[INFO] fetching crate grdf 0.2.0-beta...
[INFO] testing grdf-0.2.0-beta against 1.49.0 for beta-1.50-1
[INFO] extracting crate grdf 0.2.0-beta into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate grdf 0.2.0-beta on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate grdf 0.2.0-beta
[INFO] finished tweaking crates.io crate grdf 0.2.0-beta
[INFO] tweaked toml for crates.io crate grdf 0.2.0-beta written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7b683eb62add81872aafac646df889779fc511ab46199d9e2ccf61c04c8d5ea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e7b683eb62add81872aafac646df889779fc511ab46199d9e2ccf61c04c8d5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7b683eb62add81872aafac646df889779fc511ab46199d9e2ccf61c04c8d5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7b683eb62add81872aafac646df889779fc511ab46199d9e2ccf61c04c8d5ea", kill_on_drop: false }`
[INFO] [stdout] e7b683eb62add81872aafac646df889779fc511ab46199d9e2ccf61c04c8d5ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4d59af514b633d45f087c9d5d3f61560c880ae37835efaace5fd9f3e8a665f0a
[INFO] running `Command { std: "docker" "start" "-a" "4d59af514b633d45f087c9d5d3f61560c880ae37835efaace5fd9f3e8a665f0a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pct-str v1.1.0
[INFO] [stderr]    Compiling ordered-float v1.1.1
[INFO] [stderr]    Compiling iref v1.4.3
[INFO] [stderr]    Compiling grdf v0.2.0-beta (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:96:1
[INFO] [stdout]    |
[INFO] [stdout] 96 | #![feature(generic_associated_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `generic_associated_types` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | #![feature(generic_associated_types)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #44265 <https://github.com/rust-lang/rust/issues/44265> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0309]: the parameter type `T` may not live long enough
[INFO] [stdout]    --> src/lib.rs:256:28
[INFO] [stdout]     |
[INFO] [stdout] 249 | pub trait Dataset<T = crate::Term> {
[INFO] [stdout]     |                   - help: consider adding an explicit lifetime bound...: `T: 'a`
[INFO] [stdout] ...
[INFO] [stdout] 256 |     type Graphs<'a>: Iterator<Item = (Option<&'a T>, &'a Self::Graph)>;
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the reference type `&'a T` does not outlive the data it points at
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0309]: the associated type `<Self as Dataset<T>>::Graph` may not live long enough
[INFO] [stdout]    --> src/lib.rs:256:28
[INFO] [stdout]     |
[INFO] [stdout] 256 |     type Graphs<'a>: Iterator<Item = (Option<&'a T>, &'a Self::Graph)>;
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding an explicit lifetime bound `<Self as Dataset<T>>::Graph: 'a`...
[INFO] [stdout]     = note: ...so that the reference type `&'a <Self as Dataset<T>>::Graph` does not outlive the data it points at
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0309]: the parameter type `T` may not live long enough
[INFO] [stdout]    --> src/lib.rs:259:27
[INFO] [stdout]     |
[INFO] [stdout] 249 | pub trait Dataset<T = crate::Term> {
[INFO] [stdout]     |                   - help: consider adding an explicit lifetime bound...: `T: 'a`
[INFO] [stdout] ...
[INFO] [stdout] 259 |     type Quads<'a>: Iterator<Item = Quad<&'a T>>;
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^ ...so that the reference type `&'a T` does not outlive the data it points at
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0309]: the parameter type `T` may not live long enough
[INFO] [stdout]    --> src/lib.rs:382:31
[INFO] [stdout]     |
[INFO] [stdout] 380 | pub trait MutableDataset<T = crate::Term>: Dataset<T> {
[INFO] [stdout]     |                          - help: consider adding an explicit lifetime bound...: `T: 'a`
[INFO] [stdout] 381 |     /// Iterator over mutable graphs.
[INFO] [stdout] 382 |     type GraphsMut<'a>: Iterator<Item = (Option<&'a T>, &'a mut Self::Graph)>;
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the reference type `&'a T` does not outlive the data it points at
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0309]: the associated type `<Self as Dataset<T>>::Graph` may not live long enough
[INFO] [stdout]    --> src/lib.rs:382:31
[INFO] [stdout]     |
[INFO] [stdout] 382 |     type GraphsMut<'a>: Iterator<Item = (Option<&'a T>, &'a mut Self::Graph)>;
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding an explicit lifetime bound `<Self as Dataset<T>>::Graph: 'a`...
[INFO] [stdout]     = note: ...so that the reference type `&'a mut <Self as Dataset<T>>::Graph` does not outlive the data it points at
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0309, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0309`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grdf`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "4d59af514b633d45f087c9d5d3f61560c880ae37835efaace5fd9f3e8a665f0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d59af514b633d45f087c9d5d3f61560c880ae37835efaace5fd9f3e8a665f0a", kill_on_drop: false }`
[INFO] [stdout] 4d59af514b633d45f087c9d5d3f61560c880ae37835efaace5fd9f3e8a665f0a