[INFO] cloning repository https://github.com/vinikira/iron_api_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vinikira/iron_api_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvinikira%2Firon_api_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvinikira%2Firon_api_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 812145e74f96e7b6847ee8d4d045d8490293f3b4
[INFO] checking vinikira/iron_api_test against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvinikira%2Firon_api_test" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vinikira/iron_api_test 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/vinikira/iron_api_test
[INFO] finished tweaking git repo https://github.com/vinikira/iron_api_test
[INFO] tweaked toml for git repo https://github.com/vinikira/iron_api_test written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/vinikira/iron_api_test 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]      Locking 1 package
[INFO] [stderr]       Adding iron_api_test v0.1.0 (/workspace/builds/worker-6-tc1/source)
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_syscall v0.1.44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 7ed22b87a7a49510fd0d3a4f1ee16e5ac8b2205babd24ae61399dbc42f7c6af8
[INFO] running `Command { std: "docker" "start" "-a" "7ed22b87a7a49510fd0d3a4f1ee16e5ac8b2205babd24ae61399dbc42f7c6af8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ed22b87a7a49510fd0d3a4f1ee16e5ac8b2205babd24ae61399dbc42f7c6af8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ed22b87a7a49510fd0d3a4f1ee16e5ac8b2205babd24ae61399dbc42f7c6af8", kill_on_drop: false }`
[INFO] [stdout] 7ed22b87a7a49510fd0d3a4f1ee16e5ac8b2205babd24ae61399dbc42f7c6af8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] cc433773e39fc4826ca759b3d08270a591eb5bd59cf798fd5bafcfbc1b213920
[INFO] running `Command { std: "docker" "start" "-a" "cc433773e39fc4826ca759b3d08270a591eb5bd59cf798fd5bafcfbc1b213920", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking safemem v0.3.0
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stderr]     Checking time v0.1.41
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling mime_guess v1.8.6
[INFO] [stderr]     Checking hyper v0.10.15
[INFO] [stderr]     Checking iron v0.6.0
[INFO] [stderr]     Checking iron_api_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     Iron::new(chain).http("0.0.0.0:3000")
[INFO] [stdout] 14 | |         .map(|_| println!("listening on http://localhost:3000"))
[INFO] [stdout] 15 | |         .map_err(|_| {
[INFO] [stdout] 16 | |             println!("error")
[INFO] [stdout] 17 | |         });
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = Iron::new(chain).http("0.0.0.0:3000")
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     Iron::new(chain).http("0.0.0.0:3000")
[INFO] [stdout] 14 | |         .map(|_| println!("listening on http://localhost:3000"))
[INFO] [stdout] 15 | |         .map_err(|_| {
[INFO] [stdout] 16 | |             println!("error")
[INFO] [stdout] 17 | |         });
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = Iron::new(chain).http("0.0.0.0:3000")
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.75s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: traitobject v0.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 6`
[INFO] running `Command { std: "docker" "inspect" "cc433773e39fc4826ca759b3d08270a591eb5bd59cf798fd5bafcfbc1b213920", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc433773e39fc4826ca759b3d08270a591eb5bd59cf798fd5bafcfbc1b213920", kill_on_drop: false }`
[INFO] [stdout] cc433773e39fc4826ca759b3d08270a591eb5bd59cf798fd5bafcfbc1b213920