[INFO] cloning repository https://github.com/ggujjula/compression_examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ggujjula/compression_examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggujjula%2Fcompression_examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggujjula%2Fcompression_examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 82a912a4cec25d6fb2c2f1598f8ab8cb1850a9eb
[INFO] checking ggujjula/compression_examples against try#3a4cb0edb4040379c037e06efeb5409e44be7b77 for pr-146377
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggujjula%2Fcompression_examples" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ggujjula/compression_examples
[INFO] finished tweaking git repo https://github.com/ggujjula/compression_examples
[INFO] tweaked toml for git repo https://github.com/ggujjula/compression_examples written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ggujjula/compression_examples on toolchain 3a4cb0edb4040379c037e06efeb5409e44be7b77
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ggujjula/compression_examples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2dfea19a2845e1e7ba4e3f7a63c5c317ad8b1654a30bf65f900a9fb3309c1699
[INFO] running `Command { std: "docker" "start" "-a" "2dfea19a2845e1e7ba4e3f7a63c5c317ad8b1654a30bf65f900a9fb3309c1699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2dfea19a2845e1e7ba4e3f7a63c5c317ad8b1654a30bf65f900a9fb3309c1699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dfea19a2845e1e7ba4e3f7a63c5c317ad8b1654a30bf65f900a9fb3309c1699", kill_on_drop: false }`
[INFO] [stdout] 2dfea19a2845e1e7ba4e3f7a63c5c317ad8b1654a30bf65f900a9fb3309c1699
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fb012d25cfe0d188ed97147536656bf19704b99d868e87cc7188b83d5356743
[INFO] running `Command { std: "docker" "start" "-a" "5fb012d25cfe0d188ed97147536656bf19704b99d868e87cc7188b83d5356743", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rmp v0.8.14
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking rand v0.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking rmp-serde v1.3.0
[INFO] [stderr]     Checking compression_examples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]  --> src/lz77.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn compress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]   |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]  --> src/lz77.rs:7:35
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn compress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]   |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]   --> src/lz77.rs:11:19
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn decompress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/lz77.rs:11:37
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn decompress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]    |                                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/huffman.rs:179:43
[INFO] [stdout]     |
[INFO] [stdout] 179 |         let retval = HuffmanTreeNode::new(v);
[INFO] [stdout]     |                      -------------------- ^ expected `&CharFrequencies<_>`, found `Vec<u8>`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&CharFrequencies<_>`
[INFO] [stdout]                   found struct `Vec<u8>`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/huffman.rs:37:8
[INFO] [stdout]     |
[INFO] [stdout]  37 |     fn new(freq: &CharFrequencies<T>) -> Self {
[INFO] [stdout]     |        ^^^ -------------------------
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/huffman.rs:188:43
[INFO] [stdout]     |
[INFO] [stdout] 188 |         let retval = HuffmanTreeNode::new(v);
[INFO] [stdout]     |                      -------------------- ^ expected `&CharFrequencies<_>`, found `Vec<u8>`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&CharFrequencies<_>`
[INFO] [stdout]                   found struct `Vec<u8>`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/huffman.rs:37:8
[INFO] [stdout]     |
[INFO] [stdout]  37 |     fn new(freq: &CharFrequencies<T>) -> Self {
[INFO] [stdout]     |        ^^^ -------------------------
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]  --> src/lz77.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn compress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]   |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]  --> src/lz77.rs:7:35
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn compress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]   |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]   --> src/lz77.rs:11:19
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn decompress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/lz77.rs:11:37
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn decompress(input: impl Read, output: impl Write) -> IoResult<()> {
[INFO] [stdout]    |                                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compression_examples` (lib test) due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5fb012d25cfe0d188ed97147536656bf19704b99d868e87cc7188b83d5356743", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb012d25cfe0d188ed97147536656bf19704b99d868e87cc7188b83d5356743", kill_on_drop: false }`
[INFO] [stdout] 5fb012d25cfe0d188ed97147536656bf19704b99d868e87cc7188b83d5356743
