[INFO] cloning repository https://github.com/lowr/my-gzip
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lowr/my-gzip" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowr%2Fmy-gzip", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowr%2Fmy-gzip'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 50c6be38f5c69df1e5d5d53b7f0c9b3b93dd5f8e
[INFO] checking lowr/my-gzip against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowr%2Fmy-gzip" "/workspace/builds/worker-30/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-30/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lowr/my-gzip 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 git repo https://github.com/lowr/my-gzip
[INFO] finished tweaking git repo https://github.com/lowr/my-gzip
[INFO] tweaked toml for git repo https://github.com/lowr/my-gzip written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate git repo https://github.com/lowr/my-gzip already has a lockfile, it will not be regenerated
[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-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] d7f18545e5ef3fa96990efd2efec31104300882db2434672d2b62e2c7c660d2f
[INFO] running `Command { std: "docker" "start" "-a" "d7f18545e5ef3fa96990efd2efec31104300882db2434672d2b62e2c7c660d2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7f18545e5ef3fa96990efd2efec31104300882db2434672d2b62e2c7c660d2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7f18545e5ef3fa96990efd2efec31104300882db2434672d2b62e2c7c660d2f", kill_on_drop: false }`
[INFO] [stdout] d7f18545e5ef3fa96990efd2efec31104300882db2434672d2b62e2c7c660d2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] a3335d24ccf17b024f408715092683d83413521374ef62123413c08e7480ca36
[INFO] running `Command { std: "docker" "start" "-a" "a3335d24ccf17b024f408715092683d83413521374ef62123413c08e7480ca36", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking my-gzip v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/tree.rs:98:19
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub(crate) fn size(&self) -> usize {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]    --> src/tree.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub(crate) fn size(&self) -> usize {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/decompress/huffman.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |                 prev.insert(b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/decompress/huffman.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 prev.insert(0);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/tree.rs:98:19
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub(crate) fn size(&self) -> usize {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]    --> src/tree.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub(crate) fn size(&self) -> usize {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/decompress/huffman.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |                 prev.insert(b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/decompress/huffman.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 prev.insert(0);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.68s
[INFO] running `Command { std: "docker" "inspect" "a3335d24ccf17b024f408715092683d83413521374ef62123413c08e7480ca36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3335d24ccf17b024f408715092683d83413521374ef62123413c08e7480ca36", kill_on_drop: false }`
[INFO] [stdout] a3335d24ccf17b024f408715092683d83413521374ef62123413c08e7480ca36