[INFO] cloning repository https://github.com/bhjoellund/fibver [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bhjoellund/fibver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbhjoellund%2Ffibver", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbhjoellund%2Ffibver'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] e3927920dae762cd8c93a574d8901e5133efcf6a [INFO] testing bhjoellund/fibver against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbhjoellund%2Ffibver" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/bhjoellund/fibver on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/bhjoellund/fibver [INFO] finished tweaking git repo https://github.com/bhjoellund/fibver [INFO] tweaked toml for git repo https://github.com/bhjoellund/fibver written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/bhjoellund/fibver already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 69fae6e7d8caa4262ea88df86d6467158413b6cc9487d014eebef02f7ab68294 [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" "69fae6e7d8caa4262ea88df86d6467158413b6cc9487d014eebef02f7ab68294", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "69fae6e7d8caa4262ea88df86d6467158413b6cc9487d014eebef02f7ab68294", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "69fae6e7d8caa4262ea88df86d6467158413b6cc9487d014eebef02f7ab68294", kill_on_drop: false }` [INFO] [stdout] 69fae6e7d8caa4262ea88df86d6467158413b6cc9487d014eebef02f7ab68294 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 05df43f366bf3d20c114990a247b88237e4206359d95db4e10979db8936f4768 [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" "05df43f366bf3d20c114990a247b88237e4206359d95db4e10979db8936f4768", kill_on_drop: false }` [INFO] [stderr] Compiling lazy_static v1.3.0 [INFO] [stderr] Compiling regex v1.1.9 [INFO] [stderr] Compiling ucd-util v0.1.3 [INFO] [stderr] Compiling utf8-ranges v1.0.3 [INFO] [stderr] Compiling aho-corasick v0.7.4 [INFO] [stderr] Compiling thread_local v0.3.6 [INFO] [stderr] Compiling regex-syntax v0.6.8 [INFO] [stderr] Compiling fibver v1.1.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a function that returns `Result` [INFO] [stdout] --> src/args.rs:13:45 [INFO] [stdout] | [INFO] [stdout] 12 | / fn parse_version(version: &str) -> Result { [INFO] [stdout] 13 | | let captures = VERSION.captures(version)?; [INFO] [stdout] | | ^ use `.ok_or(...)?` to provide an error compatible with `Result` [INFO] [stdout] 14 | | let major: i32 = (&captures["major"]).parse().unwrap(); [INFO] [stdout] 15 | | let minor: i32 = (&captures["minor"]).parse().unwrap(); [INFO] [stdout] ... | [INFO] [stdout] 22 | | }) [INFO] [stdout] 23 | | } [INFO] [stdout] | |_- this function returns a `Result` [INFO] [stdout] | [INFO] [stdout] = help: the trait `FromResidual>` is not implemented for `Result` [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] [stderr] error: could not compile `fibver` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "05df43f366bf3d20c114990a247b88237e4206359d95db4e10979db8936f4768", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "05df43f366bf3d20c114990a247b88237e4206359d95db4e10979db8936f4768", kill_on_drop: false }` [INFO] [stdout] 05df43f366bf3d20c114990a247b88237e4206359d95db4e10979db8936f4768