[INFO] cloning repository https://github.com/cm-kazup0n/omc [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cm-kazup0n/omc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcm-kazup0n%2Fomc", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcm-kazup0n%2Fomc'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 464205d5204b5c69ef850c7a7ab13ad92d8937f2 [INFO] checking cm-kazup0n/omc against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcm-kazup0n%2Fomc" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/cm-kazup0n/omc on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/cm-kazup0n/omc [INFO] finished tweaking git repo https://github.com/cm-kazup0n/omc [INFO] tweaked toml for git repo https://github.com/cm-kazup0n/omc written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/cm-kazup0n/omc already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b79360e4ab0835f09efdd82b2581f16dcdb4d02031d87342709c091a2f7fef36 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "b79360e4ab0835f09efdd82b2581f16dcdb4d02031d87342709c091a2f7fef36", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b79360e4ab0835f09efdd82b2581f16dcdb4d02031d87342709c091a2f7fef36", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b79360e4ab0835f09efdd82b2581f16dcdb4d02031d87342709c091a2f7fef36", kill_on_drop: false }` [INFO] [stdout] b79360e4ab0835f09efdd82b2581f16dcdb4d02031d87342709c091a2f7fef36 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6ae2ff537a3bb4753df03108d7430197b76d4823af101c9a9c4401a2157d621f [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "6ae2ff537a3bb4753df03108d7430197b76d4823af101c9a9c4401a2157d621f", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Checking unicode-width v0.1.8 [INFO] [stderr] Checking vec_map v0.8.2 [INFO] [stderr] Checking toml v0.5.8 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking clap v2.33.3 [INFO] [stderr] Checking opc v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0277]: the `?` operator can only be used on `Option`s, not `Result`s, in a method that returns `Option` [INFO] [stdout] --> src/cache.rs:32:53 [INFO] [stdout] | [INFO] [stdout] 31 | / pub fn restore_cache(&self) -> Option { [INFO] [stdout] 32 | | let mut buf = Ok(BufReader::new(&self.file))?; [INFO] [stdout] | | ^ use `.ok()?` if you want to discard the `Result` error information [INFO] [stdout] 33 | | let mut line = String::new(); [INFO] [stdout] 34 | | buf.read_line(&mut line).ok()?; [INFO] [stdout] ... | [INFO] [stdout] 41 | | }; [INFO] [stdout] 42 | | } [INFO] [stdout] | |_____- this function returns an `Option` [INFO] [stdout] | [INFO] [stdout] = help: the trait `FromResidual>` is not implemented for `std::option::Option` [INFO] [stdout] = note: required by `from_residual` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used on `Option`s, not `Result`s, in a method that returns `Option` [INFO] [stdout] --> src/cache.rs:32:53 [INFO] [stdout] | [INFO] [stdout] 31 | / pub fn restore_cache(&self) -> Option { [INFO] [stdout] 32 | | let mut buf = Ok(BufReader::new(&self.file))?; [INFO] [stdout] | | ^ use `.ok()?` if you want to discard the `Result` error information [INFO] [stdout] 33 | | let mut line = String::new(); [INFO] [stdout] 34 | | buf.read_line(&mut line).ok()?; [INFO] [stdout] ... | [INFO] [stdout] 41 | | }; [INFO] [stdout] 42 | | } [INFO] [stdout] | |_____- this function returns an `Option` [INFO] [stdout] | [INFO] [stdout] = help: the trait `FromResidual>` is not implemented for `std::option::Option` [INFO] [stdout] = note: required by `from_residual` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `opc` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "6ae2ff537a3bb4753df03108d7430197b76d4823af101c9a9c4401a2157d621f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6ae2ff537a3bb4753df03108d7430197b76d4823af101c9a9c4401a2157d621f", kill_on_drop: false }` [INFO] [stdout] 6ae2ff537a3bb4753df03108d7430197b76d4823af101c9a9c4401a2157d621f