[INFO] fetching crate ustr 1.1.0...
[INFO] checking ustr-1.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate ustr 1.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate ustr 1.1.0
[INFO] finished tweaking crates.io crate ustr 1.1.0
[INFO] tweaked toml for crates.io crate ustr 1.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ustr 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 90 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.4.0 (available: v0.7.0)
[INFO] [stderr]       Adding string-interner v0.13.0 (available: v0.19.0)
[INFO] [stderr]       Adding string_cache v0.8.9 (available: v0.9.0)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2ed111544e04166acff8a1c66999879589f7f5e9e1f6fe518bdf78fbd60210f3
[INFO] running `Command { std: "docker" "start" "-a" "2ed111544e04166acff8a1c66999879589f7f5e9e1f6fe518bdf78fbd60210f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ed111544e04166acff8a1c66999879589f7f5e9e1f6fe518bdf78fbd60210f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ed111544e04166acff8a1c66999879589f7f5e9e1f6fe518bdf78fbd60210f3", kill_on_drop: false }`
[INFO] [stdout] 2ed111544e04166acff8a1c66999879589f7f5e9e1f6fe518bdf78fbd60210f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e39e33f710d37b62e3a1b5abcba23f68eb4f2da4466bcd1ba25853cf65d83ed0
[INFO] running `Command { std: "docker" "start" "-a" "e39e33f710d37b62e3a1b5abcba23f68eb4f2da4466bcd1ba25853cf65d83ed0", kill_on_drop: false }`
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling zerocopy-derive v0.8.27
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking serde_json v1.0.145
[INFO] [stderr]     Checking ahash v0.7.8
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking textwrap v0.16.2
[INFO] [stderr]     Checking rayon v1.11.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.15
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking regex v1.12.2
[INFO] [stderr]     Checking half v2.7.1
[INFO] [stderr]     Checking ahash v0.8.12
[INFO] [stderr]     Checking ustr v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stdout] error: this type will no longer be must used: Result<Ustr, Infallible>
[INFO] [stdout]    --> src/lib.rs:515:53
[INFO] [stdout]     |
[INFO] [stdout] 515 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  _____________________________________________________^
[INFO] [stdout] 516 | |         Ok(Ustr::from(s))
[INFO] [stdout] 517 | |     }
[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<Ustr, Infallible>
[INFO] [stdout]    --> src/lib.rs:516:9
[INFO] [stdout]     |
[INFO] [stdout] 516 |         Ok(Ustr::from(s))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ustr` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e39e33f710d37b62e3a1b5abcba23f68eb4f2da4466bcd1ba25853cf65d83ed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e39e33f710d37b62e3a1b5abcba23f68eb4f2da4466bcd1ba25853cf65d83ed0", kill_on_drop: false }`
[INFO] [stdout] e39e33f710d37b62e3a1b5abcba23f68eb4f2da4466bcd1ba25853cf65d83ed0
