[INFO] cloning repository https://github.com/alanretgue/lambda-compiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alanretgue/lambda-compiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falanretgue%2Flambda-compiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falanretgue%2Flambda-compiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6823a17085c3db3ad25d8ebd194e9fab345b2dba
[INFO] checking alanretgue/lambda-compiler 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%2Falanretgue%2Flambda-compiler" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/alanretgue/lambda-compiler
[INFO] finished tweaking git repo https://github.com/alanretgue/lambda-compiler
[INFO] tweaked toml for git repo https://github.com/alanretgue/lambda-compiler written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/alanretgue/lambda-compiler 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 84 packages to latest compatible versions
[INFO] [stderr]       Adding lalrpop v0.19.12 (available: v0.22.2)
[INFO] [stderr]       Adding lalrpop-util v0.19.12 (available: v0.22.2)
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 08ca948cb4f2b70e424803152e148fb6edeaddc6db451a9affa5b324a93bad3a
[INFO] running `Command { std: "docker" "start" "-a" "08ca948cb4f2b70e424803152e148fb6edeaddc6db451a9affa5b324a93bad3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08ca948cb4f2b70e424803152e148fb6edeaddc6db451a9affa5b324a93bad3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08ca948cb4f2b70e424803152e148fb6edeaddc6db451a9affa5b324a93bad3a", kill_on_drop: false }`
[INFO] [stdout] 08ca948cb4f2b70e424803152e148fb6edeaddc6db451a9affa5b324a93bad3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 932b653b395d822df0962cfd643a228a4f12d767981759423d02e4fd7edf41fb
[INFO] running `Command { std: "docker" "start" "-a" "932b653b395d822df0962cfd643a228a4f12d767981759423d02e4fd7edf41fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling petgraph v0.6.5
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.2
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling lalrpop-util v0.19.12
[INFO] [stderr]     Checking anstyle-query v1.1.4
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]     Checking regex-syntax v0.8.8
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling ena v0.14.3
[INFO] [stderr]     Checking anstream v0.6.21
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking clap_builder v4.5.51
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling is-terminal v0.4.17
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling string_cache v0.8.9
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]    Compiling ascii-canvas v3.0.0
[INFO] [stderr]    Compiling lalrpop v0.19.12
[INFO] [stderr]     Checking regex v1.12.2
[INFO] [stderr]    Compiling clap_derive v4.5.49
[INFO] [stderr]     Checking clap v4.5.51
[INFO] [stderr]    Compiling toy-compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `launchers::launch_binding`
[INFO] [stdout]  --> src/binding.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{ast, launchers::launch_binding};
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/toy-compiler-cce957d9d8512c4f/out/parser.rs:1722:5
[INFO] [stdout]      |
[INFO] [stdout] 1722 |     String::from_str(s).unwrap()
[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]     --> /opt/rustwide/target/debug/build/toy-compiler-cce957d9d8512c4f/out/parser.rs:1722:5
[INFO] [stdout]      |
[INFO] [stdout] 1722 |     String::from_str(s).unwrap()
[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 `toy-compiler` (bin "toy-compiler" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `toy-compiler` (bin "toy-compiler") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "932b653b395d822df0962cfd643a228a4f12d767981759423d02e4fd7edf41fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "932b653b395d822df0962cfd643a228a4f12d767981759423d02e4fd7edf41fb", kill_on_drop: false }`
[INFO] [stdout] 932b653b395d822df0962cfd643a228a4f12d767981759423d02e4fd7edf41fb