[INFO] fetching crate exprz 0.0.15...
[INFO] testing exprz-0.0.15 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate exprz 0.0.15 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate exprz 0.0.15 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exprz 0.0.15
[INFO] finished tweaking crates.io crate exprz 0.0.15
[INFO] tweaked toml for crates.io crate exprz 0.0.15 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6a9219a910f180950f59ee0364fe8b5b4ecabd104d1c1980003f2b4ad3ae029
[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" "e6a9219a910f180950f59ee0364fe8b5b4ecabd104d1c1980003f2b4ad3ae029", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6a9219a910f180950f59ee0364fe8b5b4ecabd104d1c1980003f2b4ad3ae029", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a9219a910f180950f59ee0364fe8b5b4ecabd104d1c1980003f2b4ad3ae029", kill_on_drop: false }`
[INFO] [stdout] e6a9219a910f180950f59ee0364fe8b5b4ecabd104d1c1980003f2b4ad3ae029
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1e97a66b1260171b8c9d28fc9e23d705d61280a89f89fcb2f19b60f67db68b7
[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" "b1e97a66b1260171b8c9d28fc9e23d705d61280a89f89fcb2f19b60f67db68b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling exprz v0.0.15 (/opt/rustwide/workdir)
[INFO] [stdout] error: Missing required bounds on Item
[INFO] [stdout]    --> src/lib.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 | /     type Item<'e>: Reference<'e, E>
[INFO] [stdout] 157 | |     where
[INFO] [stdout] 158 | |         E: 'e;
[INFO] [stdout]     | |              ^ help: add the required where clauses: `, Self: 'e`
[INFO] [stdout]     | |______________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Missing required bounds on Iter
[INFO] [stdout]    --> src/lib.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 | /     type Iter<'e>: Iterator<Item = Self::Item<'e>>
[INFO] [stdout] 162 | |     where
[INFO] [stdout] 163 | |         E: 'e;
[INFO] [stdout]     | |              ^ help: add the required where clauses: `, Self: 'e`
[INFO] [stdout]     | |______________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Missing required bounds on Ref
[INFO] [stdout]    --> src/lib.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 262 | /     type Ref<'e>: GroupReference<E>
[INFO] [stdout] 263 | |     where
[INFO] [stdout] 264 | |         E: 'e;
[INFO] [stdout]     | |              ^ help: add the required where clauses: `, Self: 'e`
[INFO] [stdout]     | |______________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exprz` due to 4 previous errors
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b1e97a66b1260171b8c9d28fc9e23d705d61280a89f89fcb2f19b60f67db68b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1e97a66b1260171b8c9d28fc9e23d705d61280a89f89fcb2f19b60f67db68b7", kill_on_drop: false }`
[INFO] [stdout] b1e97a66b1260171b8c9d28fc9e23d705d61280a89f89fcb2f19b60f67db68b7