[INFO] cloning repository https://github.com/frendsick/stak-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frendsick/stak-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrendsick%2Fstak-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrendsick%2Fstak-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 41218f42f6a82843fb89d4b660a387d19c02ce50
[INFO] checking frendsick/stak-lang against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrendsick%2Fstak-lang" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/frendsick/stak-lang
[INFO] finished tweaking git repo https://github.com/frendsick/stak-lang
[INFO] tweaked toml for git repo https://github.com/frendsick/stak-lang written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/frendsick/stak-lang 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 git repo https://github.com/frendsick/stak-lang 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-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] fbceb6019c73dca631f2ea57faefe301b9fc95f4c642d8585e01d053e7cbac81
[INFO] running `Command { std: "docker" "start" "-a" "fbceb6019c73dca631f2ea57faefe301b9fc95f4c642d8585e01d053e7cbac81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbceb6019c73dca631f2ea57faefe301b9fc95f4c642d8585e01d053e7cbac81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbceb6019c73dca631f2ea57faefe301b9fc95f4c642d8585e01d053e7cbac81", kill_on_drop: false }`
[INFO] [stdout] fbceb6019c73dca631f2ea57faefe301b9fc95f4c642d8585e01d053e7cbac81
[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] 19ac73684ea9a59aaca98644e225c147b231ed1d8b6c5c78eb80d1a697b8be74
[INFO] running `Command { std: "docker" "start" "-a" "19ac73684ea9a59aaca98644e225c147b231ed1d8b6c5c78eb80d1a697b8be74", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling rustversion v1.0.20
[INFO] [stderr]    Compiling clap_derive v4.5.41
[INFO] [stderr]     Checking clap_builder v4.5.41
[INFO] [stderr]     Checking hashbrown v0.15.3
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]     Checking strum v0.27.1
[INFO] [stderr]     Checking indexmap v2.9.0
[INFO] [stderr]    Compiling strum_macros v0.27.1
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling phf_macros v0.11.3
[INFO] [stderr]     Checking phf v0.11.3
[INFO] [stderr]     Checking clap v4.5.41
[INFO] [stderr]     Checking casac v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<TypeNode, !>
[INFO] [stdout]    --> src/type_check.rs:499:20
[INFO] [stdout]     |
[INFO] [stdout] 499 |           let node = type_stack.pop_type(&param.ty).map_err(|error| {
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 500 | |             let error_metadata = format!(
[INFO] [stdout] 501 | |                 "Signature: {}
[INFO] [stdout] ...   |
[INFO] [stdout] 539 | |         });
[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<TypeNode, !>
[INFO] [stdout]    --> src/type_check.rs:499:20
[INFO] [stdout]     |
[INFO] [stdout] 499 |           let node = type_stack.pop_type(&param.ty).map_err(|error| {
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 500 | |             let error_metadata = format!(
[INFO] [stdout] 501 | |                 "Signature: {}
[INFO] [stdout] ...   |
[INFO] [stdout] 539 | |         });
[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 `casac` (bin "casac") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `casac` (bin "casac" test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "19ac73684ea9a59aaca98644e225c147b231ed1d8b6c5c78eb80d1a697b8be74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19ac73684ea9a59aaca98644e225c147b231ed1d8b6c5c78eb80d1a697b8be74", kill_on_drop: false }`
[INFO] [stdout] 19ac73684ea9a59aaca98644e225c147b231ed1d8b6c5c78eb80d1a697b8be74
