[INFO] fetching crate hexpr 0.1.0...
[INFO] checking hexpr-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate hexpr 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate hexpr 0.1.0
[INFO] finished tweaking crates.io crate hexpr 0.1.0
[INFO] tweaked toml for crates.io crate hexpr 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate hexpr 0.1.0 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 hexpr 0.1.0 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] [stderr]     Blocking waiting for file lock on package cache
[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] 6be3551b07e4418a3ec557482b9986fd1c12ed9db81ad0f257bae8141d9ea556
[INFO] running `Command { std: "docker" "start" "-a" "6be3551b07e4418a3ec557482b9986fd1c12ed9db81ad0f257bae8141d9ea556", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6be3551b07e4418a3ec557482b9986fd1c12ed9db81ad0f257bae8141d9ea556", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6be3551b07e4418a3ec557482b9986fd1c12ed9db81ad0f257bae8141d9ea556", kill_on_drop: false }`
[INFO] [stdout] 6be3551b07e4418a3ec557482b9986fd1c12ed9db81ad0f257bae8141d9ea556
[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] aff411ed0e6639f16577222dfeb7f5e354a894815ee67f034d36bcf1f6007944
[INFO] running `Command { std: "docker" "start" "-a" "aff411ed0e6639f16577222dfeb7f5e354a894815ee67f034d36bcf1f6007944", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror v2.0.14
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]     Checking dot-structures v0.1.2
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling syn v2.0.105
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking open-hypergraphs v0.2.4
[INFO] [stderr]     Checking into-attr v0.1.1
[INFO] [stderr]     Checking dot-generator v0.2.0
[INFO] [stderr]     Checking open-hypergraphs-dot v0.2.1
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling into-attr-derive v0.2.1
[INFO] [stderr]    Compiling thiserror-impl v2.0.14
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking tempfile v3.20.0
[INFO] [stderr]     Checking pest v2.8.1
[INFO] [stderr]    Compiling pest_meta v2.8.1
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]    Compiling pest_generator v2.8.1
[INFO] [stderr]    Compiling pest_derive v2.8.1
[INFO] [stderr]     Checking graphviz-rust v0.9.5
[INFO] [stderr]     Checking serde_json v1.0.142
[INFO] [stderr]     Checking hexpr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<ast::Variable, Infallible>
[INFO] [stdout]   --> src/ast.rs:20:53
[INFO] [stdout]    |
[INFO] [stdout] 20 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 21 | |         Ok(Variable::Named(s.to_string()))
[INFO] [stdout] 22 | |     }
[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<ast::Variable, Infallible>
[INFO] [stdout]   --> src/ast.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         Ok(Variable::Named(s.to_string()))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hexpr` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<Variable, Infallible>
[INFO] [stdout]   --> src/ast.rs:20:53
[INFO] [stdout]    |
[INFO] [stdout] 20 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 21 | |         Ok(Variable::Named(s.to_string()))
[INFO] [stdout] 22 | |     }
[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<Variable, Infallible>
[INFO] [stdout]   --> src/ast.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         Ok(Variable::Named(s.to_string()))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hexpr` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "aff411ed0e6639f16577222dfeb7f5e354a894815ee67f034d36bcf1f6007944", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aff411ed0e6639f16577222dfeb7f5e354a894815ee67f034d36bcf1f6007944", kill_on_drop: false }`
[INFO] [stdout] aff411ed0e6639f16577222dfeb7f5e354a894815ee67f034d36bcf1f6007944