[INFO] cloning repository https://github.com/maemon4095/regen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maemon4095/regen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaemon4095%2Fregen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaemon4095%2Fregen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26f8afcc64e331f834d181bc7c33408fb37b1c6b
[INFO] checking maemon4095/regen 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%2Fmaemon4095%2Fregen" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/maemon4095/regen
[INFO] finished tweaking git repo https://github.com/maemon4095/regen
[INFO] tweaked toml for git repo https://github.com/maemon4095/regen written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/maemon4095/regen 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/maemon4095/regen 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8d7f71c01431fadbdba7bdfcb27781ad2f594cf30b423c81ebe0ddfca6f9d1a2
[INFO] running `Command { std: "docker" "start" "-a" "8d7f71c01431fadbdba7bdfcb27781ad2f594cf30b423c81ebe0ddfca6f9d1a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d7f71c01431fadbdba7bdfcb27781ad2f594cf30b423c81ebe0ddfca6f9d1a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d7f71c01431fadbdba7bdfcb27781ad2f594cf30b423c81ebe0ddfca6f9d1a2", kill_on_drop: false }`
[INFO] [stdout] 8d7f71c01431fadbdba7bdfcb27781ad2f594cf30b423c81ebe0ddfca6f9d1a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4542c5119ac5e8648fcffacc3c104675b427f8d84e6bc45d636269461e1eac08
[INFO] running `Command { std: "docker" "start" "-a" "4542c5119ac5e8648fcffacc3c104675b427f8d84e6bc45d636269461e1eac08", kill_on_drop: false }`
[INFO] [stderr]     Checking regen-core v0.0.0 (/opt/rustwide/workdir/crates/regen-core)
[INFO] [stderr]    Compiling prettyplease v0.2.35
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking regen-macro-impl v0.0.0 (/opt/rustwide/workdir/crates/regen-macro-impl)
[INFO] [stdout] error: this type will no longer be must used: Result<String, NeverError>
[INFO] [stdout]   --> crates/regen-core/src/from_char_seq/string_builder.rs:23:56
[INFO] [stdout]    |
[INFO] [stdout] 23 |       fn build(&self) -> Result<Self::Type, Self::Error> {
[INFO] [stdout]    |  ________________________________________________________^
[INFO] [stdout] 24 | |         Ok(self.buf.clone())
[INFO] [stdout] 25 | |     }
[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<String, NeverError>
[INFO] [stdout]   --> crates/regen-core/src/from_char_seq/string_builder.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Ok(self.buf.clone())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regen-core` (lib) 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<String, NeverError>
[INFO] [stdout]   --> crates/regen-core/src/from_char_seq/string_builder.rs:23:56
[INFO] [stdout]    |
[INFO] [stdout] 23 |       fn build(&self) -> Result<Self::Type, Self::Error> {
[INFO] [stdout]    |  ________________________________________________________^
[INFO] [stdout] 24 | |         Ok(self.buf.clone())
[INFO] [stdout] 25 | |     }
[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<String, NeverError>
[INFO] [stdout]   --> crates/regen-core/src/from_char_seq/string_builder.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Ok(self.buf.clone())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regen-core` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4542c5119ac5e8648fcffacc3c104675b427f8d84e6bc45d636269461e1eac08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4542c5119ac5e8648fcffacc3c104675b427f8d84e6bc45d636269461e1eac08", kill_on_drop: false }`
[INFO] [stdout] 4542c5119ac5e8648fcffacc3c104675b427f8d84e6bc45d636269461e1eac08
