[INFO] fetching crate mdup 0.0.1...
[INFO] checking mdup-0.0.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mdup 0.0.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate mdup 0.0.1
[INFO] finished tweaking crates.io crate mdup 0.0.1
[INFO] tweaked toml for crates.io crate mdup 0.0.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdup 0.0.1 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 mdup 0.0.1 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] 3aa8907d8cc51e23f23e43257a586d8592262fb25461bcdd0bc92c1fb96444f1
[INFO] running `Command { std: "docker" "start" "-a" "3aa8907d8cc51e23f23e43257a586d8592262fb25461bcdd0bc92c1fb96444f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3aa8907d8cc51e23f23e43257a586d8592262fb25461bcdd0bc92c1fb96444f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa8907d8cc51e23f23e43257a586d8592262fb25461bcdd0bc92c1fb96444f1", kill_on_drop: false }`
[INFO] [stdout] 3aa8907d8cc51e23f23e43257a586d8592262fb25461bcdd0bc92c1fb96444f1
[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] 7f3789587891b70a2fe50670104b7d87799ed083949a34e94c5a7e6819d31833
[INFO] running `Command { std: "docker" "start" "-a" "7f3789587891b70a2fe50670104b7d87799ed083949a34e94c5a7e6819d31833", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]    Compiling pulldown-cmark v0.9.1
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.14
[INFO] [stderr]     Checking clap v3.0.14
[INFO] [stderr]     Checking mdup v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         dir: Option<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<String, Infallible>
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | /         #[clap(short, long)]
[INFO] [stdout] 19 | |         output: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         dir: Option<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<String, Infallible>
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | /         #[clap(short, long)]
[INFO] [stdout] 19 | |         output: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdup` (bin "mdup") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `mdup` (bin "mdup" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7f3789587891b70a2fe50670104b7d87799ed083949a34e94c5a7e6819d31833", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f3789587891b70a2fe50670104b7d87799ed083949a34e94c5a7e6819d31833", kill_on_drop: false }`
[INFO] [stdout] 7f3789587891b70a2fe50670104b7d87799ed083949a34e94c5a7e6819d31833