[INFO] fetching crate qp-trie 0.8.1...
[INFO] checking qp-trie-0.8.1 against master#e4106065bf1bb515935d5d024e8d9c86454e2b22 for pr-112160
[INFO] extracting crate qp-trie 0.8.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate qp-trie 0.8.1 on toolchain e4106065bf1bb515935d5d024e8d9c86454e2b22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate qp-trie 0.8.1
[INFO] finished tweaking crates.io crate qp-trie 0.8.1
[INFO] tweaked toml for crates.io crate qp-trie 0.8.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded qptrie v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 855d3166380398fff2027c76d042ec129a30417ff0eaff0c9aab3ae56f009d0d
[INFO] running `Command { std: "docker" "start" "-a" "855d3166380398fff2027c76d042ec129a30417ff0eaff0c9aab3ae56f009d0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "855d3166380398fff2027c76d042ec129a30417ff0eaff0c9aab3ae56f009d0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "855d3166380398fff2027c76d042ec129a30417ff0eaff0c9aab3ae56f009d0d", kill_on_drop: false }`
[INFO] [stdout] 855d3166380398fff2027c76d042ec129a30417ff0eaff0c9aab3ae56f009d0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d42358aeb80cacf280802a189998665fc65799133aaf7afc9baf22e58ffa1c6
[INFO] running `Command { std: "docker" "start" "-a" "8d42358aeb80cacf280802a189998665fc65799133aaf7afc9baf22e58ffa1c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.145
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking debug_unreachable v0.1.1
[INFO] [stderr]     Checking qp-trie v0.8.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking qptrie v0.2.4
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&K` instead of borrowing the inner type
[INFO] [stdout]   --> src/iter.rs:62:53
[INFO] [stdout]    |
[INFO] [stdout] 62 |             Some(Node::Leaf(leaf)) => Some((leaf.key.borrow(), &leaf.val)),
[INFO] [stdout]    |                                                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&K` instead of borrowing the inner type
[INFO] [stdout]   --> src/iter.rs:95:66
[INFO] [stdout]    |
[INFO] [stdout] 95 |             Some(&mut Node::Leaf(ref mut leaf)) => Some((leaf.key.borrow(), &mut leaf.val)),
[INFO] [stdout]    |                                                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&K` instead of borrowing the inner type
[INFO] [stdout]    --> src/iter.rs:128:52
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Some(Node::Leaf(leaf)) => Some(leaf.key.borrow()),
[INFO] [stdout]     |                                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]     Checking serde_json v1.0.96
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&K` instead of borrowing the inner type
[INFO] [stdout]   --> src/iter.rs:62:53
[INFO] [stdout]    |
[INFO] [stdout] 62 |             Some(Node::Leaf(leaf)) => Some((leaf.key.borrow(), &leaf.val)),
[INFO] [stdout]    |                                                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&K` instead of borrowing the inner type
[INFO] [stdout]   --> src/iter.rs:95:66
[INFO] [stdout]    |
[INFO] [stdout] 95 |             Some(&mut Node::Leaf(ref mut leaf)) => Some((leaf.key.borrow(), &mut leaf.val)),
[INFO] [stdout]    |                                                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&K` instead of borrowing the inner type
[INFO] [stdout]    --> src/iter.rs:128:52
[INFO] [stdout]     |
[INFO] [stdout] 128 |             Some(Node::Leaf(leaf)) => Some(leaf.key.borrow()),
[INFO] [stdout]     |                                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.78s
[INFO] running `Command { std: "docker" "inspect" "8d42358aeb80cacf280802a189998665fc65799133aaf7afc9baf22e58ffa1c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d42358aeb80cacf280802a189998665fc65799133aaf7afc9baf22e58ffa1c6", kill_on_drop: false }`
[INFO] [stdout] 8d42358aeb80cacf280802a189998665fc65799133aaf7afc9baf22e58ffa1c6