[INFO] cloning repository https://github.com/ottiker/flow_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ottiker/flow_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fottiker%2Fflow_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fottiker%2Fflow_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66f431feebb31ca3d86be857430a5b9e963855d6
[INFO] checking ottiker/flow_rust against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fottiker%2Fflow_rust" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ottiker/flow_rust on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ottiker/flow_rust
[INFO] removed path dependency flow from git repo https://github.com/ottiker/flow_rust
[INFO] finished tweaking git repo https://github.com/ottiker/flow_rust
[INFO] tweaked toml for git repo https://github.com/ottiker/flow_rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/ottiker/flow_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (flow) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (flow) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 557c6b949c50f19af1f8c00735636ca58e75dc0a44dd13c6935ea973455d175d
[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" "557c6b949c50f19af1f8c00735636ca58e75dc0a44dd13c6935ea973455d175d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "557c6b949c50f19af1f8c00735636ca58e75dc0a44dd13c6935ea973455d175d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "557c6b949c50f19af1f8c00735636ca58e75dc0a44dd13c6935ea973455d175d", kill_on_drop: false }`
[INFO] [stdout] 557c6b949c50f19af1f8c00735636ca58e75dc0a44dd13c6935ea973455d175d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa7810021f4320ca6b9cf9558c0b1218fc58b731e5e13754d1c75631bbae52db
[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" "fa7810021f4320ca6b9cf9558c0b1218fc58b731e5e13754d1c75631bbae52db", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (flow) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking strsim v0.5.2
[INFO] [stderr]     Checking unicode-segmentation v0.1.3
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking toml v0.2.1
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking flow v0.3.5
[INFO] [stdout] error[E0658]: use of unstable library feature 'option_result_contains'
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/flow-0.3.5/src/ui/input.rs:93:17
[INFO] [stdout]    |
[INFO] [stdout] 93 |         if name.contains('^') {
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #62358 <https://github.com/rust-lang/rust/issues/62358> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/flow-0.3.5/src/ui/input.rs:93:26
[INFO] [stdout]    |
[INFO] [stdout] 93 |         if name.contains('^') {
[INFO] [stdout]    |                          ^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          expected reference, found `char`
[INFO] [stdout]    |                          help: consider borrowing here: `&'^'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&_`
[INFO] [stdout]                    found type `char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `chars` found for enum `Option<std::string::String>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/flow-0.3.5/src/ui/input.rs:95:40
[INFO] [stdout]    |
[INFO] [stdout] 95 |             let value = Key::Char(name.chars().last().unwrap());
[INFO] [stdout]    |                                        ^^^^^ method not found in `Option<std::string::String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0599, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flow`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "fa7810021f4320ca6b9cf9558c0b1218fc58b731e5e13754d1c75631bbae52db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa7810021f4320ca6b9cf9558c0b1218fc58b731e5e13754d1c75631bbae52db", kill_on_drop: false }`
[INFO] [stdout] fa7810021f4320ca6b9cf9558c0b1218fc58b731e5e13754d1c75631bbae52db