[INFO] cloning repository https://github.com/zeroclock/rust_tutorial_url
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zeroclock/rust_tutorial_url" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeroclock%2Frust_tutorial_url", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeroclock%2Frust_tutorial_url'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a21e0e05c229fdefb90557c4833c4fb2360a390e
[INFO] checking zeroclock/rust_tutorial_url against master#31be8cc41148983e742fea8f559aacca0f6647db for pr-116494-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeroclock%2Frust_tutorial_url" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zeroclock/rust_tutorial_url on toolchain 31be8cc41148983e742fea8f559aacca0f6647db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+31be8cc41148983e742fea8f559aacca0f6647db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zeroclock/rust_tutorial_url
[INFO] finished tweaking git repo https://github.com/zeroclock/rust_tutorial_url
[INFO] tweaked toml for git repo https://github.com/zeroclock/rust_tutorial_url written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zeroclock/rust_tutorial_url 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" "+31be8cc41148983e742fea8f559aacca0f6647db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thread_local v1.0.1
[INFO] [stderr]   Downloaded bitflags v1.2.1
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[INFO] [stderr]   Downloaded rustc-demangle v0.1.16
[INFO] [stderr]   Downloaded pretty_env_logger v0.2.5
[INFO] [stderr]   Downloaded failure_derive v0.1.8
[INFO] [stderr]   Downloaded cc v1.0.52
[INFO] [stderr]   Downloaded vec_map v0.8.1
[INFO] [stderr]   Downloaded syn v0.15.44
[INFO] [stderr]   Downloaded hermit-abi v0.1.12
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[INFO] [stderr]   Downloaded termcolor v1.1.0
[INFO] [stderr]   Downloaded time v0.1.43
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[INFO] [stderr]   Downloaded heck v0.3.1
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[INFO] [stderr]   Downloaded clap v2.33.0
[INFO] [stderr]   Downloaded syn v1.0.18
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[INFO] [stderr]   Downloaded strsim v0.8.0
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[INFO] [stderr]   Downloaded unicode-normalization v0.1.12
[INFO] [stderr]   Downloaded structopt v0.2.18
[INFO] [stderr]   Downloaded smallvec v1.4.0
[INFO] [stderr]   Downloaded textwrap v0.11.0
[INFO] [stderr]   Downloaded num-traits v0.2.11
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[INFO] [stderr]   Downloaded backtrace v0.3.46
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[INFO] [stderr]   Downloaded winapi-util v0.1.5
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[INFO] [stderr]   Downloaded autocfg v1.0.0
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[INFO] [stderr]   Downloaded libc v0.2.69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+31be8cc41148983e742fea8f559aacca0f6647db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] deee46313b505fb4ce3c3347f97fa57e2083b00e892482f58e02e66f3b1b25cf
[INFO] running `Command { std: "docker" "start" "-a" "deee46313b505fb4ce3c3347f97fa57e2083b00e892482f58e02e66f3b1b25cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "deee46313b505fb4ce3c3347f97fa57e2083b00e892482f58e02e66f3b1b25cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "deee46313b505fb4ce3c3347f97fa57e2083b00e892482f58e02e66f3b1b25cf", kill_on_drop: false }`
[INFO] [stdout] deee46313b505fb4ce3c3347f97fa57e2083b00e892482f58e02e66f3b1b25cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+31be8cc41148983e742fea8f559aacca0f6647db" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d96d67434d932722929b28c2ef840773f2807648f7875d924c801ab0c032d5b4
[INFO] running `Command { std: "docker" "start" "-a" "d96d67434d932722929b28c2ef840773f2807648f7875d924c801ab0c032d5b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking pretty_env_logger v0.2.5
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking url v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     handle.read_to_string(&mut buf);
[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] 31 |     let _ = handle.read_to_string(&mut buf);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Opt::clap().print_help();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let _ = Opt::clap().print_help();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     handle.read_to_string(&mut buf);
[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] 31 |     let _ = handle.read_to_string(&mut buf);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Opt::clap().print_help();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let _ = Opt::clap().print_help();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.83s
[INFO] running `Command { std: "docker" "inspect" "d96d67434d932722929b28c2ef840773f2807648f7875d924c801ab0c032d5b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d96d67434d932722929b28c2ef840773f2807648f7875d924c801ab0c032d5b4", kill_on_drop: false }`
[INFO] [stdout] d96d67434d932722929b28c2ef840773f2807648f7875d924c801ab0c032d5b4