[INFO] cloning repository https://github.com/antonmisa/rust_simple_http_rocket
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/antonmisa/rust_simple_http_rocket" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantonmisa%2Frust_simple_http_rocket", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantonmisa%2Frust_simple_http_rocket'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f30aa8524c33d735cc2716d43b460577deb1132
[INFO] checking antonmisa/rust_simple_http_rocket against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantonmisa%2Frust_simple_http_rocket" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/antonmisa/rust_simple_http_rocket on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/antonmisa/rust_simple_http_rocket
[INFO] finished tweaking git repo https://github.com/antonmisa/rust_simple_http_rocket
[INFO] tweaked toml for git repo https://github.com/antonmisa/rust_simple_http_rocket written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/antonmisa/rust_simple_http_rocket already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 00c322f6eb98a3e8254a3dc8f802da8a143bc9e1275f82cf3b5f8b09ce759d6e
[INFO] running `Command { std: "docker" "start" "-a" "00c322f6eb98a3e8254a3dc8f802da8a143bc9e1275f82cf3b5f8b09ce759d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00c322f6eb98a3e8254a3dc8f802da8a143bc9e1275f82cf3b5f8b09ce759d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00c322f6eb98a3e8254a3dc8f802da8a143bc9e1275f82cf3b5f8b09ce759d6e", kill_on_drop: false }`
[INFO] [stdout] 00c322f6eb98a3e8254a3dc8f802da8a143bc9e1275f82cf3b5f8b09ce759d6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd830c0313d0cf09a16957b729d2fd2235ff0947914aae3a3320192ffc526a00
[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" "fd830c0313d0cf09a16957b729d2fd2235ff0947914aae3a3320192ffc526a00", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling smallvec v1.4.1
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]    Compiling rocket_http v0.4.5
[INFO] [stderr]    Compiling rocket_codegen v0.4.5
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rocket v0.4.5
[INFO] [stderr]     Checking rocket v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stdout]   --> src/main.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |  / fn main() {
[INFO] [stdout] 13 |  |     let config = Config::build(Environment::Staging)
[INFO] [stdout]    |  |__________________^
[INFO] [stdout] 14 | ||         .address("0.0.0.0")
[INFO] [stdout] 15 | ||         .port(8000)
[INFO] [stdout] 16 | ||         .finalize()?;
[INFO] [stdout]    | ||____________________^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 17 |  |     
[INFO] [stdout] 18 |  |     rocket::custom(config).mount("/", routes![index]).launch();
[INFO] [stdout] 19 |  | }
[INFO] [stdout]    |  |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `std::ops::Try::from_error`
[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 `rocket`.
[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[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stdout]   --> src/main.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |  / fn main() {
[INFO] [stdout] 13 |  |     let config = Config::build(Environment::Staging)
[INFO] [stdout]    |  |__________________^
[INFO] [stdout] 14 | ||         .address("0.0.0.0")
[INFO] [stdout] 15 | ||         .port(8000)
[INFO] [stdout] 16 | ||         .finalize()?;
[INFO] [stdout]    | ||____________________^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 17 |  |     
[INFO] [stdout] 18 |  |     rocket::custom(config).mount("/", routes![index]).launch();
[INFO] [stdout] 19 |  | }
[INFO] [stdout]    |  |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `std::ops::Try::from_error`
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "fd830c0313d0cf09a16957b729d2fd2235ff0947914aae3a3320192ffc526a00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd830c0313d0cf09a16957b729d2fd2235ff0947914aae3a3320192ffc526a00", kill_on_drop: false }`
[INFO] [stdout] fd830c0313d0cf09a16957b729d2fd2235ff0947914aae3a3320192ffc526a00