[INFO] fetching crate env-flags 0.1.1...
[INFO] checking env-flags-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate env-flags 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate env-flags 0.1.1
[INFO] finished tweaking crates.io crate env-flags 0.1.1
[INFO] tweaked toml for crates.io crate env-flags 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate env-flags 0.1.1 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 env-flags 0.1.1 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 9e5d556fbb7beac7aa7701137f670dba18a3b1fd63351c69db0bd793e3732977
[INFO] running `Command { std: "docker" "start" "-a" "9e5d556fbb7beac7aa7701137f670dba18a3b1fd63351c69db0bd793e3732977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e5d556fbb7beac7aa7701137f670dba18a3b1fd63351c69db0bd793e3732977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e5d556fbb7beac7aa7701137f670dba18a3b1fd63351c69db0bd793e3732977", kill_on_drop: false }`
[INFO] [stdout] 9e5d556fbb7beac7aa7701137f670dba18a3b1fd63351c69db0bd793e3732977
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 921ae29ab0eba4b7f641eef5f8370c7c48a7d6f1ec831fed40d1d9c50e049390
[INFO] running `Command { std: "docker" "start" "-a" "921ae29ab0eba4b7f641eef5f8370c7c48a7d6f1ec831fed40d1d9c50e049390", kill_on_drop: false }`
[INFO] [stderr]     Checking env-flags v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/lib.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 107 | /                 value
[INFO] [stdout] 108 | |                     .parse()
[INFO] [stdout]     | |____________________________^
[INFO] [stdout] ...
[INFO] [stdout] 132 |   gen_parse_env_using_fromstr!(PathBuf);
[INFO] [stdout]     |   ------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `gen_parse_env_using_fromstr` (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]    --> src/lib.rs:138:60
[INFO] [stdout]     |
[INFO] [stdout] 138 |       fn parse_env(value: String) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 139 | |         Ok(value)
[INFO] [stdout] 140 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/lib.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 |         Ok(value)
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&str, Infallible>
[INFO] [stdout]    --> src/lib.rs:146:60
[INFO] [stdout]     |
[INFO] [stdout] 146 |       fn parse_env(value: String) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 147 | |         Ok(Box::leak(Box::new(value)))
[INFO] [stdout] 148 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&str, Infallible>
[INFO] [stdout]    --> src/lib.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |         Ok(Box::leak(Box::new(value)))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `env-flags` (lib) due to 5 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<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/lib.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 107 | /                 value
[INFO] [stdout] 108 | |                     .parse()
[INFO] [stdout]     | |____________________________^
[INFO] [stdout] ...
[INFO] [stdout] 132 |   gen_parse_env_using_fromstr!(PathBuf);
[INFO] [stdout]     |   ------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `gen_parse_env_using_fromstr` (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]    --> src/lib.rs:138:60
[INFO] [stdout]     |
[INFO] [stdout] 138 |       fn parse_env(value: String) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 139 | |         Ok(value)
[INFO] [stdout] 140 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/lib.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 |         Ok(value)
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&str, Infallible>
[INFO] [stdout]    --> src/lib.rs:146:60
[INFO] [stdout]     |
[INFO] [stdout] 146 |       fn parse_env(value: String) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 147 | |         Ok(Box::leak(Box::new(value)))
[INFO] [stdout] 148 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&str, Infallible>
[INFO] [stdout]    --> src/lib.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |         Ok(Box::leak(Box::new(value)))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `env-flags` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "921ae29ab0eba4b7f641eef5f8370c7c48a7d6f1ec831fed40d1d9c50e049390", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "921ae29ab0eba4b7f641eef5f8370c7c48a7d6f1ec831fed40d1d9c50e049390", kill_on_drop: false }`
[INFO] [stdout] 921ae29ab0eba4b7f641eef5f8370c7c48a7d6f1ec831fed40d1d9c50e049390