[INFO] fetching crate canonical_collections 0.4.0...
[INFO] checking canonical_collections-0.4.0 against 1.95.0 for pr-155915
[INFO] extracting crate canonical_collections 0.4.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate canonical_collections 0.4.0
[INFO] finished tweaking crates.io crate canonical_collections 0.4.0
[INFO] tweaked toml for crates.io crate canonical_collections 0.4.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate canonical_collections 0.4.0 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 112 packages to latest compatible versions
[INFO] [stderr]       Adding canonical v0.4.4 (available: v0.7.1)
[INFO] [stderr]       Adding canonical_derive v0.4.1 (available: v0.7.0)
[INFO] [stderr]       Adding canonical_host v0.4.3 (available: v0.5.0)
[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 canonical_derive v0.4.1
[INFO] [stderr]   Downloaded wasmi v0.6.2
[INFO] [stderr]   Downloaded wasmi-validation v0.3.0
[INFO] [stderr]   Downloaded canonical v0.4.4
[INFO] [stderr]   Downloaded derive_arbitrary v0.3.3
[INFO] [stderr]   Downloaded seahash v3.0.7
[INFO] [stderr]   Downloaded blake2b_simd v0.3.1
[INFO] [stderr]   Downloaded arbitrary v0.3.3
[INFO] [stderr]   Downloaded memory_units v0.3.0
[INFO] [stderr]   Downloaded appendix v0.2.2
[INFO] [stderr]   Downloaded parity-wasm v0.41.0
[INFO] [stderr]   Downloaded canonical_host v0.4.3
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aaa9d478ef8f5914f20ed4991efe611b98cb59acef1d7faa8985b45e89c0461c
[INFO] running `Command { std: "docker" "start" "-a" "aaa9d478ef8f5914f20ed4991efe611b98cb59acef1d7faa8985b45e89c0461c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aaa9d478ef8f5914f20ed4991efe611b98cb59acef1d7faa8985b45e89c0461c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaa9d478ef8f5914f20ed4991efe611b98cb59acef1d7faa8985b45e89c0461c", kill_on_drop: false }`
[INFO] [stdout] aaa9d478ef8f5914f20ed4991efe611b98cb59acef1d7faa8985b45e89c0461c
[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=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] 9fcf9d26fe32ba59aea86eed06f03f7b5a4c40dbdebc23f86a48116d2445388b
[INFO] running `Command { std: "docker" "start" "-a" "9fcf9d26fe32ba59aea86eed06f03f7b5a4c40dbdebc23f86a48116d2445388b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking parity-wasm v0.41.0
[INFO] [stderr]     Checking parking_lot_core v0.8.6
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking memory_units v0.3.0
[INFO] [stderr]     Checking seahash v3.0.7
[INFO] [stderr]     Checking tempfile v3.27.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]    Compiling blake2b_simd v0.3.1
[INFO] [stderr]     Checking wasmi-validation v0.3.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking wasmi v0.6.2
[INFO] [stderr]     Checking appendix v0.2.2
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling derive_arbitrary v0.3.3
[INFO] [stderr]    Compiling arbitrary v0.3.3
[INFO] [stderr]     Checking canonical v0.4.4
[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/canonical-0.4.4/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(min_const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `min_const_generics` has been stable since `1.51.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[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/canonical-0.4.4/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(min_const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `min_const_generics` has been stable since `1.51.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `canonical` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `canonical` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9fcf9d26fe32ba59aea86eed06f03f7b5a4c40dbdebc23f86a48116d2445388b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fcf9d26fe32ba59aea86eed06f03f7b5a4c40dbdebc23f86a48116d2445388b", kill_on_drop: false }`
[INFO] [stdout] 9fcf9d26fe32ba59aea86eed06f03f7b5a4c40dbdebc23f86a48116d2445388b
