[INFO] fetching crate loadstone_config 1.0.0...
[INFO] testing loadstone_config-1.0.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate loadstone_config 1.0.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate loadstone_config 1.0.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate loadstone_config 1.0.0
[INFO] finished tweaking crates.io crate loadstone_config 1.0.0
[INFO] tweaked toml for crates.io crate loadstone_config 1.0.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 494b6f5001fba3d3e7a76939ff3b304c24ae1363ec9e7327c05169a2cbdc8d4e
[INFO] running `Command { std: "docker" "start" "-a" "494b6f5001fba3d3e7a76939ff3b304c24ae1363ec9e7327c05169a2cbdc8d4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "494b6f5001fba3d3e7a76939ff3b304c24ae1363ec9e7327c05169a2cbdc8d4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "494b6f5001fba3d3e7a76939ff3b304c24ae1363ec9e7327c05169a2cbdc8d4e", kill_on_drop: false }`
[INFO] [stdout] 494b6f5001fba3d3e7a76939ff3b304c24ae1363ec9e7327c05169a2cbdc8d4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c70e9c0b81b4e2234c559c2a1c0439acd82d5edb2e14addc526b0b7c4d37aaa
[INFO] running `Command { std: "docker" "start" "-a" "9c70e9c0b81b4e2234c559c2a1c0439acd82d5edb2e14addc526b0b7c4d37aaa", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling subtle v2.4.1
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling const-oid v0.5.2
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling base64ct v1.0.0
[INFO] [stderr]    Compiling zeroize v1.4.1
[INFO] [stderr]    Compiling cpufeatures v0.1.5
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling signature v1.3.1
[INFO] [stderr]    Compiling crypto-mac v0.11.1
[INFO] [stderr]    Compiling hmac v0.11.0
[INFO] [stderr]    Compiling der v0.3.5
[INFO] [stderr]    Compiling sha2 v0.9.5
[INFO] [stderr]    Compiling bitvec v0.20.4
[INFO] [stderr]    Compiling spki v0.3.0
[INFO] [stderr]    Compiling pkcs8 v0.6.1
[INFO] [stderr]    Compiling ff v0.9.0
[INFO] [stderr]    Compiling group v0.9.0
[INFO] [stderr]    Compiling elliptic-curve v0.9.12
[INFO] [stderr]    Compiling ecdsa v0.11.1
[INFO] [stderr]    Compiling p256 v0.8.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling enum-iterator-derive v0.6.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling enum-iterator v0.6.0
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling tightness v1.0.1
[INFO] [stderr]    Compiling loadstone_config v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(bool_to_option)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `loadstone_config`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "9c70e9c0b81b4e2234c559c2a1c0439acd82d5edb2e14addc526b0b7c4d37aaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c70e9c0b81b4e2234c559c2a1c0439acd82d5edb2e14addc526b0b7c4d37aaa", kill_on_drop: false }`
[INFO] [stdout] 9c70e9c0b81b4e2234c559c2a1c0439acd82d5edb2e14addc526b0b7c4d37aaa
