink_allocator v4.3.0 (available: v5.1.1)
[INFO] [stderr]       Adding odra-casper-shared v0.6.2 (available: v0.7.1)
[INFO] [stderr]       Adding odra-types v0.6.2 (available: v0.7.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded odra-utils v0.6.2
[INFO] [stderr]   Downloaded ink_allocator v4.3.0
[INFO] [stderr]   Downloaded casper-event-standard v0.5.0
[INFO] [stderr]   Downloaded odra-types v0.6.2
[INFO] [stderr]   Downloaded odra-casper-types v0.6.2
[INFO] [stderr]   Downloaded casper-contract v4.0.0
[INFO] [stderr]   Downloaded odra-casper-shared v0.6.2
[INFO] [stderr]   Downloaded casper-event-standard-macro v0.5.0
[INFO] [stderr]   Downloaded casper-types v4.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84d0378cf808041b2d713ee20d918d65db54d79fa5ab186a29a3fcbffc60f6bb
[INFO] running `Command { std: "docker" "start" "-a" "84d0378cf808041b2d713ee20d918d65db54d79fa5ab186a29a3fcbffc60f6bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84d0378cf808041b2d713ee20d918d65db54d79fa5ab186a29a3fcbffc60f6bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84d0378cf808041b2d713ee20d918d65db54d79fa5ab186a29a3fcbffc60f6bb", kill_on_drop: false }`
[INFO] [stdout] 84d0378cf808041b2d713ee20d918d65db54d79fa5ab186a29a3fcbffc60f6bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47ba584dc6d1d1466e98b9036bfb9ac131384757a9a50336cf1303f2a106851d
[INFO] running `Command { std: "docker" "start" "-a" "47ba584dc6d1d1466e98b9036bfb9ac131384757a9a50336cf1303f2a106851d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling base16ct v0.2.0
[INFO] [stderr]    Compiling der v0.7.10
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling curve25519-dalek v4.1.3
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling base16 v0.2.1
[INFO] [stderr]    Compiling hex_fmt v0.3.0
[INFO] [stderr]    Compiling ff v0.13.1
[INFO] [stderr]    Compiling crypto-bigint v0.5.5
[INFO] [stderr]    Compiling blake2 v0.9.2
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling odra-types v0.6.2
[INFO] [stderr]    Compiling group v0.13.0
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling odra-utils v0.6.2
[INFO] [stderr]    Compiling signature v2.2.0
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling sha2 v0.10.9
[INFO] [stderr]    Compiling rfc6979 v0.4.0
[INFO] [stderr]    Compiling uint v0.9.5
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling ed25519 v2.2.3
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling sec1 v0.7.3
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling casper-event-standard-macro v0.5.0
[INFO] [stderr]    Compiling elliptic-curve v0.13.8
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling ecdsa v0.16.9
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling k256 v0.13.4
[INFO] [stderr]    Compiling curve25519-dalek-derive v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling ed25519-dalek v2.2.0
[INFO] [stderr]    Compiling casper-types v4.0.2
[INFO] [stderr]    Compiling casper-event-standard v0.5.0
[INFO] [stderr]    Compiling casper-contract v4.0.0
[INFO] [stderr]    Compiling odra-casper-types v0.6.2
[INFO] [stderr]    Compiling odra-casper-shared v0.6.2
[INFO] [stderr]    Compiling odra-casper-backend v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(not(test), feature(core_intrinsics))]
[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 `odra-casper-backend` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "47ba584dc6d1d1466e98b9036bfb9ac131384757a9a50336cf1303f2a106851d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47ba584dc6d1d1466e98b9036bfb9ac131384757a9a50336cf1303f2a106851d", kill_on_drop: false }`
[INFO] [stdout] 47ba584dc6d1d1466e98b9036bfb9ac131384757a9a50336cf1303f2a106851d
