[INFO] fetching crate derive_from_env 0.1.3...
[INFO] checking derive_from_env-0.1.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate derive_from_env 0.1.3 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate derive_from_env 0.1.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate derive_from_env 0.1.3
[INFO] tweaked toml for crates.io crate derive_from_env 0.1.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate derive_from_env 0.1.3 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 derive_from_env 0.1.3 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] 391c3416a8e4626b6053670d1bf89ffbebf224a0a74a7b1f36d1da2a7bd6dcec
[INFO] running `Command { std: "docker" "start" "-a" "391c3416a8e4626b6053670d1bf89ffbebf224a0a74a7b1f36d1da2a7bd6dcec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "391c3416a8e4626b6053670d1bf89ffbebf224a0a74a7b1f36d1da2a7bd6dcec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "391c3416a8e4626b6053670d1bf89ffbebf224a0a74a7b1f36d1da2a7bd6dcec", kill_on_drop: false }`
[INFO] [stdout] 391c3416a8e4626b6053670d1bf89ffbebf224a0a74a7b1f36d1da2a7bd6dcec
[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] fd24f9b40fbfa2d1e9615961aa223963d9426899fbbb24456680ef9edad7df70
[INFO] running `Command { std: "docker" "start" "-a" "fd24f9b40fbfa2d1e9615961aa223963d9426899fbbb24456680ef9edad7df70", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking temp-env v0.3.6
[INFO] [stderr]    Compiling darling_core v0.20.10
[INFO] [stderr]    Compiling darling_macro v0.20.10
[INFO] [stderr]    Compiling darling v0.20.10
[INFO] [stderr]    Compiling derive_from_env_proc v0.1.2
[INFO] [stderr]     Checking derive_from_env v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> tests/simple_tests.rs:10:28
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[derive(Debug, PartialEq, FromEnv)]
[INFO] [stdout]    |                            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `FromEnv` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> tests/simple_tests.rs:48:28
[INFO] [stdout]    |
[INFO] [stdout] 48 | #[derive(Debug, PartialEq, FromEnv)]
[INFO] [stdout]    |                            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `FromEnv` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> tests/simple_tests.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 | #[derive(Debug, PartialEq, FromEnv)]
[INFO] [stdout]    |                            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `FromEnv` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive_from_env` (test "simple_tests") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "fd24f9b40fbfa2d1e9615961aa223963d9426899fbbb24456680ef9edad7df70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd24f9b40fbfa2d1e9615961aa223963d9426899fbbb24456680ef9edad7df70", kill_on_drop: false }`
[INFO] [stdout] fd24f9b40fbfa2d1e9615961aa223963d9426899fbbb24456680ef9edad7df70