[INFO] fetching crate snail-countdown 1.1.0...
[INFO] checking snail-countdown-1.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate snail-countdown 1.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate snail-countdown 1.1.0
[INFO] finished tweaking crates.io crate snail-countdown 1.1.0
[INFO] tweaked toml for crates.io crate snail-countdown 1.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate snail-countdown 1.1.0 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 snail-countdown 1.1.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 8074f3f7ed6f4c121392130fda8e0fd9b5c74df584d0b3faf599544a55ea9211
[INFO] running `Command { std: "docker" "start" "-a" "8074f3f7ed6f4c121392130fda8e0fd9b5c74df584d0b3faf599544a55ea9211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8074f3f7ed6f4c121392130fda8e0fd9b5c74df584d0b3faf599544a55ea9211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8074f3f7ed6f4c121392130fda8e0fd9b5c74df584d0b3faf599544a55ea9211", kill_on_drop: false }`
[INFO] [stdout] 8074f3f7ed6f4c121392130fda8e0fd9b5c74df584d0b3faf599544a55ea9211
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d19bf358741d11b12727fc4c7d970b0e74227b8319b4a818e9459dfa311ea2a1
[INFO] running `Command { std: "docker" "start" "-a" "d19bf358741d11b12727fc4c7d970b0e74227b8319b4a818e9459dfa311ea2a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling serde v1.0.138
[INFO] [stderr]    Compiling serde_derive v1.0.138
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking cache-padded v1.2.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking event-listener v2.5.2
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]     Checking tracing-core v0.1.28
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking async-task v4.3.0
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking easy-parallel v3.2.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking ordered-stream v0.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking async-lock v2.5.0
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]     Checking os_str_bytes v6.1.0
[INFO] [stderr]     Checking sha1 v0.6.1
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking polling v2.2.0
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking indexmap v1.9.1
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking async-io v1.7.0
[INFO] [stderr]     Checking async-broadcast v0.4.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling enumflags2_derive v0.7.4
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling serde_repr v0.1.8
[INFO] [stderr]    Compiling async-recursion v0.3.2
[INFO] [stderr]    Compiling clap_derive v3.2.7
[INFO] [stderr]    Compiling thiserror v1.0.31
[INFO] [stderr]    Compiling proc-macro-crate v1.1.3
[INFO] [stderr]     Checking tracing v0.1.35
[INFO] [stderr]    Compiling zvariant_derive v3.4.1
[INFO] [stderr]    Compiling zbus_macros v2.3.2
[INFO] [stderr]     Checking clap v3.2.8
[INFO] [stderr]     Checking enumflags2 v0.7.5
[INFO] [stderr]     Checking zvariant v3.4.1
[INFO] [stderr]     Checking zbus_names v2.1.0
[INFO] [stderr]     Checking zbus v2.3.2
[INFO] [stderr]     Checking notify-rust v4.5.8
[INFO] [stderr]     Checking snail-countdown v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     text: 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 `snail-countdown` (bin "snail-countdown") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     text: 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 `snail-countdown` (bin "snail-countdown" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "d19bf358741d11b12727fc4c7d970b0e74227b8319b4a818e9459dfa311ea2a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d19bf358741d11b12727fc4c7d970b0e74227b8319b4a818e9459dfa311ea2a1", kill_on_drop: false }`
[INFO] [stdout] d19bf358741d11b12727fc4c7d970b0e74227b8319b4a818e9459dfa311ea2a1