[INFO] fetching crate rust_stringz 1.0.0...
[INFO] checking rust_stringz-1.0.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate rust_stringz 1.0.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate rust_stringz 1.0.0
[INFO] finished tweaking crates.io crate rust_stringz 1.0.0
[INFO] tweaked toml for crates.io crate rust_stringz 1.0.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_stringz 1.0.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c9980e668f19d9a0e29ba8a74294cfa2dd1567ef91fa402a1433644c587dd8a
[INFO] running `Command { std: "docker" "start" "-a" "2c9980e668f19d9a0e29ba8a74294cfa2dd1567ef91fa402a1433644c587dd8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c9980e668f19d9a0e29ba8a74294cfa2dd1567ef91fa402a1433644c587dd8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c9980e668f19d9a0e29ba8a74294cfa2dd1567ef91fa402a1433644c587dd8a", kill_on_drop: false }`
[INFO] [stdout] 2c9980e668f19d9a0e29ba8a74294cfa2dd1567ef91fa402a1433644c587dd8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8272d2e94ec4467ec9b82b779076f56485ee4b6fa53d6209a761dafb893bc405
[INFO] running `Command { std: "docker" "start" "-a" "8272d2e94ec4467ec9b82b779076f56485ee4b6fa53d6209a761dafb893bc405", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_stringz v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::count_occurrences`
[INFO] [stdout]   --> src/count_occurrences.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use super::count_occurrences;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::is_palindrome`
[INFO] [stdout]   --> src/is_palindrome.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     use super::is_palindrome;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::to_lowercase`
[INFO] [stdout]  --> src/to_lowercase.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use super::to_lowercase;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::to_uppercase`
[INFO] [stdout]  --> src/to_uppercase.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use super::to_uppercase;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "8272d2e94ec4467ec9b82b779076f56485ee4b6fa53d6209a761dafb893bc405", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8272d2e94ec4467ec9b82b779076f56485ee4b6fa53d6209a761dafb893bc405", kill_on_drop: false }`
[INFO] [stdout] 8272d2e94ec4467ec9b82b779076f56485ee4b6fa53d6209a761dafb893bc405