[INFO] fetching crate melorun 0.3.4...
[INFO] checking melorun-0.3.4 against try#0c46a61b05fb97ea2e031df461bcb1436e3c5bc3 for pr-98456-1
[INFO] extracting crate melorun 0.3.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate melorun 0.3.4 on toolchain 0c46a61b05fb97ea2e031df461bcb1436e3c5bc3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0c46a61b05fb97ea2e031df461bcb1436e3c5bc3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate melorun 0.3.4
[INFO] finished tweaking crates.io crate melorun 0.3.4
[INFO] tweaked toml for crates.io crate melorun 0.3.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate melorun 0.3.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0c46a61b05fb97ea2e031df461bcb1436e3c5bc3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 8c31882a23e9ce31abc4964b97c0e534560c01a9565223e25994764678951d77
[INFO] running `Command { std: "docker" "start" "-a" "8c31882a23e9ce31abc4964b97c0e534560c01a9565223e25994764678951d77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c31882a23e9ce31abc4964b97c0e534560c01a9565223e25994764678951d77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c31882a23e9ce31abc4964b97c0e534560c01a9565223e25994764678951d77", kill_on_drop: false }`
[INFO] [stdout] 8c31882a23e9ce31abc4964b97c0e534560c01a9565223e25994764678951d77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+0c46a61b05fb97ea2e031df461bcb1436e3c5bc3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d6fbe0bafa0a258eac72272022640369fe32950b3026414ce7e8ae20646f53e
[INFO] running `Command { std: "docker" "start" "-a" "7d6fbe0bafa0a258eac72272022640369fe32950b3026414ce7e8ae20646f53e", kill_on_drop: false }`
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[INFO] [stderr]     Checking melorun v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `melo_str`
[INFO] [stdout]   --> src/runner.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let melo_str = std::fs::read_to_string(path).map_err(LoadFileError::IoError)?;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_melo_str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/runner.rs:46:37
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn run_repl_line(&mut self, line: &str) -> Result<Option<melvm::Value>, ReplError> {
[INFO] [stdout]    |                                     ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `melo_str`
[INFO] [stdout]   --> src/runner.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let melo_str = std::fs::read_to_string(path).map_err(LoadFileError::IoError)?;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_melo_str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/runner.rs:46:37
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn run_repl_line(&mut self, line: &str) -> Result<Option<melvm::Value>, ReplError> {
[INFO] [stdout]    |                                     ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `src_contents` and `src_path` are never read
[INFO] [stdout]   --> src/runner.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Runner {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 7  |     /// Contents of a valid Melodeon program.
[INFO] [stdout] 8  |     src_contents: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 9  |     /// Path to that valid Melodeon program.
[INFO] [stdout] 10 |     src_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `src_contents` and `src_path` are never read
[INFO] [stdout]   --> src/runner.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Runner {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 7  |     /// Contents of a valid Melodeon program.
[INFO] [stdout] 8  |     src_contents: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 9  |     /// Path to that valid Melodeon program.
[INFO] [stdout] 10 |     src_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `Command { std: "docker" "inspect" "7d6fbe0bafa0a258eac72272022640369fe32950b3026414ce7e8ae20646f53e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d6fbe0bafa0a258eac72272022640369fe32950b3026414ce7e8ae20646f53e", kill_on_drop: false }`
[INFO] [stdout] 7d6fbe0bafa0a258eac72272022640369fe32950b3026414ce7e8ae20646f53e