[INFO] fetching crate guarding 0.2.6...
[INFO] checking guarding-0.2.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate guarding 0.2.6 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate guarding 0.2.6
[INFO] finished tweaking crates.io crate guarding 0.2.6
[INFO] tweaked toml for crates.io crate guarding 0.2.6 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate guarding 0.2.6 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate guarding 0.2.6 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e53a3d6f15383fc0c266b090332e75cd86b2fe0e1ff5f480c25f725561fbe63
[INFO] running `Command { std: "docker" "start" "-a" "6e53a3d6f15383fc0c266b090332e75cd86b2fe0e1ff5f480c25f725561fbe63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e53a3d6f15383fc0c266b090332e75cd86b2fe0e1ff5f480c25f725561fbe63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e53a3d6f15383fc0c266b090332e75cd86b2fe0e1ff5f480c25f725561fbe63", kill_on_drop: false }`
[INFO] [stdout] 6e53a3d6f15383fc0c266b090332e75cd86b2fe0e1ff5f480c25f725561fbe63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69e06264df27e984e381023c15712e061b5ad13371d1641c5ab19c200bf08e14
[INFO] running `Command { std: "docker" "start" "-a" "69e06264df27e984e381023c15712e061b5ad13371d1641c5ab19c200bf08e14", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking os_str_bytes v2.4.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling tree-sitter v0.19.3
[INFO] [stderr]    Compiling tree-sitter-java v0.19.0
[INFO] [stderr]    Compiling tree-sitter-javascript v0.19.0
[INFO] [stderr]    Compiling tree-sitter-rust v0.19.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking guarding_parser v0.2.6
[INFO] [stderr]     Checking guarding_core v0.2.6
[INFO] [stderr]     Checking guarding_ident v0.2.6
[INFO] [stderr]     Checking guarding v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/guarding.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     #[clap(short, long, default_value = "guarding.guarding")]
[INFO] [stdout] 12 | |     config: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/guarding.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     #[clap(short, long, default_value = "src")]
[INFO] [stdout] 15 | |     path: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/guarding.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     #[clap(short, long, default_value = "guard.json")]
[INFO] [stdout] 18 | |     output: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/guarding.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     #[clap(short, long, default_value = "guarding.guarding")]
[INFO] [stdout] 12 | |     config: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/guarding.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     #[clap(short, long, default_value = "src")]
[INFO] [stdout] 15 | |     path: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/bin/guarding.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     #[clap(short, long, default_value = "guard.json")]
[INFO] [stdout] 18 | |     output: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `guarding` (bin "guarding") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `guarding` (bin "guarding" test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "69e06264df27e984e381023c15712e061b5ad13371d1641c5ab19c200bf08e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69e06264df27e984e381023c15712e061b5ad13371d1641c5ab19c200bf08e14", kill_on_drop: false }`
[INFO] [stdout] 69e06264df27e984e381023c15712e061b5ad13371d1641c5ab19c200bf08e14