[INFO] fetching crate grdf 0.7.3...
[INFO] testing grdf-0.7.3 against 1.60.0 for beta-1.61-1
[INFO] extracting crate grdf 0.7.3 into /workspace/builds/worker-59/source
[INFO] validating manifest of crates.io crate grdf 0.7.3 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate grdf 0.7.3
[INFO] finished tweaking crates.io crate grdf 0.7.3
[INFO] tweaked toml for crates.io crate grdf 0.7.3 written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded iref v2.1.2
[INFO] [stderr]   Downloaded langtag v0.2.0
[INFO] [stderr]   Downloaded pct-str v1.1.0
[INFO] [stderr]   Downloaded static-iref v1.0.0
[INFO] [stderr]   Downloaded rdf-types v0.4.1
[INFO] [stderr]   Downloaded iref v1.4.3
[INFO] [stderr]   Downloaded locspan v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94b5a4cdaf0cb8c759b5b1793835aeb5ffa65ae9553bcdc18ff091fcc33b374c
[INFO] running `Command { std: "docker" "start" "-a" "94b5a4cdaf0cb8c759b5b1793835aeb5ffa65ae9553bcdc18ff091fcc33b374c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94b5a4cdaf0cb8c759b5b1793835aeb5ffa65ae9553bcdc18ff091fcc33b374c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94b5a4cdaf0cb8c759b5b1793835aeb5ffa65ae9553bcdc18ff091fcc33b374c", kill_on_drop: false }`
[INFO] [stdout] 94b5a4cdaf0cb8c759b5b1793835aeb5ffa65ae9553bcdc18ff091fcc33b374c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0e0c83bd27d7319399043b7ac7deb3fc513fc86dc9a6be3f676edfc236c61c4
[INFO] running `Command { std: "docker" "start" "-a" "b0e0c83bd27d7319399043b7ac7deb3fc513fc86dc9a6be3f676edfc236c61c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling pct-str v1.1.0
[INFO] [stderr]    Compiling langtag v0.2.0
[INFO] [stderr]    Compiling iref v2.1.2
[INFO] [stderr]    Compiling rdf-types v0.4.1
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling grdf v0.7.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:100:1
[INFO] [stdout]     |
[INFO] [stdout] 100 | #![feature(generic_associated_types)]
[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 `grdf` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b0e0c83bd27d7319399043b7ac7deb3fc513fc86dc9a6be3f676edfc236c61c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0e0c83bd27d7319399043b7ac7deb3fc513fc86dc9a6be3f676edfc236c61c4", kill_on_drop: false }`
[INFO] [stdout] b0e0c83bd27d7319399043b7ac7deb3fc513fc86dc9a6be3f676edfc236c61c4