[INFO] fetching crate exprz-core 0.0.6...
[INFO] checking exprz-core-0.0.6 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate exprz-core 0.0.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate exprz-core 0.0.6 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exprz-core 0.0.6
[INFO] finished tweaking crates.io crate exprz-core 0.0.6
[INFO] tweaked toml for crates.io crate exprz-core 0.0.6 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 209a1ac3ae7ddbee7deaebd22b8d39f7b0aa868206d1924ec6c040f2627ac4e9
[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" "209a1ac3ae7ddbee7deaebd22b8d39f7b0aa868206d1924ec6c040f2627ac4e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "209a1ac3ae7ddbee7deaebd22b8d39f7b0aa868206d1924ec6c040f2627ac4e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "209a1ac3ae7ddbee7deaebd22b8d39f7b0aa868206d1924ec6c040f2627ac4e9", kill_on_drop: false }`
[INFO] [stdout] 209a1ac3ae7ddbee7deaebd22b8d39f7b0aa868206d1924ec6c040f2627ac4e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0331946334d253c586695f5a1fa6bd0eafa02dc9cae86d69abdfe36d1e0ba840
[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" "0331946334d253c586695f5a1fa6bd0eafa02dc9cae86d69abdfe36d1e0ba840", kill_on_drop: false }`
[INFO] [stderr]     Checking exprz-core v0.0.6 (/opt/rustwide/workdir)
[INFO] [stdout] error: Missing required bounds on Iter
[INFO] [stdout]     --> src/lib.rs:1008:9
[INFO] [stdout]      |
[INFO] [stdout] 1008 | /         type Iter<'t>: Iterator<Item = Self::Item<'t>>
[INFO] [stdout] 1009 | |         where
[INFO] [stdout] 1010 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clauses: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Missing required bounds on IterGen
[INFO] [stdout]     --> src/lib.rs:1019:9
[INFO] [stdout]      |
[INFO] [stdout] 1019 | /         type IterGen<'t>: IteratorGen<T>
[INFO] [stdout] 1020 | |         where
[INFO] [stdout] 1021 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clauses: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exprz-core` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: Missing required bounds on Iter
[INFO] [stdout]     --> src/lib.rs:1008:9
[INFO] [stdout]      |
[INFO] [stdout] 1008 | /         type Iter<'t>: Iterator<Item = Self::Item<'t>>
[INFO] [stdout] 1009 | |         where
[INFO] [stdout] 1010 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clauses: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Missing required bounds on IterGen
[INFO] [stdout]     --> src/lib.rs:1019:9
[INFO] [stdout]      |
[INFO] [stdout] 1019 | /         type IterGen<'t>: IteratorGen<T>
[INFO] [stdout] 1020 | |         where
[INFO] [stdout] 1021 | |             T: 't;
[INFO] [stdout]      | |                  ^ help: add the required where clauses: `, Self: 't`
[INFO] [stdout]      | |__________________|
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0331946334d253c586695f5a1fa6bd0eafa02dc9cae86d69abdfe36d1e0ba840", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0331946334d253c586695f5a1fa6bd0eafa02dc9cae86d69abdfe36d1e0ba840", kill_on_drop: false }`
[INFO] [stdout] 0331946334d253c586695f5a1fa6bd0eafa02dc9cae86d69abdfe36d1e0ba840