[INFO] fetching crate serial-number 0.1.1...
[INFO] checking serial-number-0.1.1 against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] extracting crate serial-number 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate serial-number 0.1.1 on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serial-number 0.1.1
[INFO] finished tweaking crates.io crate serial-number 0.1.1
[INFO] tweaked toml for crates.io crate serial-number 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "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] 74e74468d6cfb5be09de8a96295dd6f763be889d68f716fa284bc31d0caa41e1
[INFO] running `Command { std: "docker" "start" "-a" "74e74468d6cfb5be09de8a96295dd6f763be889d68f716fa284bc31d0caa41e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74e74468d6cfb5be09de8a96295dd6f763be889d68f716fa284bc31d0caa41e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74e74468d6cfb5be09de8a96295dd6f763be889d68f716fa284bc31d0caa41e1", kill_on_drop: false }`
[INFO] [stdout] 74e74468d6cfb5be09de8a96295dd6f763be889d68f716fa284bc31d0caa41e1
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99772a138952e3fafae64e7890885b06127ebfefba652888e87c4b243a4aac25
[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" "99772a138952e3fafae64e7890885b06127ebfefba652888e87c4b243a4aac25", kill_on_drop: false }`
[INFO] [stderr]     Checking serial-number v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:35:32
[INFO] [stdout]    |
[INFO] [stdout] 35 |     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]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:67:26
[INFO] [stdout]    |
[INFO] [stdout] 67 |             let left_a = try!(u8::from_str_radix(&fragment[0..2], 16));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:68:26
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let left_b = try!(u8::from_str_radix(&fragment[2..4], 16));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:69:26
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let left_c = try!(u8::from_str_radix(&fragment[4..6], 16));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let right_a = try!(u8::from_str_radix(&fragment[6..8], 16));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:71:27
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let right_b = try!(u8::from_str_radix(&fragment[8..10], 16));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:72:27
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let right_c = try!(u8::from_str_radix(&fragment[10..12], 16));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         try!(write!(f, "{:04X}", self.seed));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |             try!(write!(f, "-{}", group));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:126:24
[INFO] [stdout]     |
[INFO] [stdout] 126 |             let seed = try!(i64::from_str_radix(&seed, 16));
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:132:28
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 let left = try!(u8::from_str_radix(&fragment[0..2], 16));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:133:29
[INFO] [stdout]     |
[INFO] [stdout] 133 |                 let right = try!(u8::from_str_radix(&fragment[2..4], 16));
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:35:32
[INFO] [stdout]    |
[INFO] [stdout] 35 |     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]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:67:26
[INFO] [stdout]    |
[INFO] [stdout] 67 |             let left_a = try!(u8::from_str_radix(&fragment[0..2], 16));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:68:26
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let left_b = try!(u8::from_str_radix(&fragment[2..4], 16));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:69:26
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let left_c = try!(u8::from_str_radix(&fragment[4..6], 16));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let right_a = try!(u8::from_str_radix(&fragment[6..8], 16));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:71:27
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let right_b = try!(u8::from_str_radix(&fragment[8..10], 16));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:72:27
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let right_c = try!(u8::from_str_radix(&fragment[10..12], 16));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         try!(write!(f, "{:04X}", self.seed));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |             try!(write!(f, "-{}", group));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:126:24
[INFO] [stdout]     |
[INFO] [stdout] 126 |             let seed = try!(i64::from_str_radix(&seed, 16));
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:132:28
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 let left = try!(u8::from_str_radix(&fragment[0..2], 16));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:133:29
[INFO] [stdout]     |
[INFO] [stdout] 133 |                 let right = try!(u8::from_str_radix(&fragment[2..4], 16));
[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/lib.rs:44:30
[INFO] [stdout]    |
[INFO] [stdout] 44 |         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/lib.rs:44:30
[INFO] [stdout]    |
[INFO] [stdout] 44 |         write!(f, "{}", self.description())
[INFO] [stdout]    |                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "99772a138952e3fafae64e7890885b06127ebfefba652888e87c4b243a4aac25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99772a138952e3fafae64e7890885b06127ebfefba652888e87c4b243a4aac25", kill_on_drop: false }`
[INFO] [stdout] 99772a138952e3fafae64e7890885b06127ebfefba652888e87c4b243a4aac25