[INFO] cloning repository https://github.com/chunghha/ron-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chunghha/ron-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchunghha%2Fron-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchunghha%2Fron-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 948237ecb06c4bf8d9b6dd8f4e22a1acbab2a950
[INFO] checking chunghha/ron-demo against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchunghha%2Fron-demo" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chunghha/ron-demo on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chunghha/ron-demo
[INFO] finished tweaking git repo https://github.com/chunghha/ron-demo
[INFO] tweaked toml for git repo https://github.com/chunghha/ron-demo written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/chunghha/ron-demo 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded plotlib v0.5.1
[INFO] [stderr]   Downloaded ron v0.6.0
[INFO] [stderr]   Downloaded console v0.9.2
[INFO] [stderr]   Downloaded svg v0.7.2
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded termios v0.3.2
[INFO] [stderr]   Downloaded serde v1.0.111
[INFO] [stderr]   Downloaded base64 v0.12.1
[INFO] [stderr]   Downloaded better-panic v0.2.0
[INFO] [stderr]   Downloaded serde_derive v1.0.111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bdc18c347a1ea650e073bed439dfb0aa009b60f04d3bcf8280211ff0fc1a82f2
[INFO] running `Command { std: "docker" "start" "-a" "bdc18c347a1ea650e073bed439dfb0aa009b60f04d3bcf8280211ff0fc1a82f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdc18c347a1ea650e073bed439dfb0aa009b60f04d3bcf8280211ff0fc1a82f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdc18c347a1ea650e073bed439dfb0aa009b60f04d3bcf8280211ff0fc1a82f2", kill_on_drop: false }`
[INFO] [stdout] bdc18c347a1ea650e073bed439dfb0aa009b60f04d3bcf8280211ff0fc1a82f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e84d4aa9d431b3f722525856f09f156a14ca3c42f3521daba89bc9c952451264
[INFO] running `Command { std: "docker" "start" "-a" "e84d4aa9d431b3f722525856f09f156a14ca3c42f3521daba89bc9c952451264", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking object v0.19.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking base64 v0.12.1
[INFO] [stderr]     Checking svg v0.7.2
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termios v0.3.2
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking addr2line v0.12.1
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking console v0.9.2
[INFO] [stderr]     Checking better-panic v0.2.0
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking plotlib v0.5.1
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking ron v0.6.0
[INFO] [stderr]     Checking ron-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `boolean`, `float`, `map`, `nested`, and `tuple` are never read
[INFO] [stdout]   --> src/bin/decode.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Config {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 11 |   boolean: bool,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout] 12 |   float: f32,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 13 |   map: HashMap<u8, char>,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 14 |   nested: Nested,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 15 |   tuple: (u32, u32),
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/bin/decode.rs:20:3
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Nested {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 20 |   a: String,
[INFO] [stdout]    |   ^
[INFO] [stdout] 21 |   b: char,
[INFO] [stdout]    |   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Nested` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `boolean`, `float`, `map`, `nested`, and `tuple` are never read
[INFO] [stdout]   --> src/bin/decode.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Config {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 11 |   boolean: bool,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout] 12 |   float: f32,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 13 |   map: HashMap<u8, char>,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 14 |   nested: Nested,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 15 |   tuple: (u32, u32),
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/bin/decode.rs:20:3
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Nested {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 20 |   a: String,
[INFO] [stdout]    |   ^
[INFO] [stdout] 21 |   b: char,
[INFO] [stdout]    |   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Nested` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.02s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: svg v0.7.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "e84d4aa9d431b3f722525856f09f156a14ca3c42f3521daba89bc9c952451264", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e84d4aa9d431b3f722525856f09f156a14ca3c42f3521daba89bc9c952451264", kill_on_drop: false }`
[INFO] [stdout] e84d4aa9d431b3f722525856f09f156a14ca3c42f3521daba89bc9c952451264