[INFO] fetching crate rustc_version 0.2.3...
[INFO] checking rustc_version-0.2.3 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate rustc_version 0.2.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rustc_version 0.2.3 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustc_version 0.2.3
[INFO] finished tweaking crates.io crate rustc_version 0.2.3
[INFO] tweaked toml for crates.io crate rustc_version 0.2.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fdfdc08900ea1525676de626748988e881110aafc4e180c56a24aa2802fb8d3
[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" "8fdfdc08900ea1525676de626748988e881110aafc4e180c56a24aa2802fb8d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fdfdc08900ea1525676de626748988e881110aafc4e180c56a24aa2802fb8d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fdfdc08900ea1525676de626748988e881110aafc4e180c56a24aa2802fb8d3", kill_on_drop: false }`
[INFO] [stdout] 8fdfdc08900ea1525676de626748988e881110aafc4e180c56a24aa2802fb8d3
[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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] de3cbed1cc57d36c498bc12fc814bfbd1ec6551dbec6eec084f66aca38c6f2bb
[INFO] running `Command { std: "docker" "start" "-a" "de3cbed1cc57d36c498bc12fc814bfbd1ec6551dbec6eec084f66aca38c6f2bb", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc_version v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:37:32
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:37:32
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:26:71
[INFO] [stdout]    |
[INFO] [stdout] 26 |             CouldNotExecuteCommand(ref e) => write!(f, "{}: {}", self.description(), e),
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:27:50
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Utf8Error(_) => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:28:61
[INFO] [stdout]    |
[INFO] [stdout] 28 |             UnexpectedVersionFormat => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:29:62
[INFO] [stdout]    |
[INFO] [stdout] 29 |             ReqParseError(ref e) => write!(f, "{}: {}", self.description(), e),
[INFO] [stdout]    |                                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:30:60
[INFO] [stdout]    |
[INFO] [stdout] 30 |             SemVerError(ref e) => write!(f, "{}: {}", self.description(), e),
[INFO] [stdout]    |                                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:31:69
[INFO] [stdout]    |
[INFO] [stdout] 31 |             UnknownPreReleaseTag(ref i) => write!(f, "{}: {}", self.description(), i),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:26:71
[INFO] [stdout]    |
[INFO] [stdout] 26 |             CouldNotExecuteCommand(ref e) => write!(f, "{}: {}", self.description(), e),
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:27:50
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Utf8Error(_) => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:28:61
[INFO] [stdout]    |
[INFO] [stdout] 28 |             UnexpectedVersionFormat => write!(f, "{}", self.description()),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:29:62
[INFO] [stdout]    |
[INFO] [stdout] 29 |             ReqParseError(ref e) => write!(f, "{}: {}", self.description(), e),
[INFO] [stdout]    |                                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:30:60
[INFO] [stdout]    |
[INFO] [stdout] 30 |             SemVerError(ref e) => write!(f, "{}: {}", self.description(), e),
[INFO] [stdout]    |                                                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:31:69
[INFO] [stdout]    |
[INFO] [stdout] 31 |             UnknownPreReleaseTag(ref i) => write!(f, "{}: {}", self.description(), i),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "de3cbed1cc57d36c498bc12fc814bfbd1ec6551dbec6eec084f66aca38c6f2bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de3cbed1cc57d36c498bc12fc814bfbd1ec6551dbec6eec084f66aca38c6f2bb", kill_on_drop: false }`
[INFO] [stdout] de3cbed1cc57d36c498bc12fc814bfbd1ec6551dbec6eec084f66aca38c6f2bb
