[INFO] fetching crate espresso 0.0.1...
[INFO] checking espresso-0.0.1 against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] extracting crate espresso 0.0.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate espresso 0.0.1 on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate espresso 0.0.1
[INFO] finished tweaking crates.io crate espresso 0.0.1
[INFO] tweaked toml for crates.io crate espresso 0.0.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9d23c271e2f41df24f169d810d5da33fd982b72643c884c8d32c1f05a21c4c5
[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" "d9d23c271e2f41df24f169d810d5da33fd982b72643c884c8d32c1f05a21c4c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9d23c271e2f41df24f169d810d5da33fd982b72643c884c8d32c1f05a21c4c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9d23c271e2f41df24f169d810d5da33fd982b72643c884c8d32c1f05a21c4c5", kill_on_drop: false }`
[INFO] [stdout] d9d23c271e2f41df24f169d810d5da33fd982b72643c884c8d32c1f05a21c4c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be8f641b2d8381f180d265900bf2fce0cc986f6269262f4e631e2f0c532046dd
[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" "be8f641b2d8381f180d265900bf2fce0cc986f6269262f4e631e2f0c532046dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking ron v0.5.1
[INFO] [stderr]     Checking espresso v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/buf_ext.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/class.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefCell`, `Ref`
[INFO] [stdout]  --> src/class.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cell::{RefCell, Ref};
[INFO] [stdout]   |                 ^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/buf_ext.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/class.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefCell`, `Ref`
[INFO] [stdout]  --> src/class.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cell::{RefCell, Ref};
[INFO] [stdout]   |                 ^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ValueTooLarge`
[INFO] [stdout]   --> src/buf_ext.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     ValueTooLarge,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ValueTooLarge`
[INFO] [stdout]   --> src/buf_ext.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     ValueTooLarge,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `Command { std: "docker" "inspect" "be8f641b2d8381f180d265900bf2fce0cc986f6269262f4e631e2f0c532046dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be8f641b2d8381f180d265900bf2fce0cc986f6269262f4e631e2f0c532046dd", kill_on_drop: false }`
[INFO] [stdout] be8f641b2d8381f180d265900bf2fce0cc986f6269262f4e631e2f0c532046dd