[INFO] cloning repository https://github.com/wulymammoth/grass
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wulymammoth/grass" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwulymammoth%2Fgrass", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwulymammoth%2Fgrass'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e1677c1098cffa8f1a0bb066ea9cc75d5019fd1
[INFO] checking wulymammoth/grass against try#7df376b035b3d12ff0386ad8b45b76dbe020257b for pr-142712
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwulymammoth%2Fgrass" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wulymammoth/grass
[INFO] finished tweaking git repo https://github.com/wulymammoth/grass
[INFO] tweaked toml for git repo https://github.com/wulymammoth/grass written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wulymammoth/grass on toolchain 7df376b035b3d12ff0386ad8b45b76dbe020257b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wulymammoth/grass 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" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded structopt v0.3.20
[INFO] [stderr]   Downloaded assert_cmd v1.0.1
[INFO] [stderr]   Downloaded structopt-derive v0.4.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd6b6e5f09bd2b386268518b6df2efa7aa8765a3a70ecaf1146ca90aa333745e
[INFO] running `Command { std: "docker" "start" "-a" "bd6b6e5f09bd2b386268518b6df2efa7aa8765a3a70ecaf1146ca90aa333745e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd6b6e5f09bd2b386268518b6df2efa7aa8765a3a70ecaf1146ca90aa333745e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd6b6e5f09bd2b386268518b6df2efa7aa8765a3a70ecaf1146ca90aa333745e", kill_on_drop: false }`
[INFO] [stdout] bd6b6e5f09bd2b386268518b6df2efa7aa8765a3a70ecaf1146ca90aa333745e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f15965385928884678f4d333ca84f7a359bb04193d29d3affb6bf7ad85cf507
[INFO] running `Command { std: "docker" "start" "-a" "0f15965385928884678f4d333ca84f7a359bb04193d29d3affb6bf7ad85cf507", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking env_logger v0.8.1
[INFO] [stderr]     Checking predicates v1.0.5
[INFO] [stderr]     Checking assert_cmd v1.0.1
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]     Checking structopt v0.3.20
[INFO] [stderr]     Checking grass v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]  --> src/lib.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 |                 Err(err) => panic!(err),
[INFO] [stdout]   |                                    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]   = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]   |
[INFO] [stdout] 8 |                 Err(err) => panic!("{}", err),
[INFO] [stdout]   |                                    +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]   |
[INFO] [stdout] 8 -                 Err(err) => panic!(err),
[INFO] [stdout] 8 +                 Err(err) => std::panic::panic_any(err),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]  --> src/lib.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 |                 Err(err) => panic!(err),
[INFO] [stdout]   |                                    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]   = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]   |
[INFO] [stdout] 8 |                 Err(err) => panic!("{}", err),
[INFO] [stdout]   |                                    +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]   |
[INFO] [stdout] 8 -                 Err(err) => panic!(err),
[INFO] [stdout] 8 +                 Err(err) => std::panic::panic_any(err),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `Command { std: "docker" "inspect" "0f15965385928884678f4d333ca84f7a359bb04193d29d3affb6bf7ad85cf507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f15965385928884678f4d333ca84f7a359bb04193d29d3affb6bf7ad85cf507", kill_on_drop: false }`
[INFO] [stdout] 0f15965385928884678f4d333ca84f7a359bb04193d29d3affb6bf7ad85cf507