[INFO] cloning repository https://github.com/gurry/lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gurry/lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgurry%2Flox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgurry%2Flox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9454694ffd0045ee6beb0ba189554dffa9d341af
[INFO] checking gurry/lox against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgurry%2Flox" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gurry/lox on toolchain 15e8bc6907ab2b3623cb52acc726f4787458df64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gurry/lox
[INFO] finished tweaking git repo https://github.com/gurry/lox
[INFO] tweaked toml for git repo https://github.com/gurry/lox written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gurry/lox 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" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e2fe6ab6bed6c8c5479ca72f176d572e13b5b42af3badbb17b0a1b0d94f50c4
[INFO] running `Command { std: "docker" "start" "-a" "2e2fe6ab6bed6c8c5479ca72f176d572e13b5b42af3badbb17b0a1b0d94f50c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e2fe6ab6bed6c8c5479ca72f176d572e13b5b42af3badbb17b0a1b0d94f50c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e2fe6ab6bed6c8c5479ca72f176d572e13b5b42af3badbb17b0a1b0d94f50c4", kill_on_drop: false }`
[INFO] [stdout] 2e2fe6ab6bed6c8c5479ca72f176d572e13b5b42af3badbb17b0a1b0d94f50c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94a1fd237a87977e012b21c223ab223d31010a5660208f10d8368b8a278f3176
[INFO] running `Command { std: "docker" "start" "-a" "94a1fd237a87977e012b21c223ab223d31010a5660208f10d8368b8a278f3176", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/instruction.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl InstructionWriter {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 51 |     pub fn new(chunk: Chunk) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Call` is never constructed
[INFO] [stdout]    --> src/compiler.rs:739:3
[INFO] [stdout]     |
[INFO] [stdout] 729 | enum Precedence {
[INFO] [stdout]     |      ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 739 |   Call,        // . ()
[INFO] [stdout]     |   ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Precedence` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/instruction.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl InstructionWriter {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 51 |     pub fn new(chunk: Chunk) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Call` is never constructed
[INFO] [stdout]    --> src/compiler.rs:739:3
[INFO] [stdout]     |
[INFO] [stdout] 729 | enum Precedence {
[INFO] [stdout]     |      ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 739 |   Call,        // . ()
[INFO] [stdout]     |   ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Precedence` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.71s
[INFO] running `Command { std: "docker" "inspect" "94a1fd237a87977e012b21c223ab223d31010a5660208f10d8368b8a278f3176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94a1fd237a87977e012b21c223ab223d31010a5660208f10d8368b8a278f3176", kill_on_drop: false }`
[INFO] [stdout] 94a1fd237a87977e012b21c223ab223d31010a5660208f10d8368b8a278f3176