[INFO] fetching crate mdbook-trace 0.1.1...
[INFO] checking mdbook-trace-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mdbook-trace 0.1.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate mdbook-trace 0.1.1
[INFO] finished tweaking crates.io crate mdbook-trace 0.1.1
[INFO] tweaked toml for crates.io crate mdbook-trace 0.1.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook-trace 0.1.1 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 mdbook-trace 0.1.1 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 4adb68a6412ff6ba5b6831d40f769e11e73323983e6c86fb0a328988d4bde386
[INFO] running `Command { std: "docker" "start" "-a" "4adb68a6412ff6ba5b6831d40f769e11e73323983e6c86fb0a328988d4bde386", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4adb68a6412ff6ba5b6831d40f769e11e73323983e6c86fb0a328988d4bde386", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4adb68a6412ff6ba5b6831d40f769e11e73323983e6c86fb0a328988d4bde386", kill_on_drop: false }`
[INFO] [stdout] 4adb68a6412ff6ba5b6831d40f769e11e73323983e6c86fb0a328988d4bde386
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1f7a77e58eadedc9a27a63df0547fc4ce571ece6608c4f77f1cb7a8ca83e283d
[INFO] running `Command { std: "docker" "start" "-a" "1f7a77e58eadedc9a27a63df0547fc4ce571ece6608c4f77f1cb7a8ca83e283d", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.143
[INFO] [stderr]    Compiling thiserror v1.0.32
[INFO] [stderr]    Compiling ucd-trie v0.1.4
[INFO] [stderr]    Compiling serde v1.0.143
[INFO] [stderr]    Compiling once_cell v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling serde_json v1.0.83
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling anyhow v1.0.62
[INFO] [stderr]    Compiling pest v2.2.1
[INFO] [stderr]    Compiling pulldown-cmark v0.9.2
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking clap v3.2.17
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling semver v1.0.13
[INFO] [stderr]     Checking iana-time-zone v0.1.45
[INFO] [stderr]     Checking chrono v0.4.22
[INFO] [stderr]     Checking opener v0.5.0
[INFO] [stderr]     Checking topological-sort v0.1.0
[INFO] [stderr]     Checking shlex v1.1.0
[INFO] [stderr]    Compiling pest_meta v2.2.1
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking clap_complete v3.2.4
[INFO] [stderr]    Compiling pest_generator v2.2.1
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]    Compiling pest_derive v2.2.1
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking handlebars v4.3.3
[INFO] [stderr]     Checking mdbook v0.4.21
[INFO] [stderr]     Checking mdbook-trace v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Supports { renderer: 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/main.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Supports { renderer: String },
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdbook-trace` (bin "mdbook-trace") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `mdbook-trace` (bin "mdbook-trace" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1f7a77e58eadedc9a27a63df0547fc4ce571ece6608c4f77f1cb7a8ca83e283d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f7a77e58eadedc9a27a63df0547fc4ce571ece6608c4f77f1cb7a8ca83e283d", kill_on_drop: false }`
[INFO] [stdout] 1f7a77e58eadedc9a27a63df0547fc4ce571ece6608c4f77f1cb7a8ca83e283d
