[INFO] fetching crate dns-parser 0.8.0...
[INFO] checking dns-parser-0.8.0 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate dns-parser 0.8.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate dns-parser 0.8.0 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dns-parser 0.8.0
[INFO] finished tweaking crates.io crate dns-parser 0.8.0
[INFO] tweaked toml for crates.io crate dns-parser 0.8.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1202d2c7eecd34fb18526ba0095ccdb1b35a81d582996fb808ffcd42ed2c6481
[INFO] running `Command { std: "docker" "start" "-a" "1202d2c7eecd34fb18526ba0095ccdb1b35a81d582996fb808ffcd42ed2c6481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1202d2c7eecd34fb18526ba0095ccdb1b35a81d582996fb808ffcd42ed2c6481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1202d2c7eecd34fb18526ba0095ccdb1b35a81d582996fb808ffcd42ed2c6481", kill_on_drop: false }`
[INFO] [stdout] 1202d2c7eecd34fb18526ba0095ccdb1b35a81d582996fb808ffcd42ed2c6481
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2234baf82ddf034704df68fa43456d3a4f5e1d9764d0aa6034663cbf6b2f4138
[INFO] running `Command { std: "docker" "start" "-a" "2234baf82ddf034704df68fa43456d3a4f5e1d9764d0aa6034663cbf6b2f4138", kill_on_drop: false }`
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking dns-parser v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/enums.rs:192:14
[INFO] [stdout]     |
[INFO] [stdout] 192 |             6...15  => Reserved(code),
[INFO] [stdout]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/name.rs:112:21
[INFO] [stdout]     |
[INFO] [stdout] 112 |                     try!(fmt.write_char('.'));
[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/name.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 try!(fmt.write_str(from_utf8(&data[pos+1..end]).unwrap()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/name.rs:118:21
[INFO] [stdout]     |
[INFO] [stdout] 118 |                     try!(fmt.write_char('.'));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:15:22
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let header = try!(Header::parse(data));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:19:24
[INFO] [stdout]    |
[INFO] [stdout] 19 |             let name = try!(Name::scan(&data[offset..], data));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 |             let qtype = try!(QueryType::parse(
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:28:44
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let (prefer_unicast, qclass) = try!(parse_qclass_code(
[INFO] [stdout]    |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:41:26
[INFO] [stdout]    |
[INFO] [stdout] 41 |             answers.push(try!(parse_record(data, &mut offset)));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:45:30
[INFO] [stdout]    |
[INFO] [stdout] 45 |             nameservers.push(try!(parse_record(data, &mut offset)));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     opt = Some(try!(parse_opt_record(data, &mut offset)));
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:57:33
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 additional.push(try!(parse_record(data, &mut offset)));
[INFO] [stdout]    |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:75:18
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let qclass = try!(QueryClass::parse(qclass_code));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:83:15
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let cls = try!(Class::parse(class_code));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:89:16
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let name = try!(Name::scan(&data[*offset..], data));
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:94:15
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let typ = try!(Type::parse(
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:99:35
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let (multicast_unique, cls) = try!(parse_class_code(class_code));
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:112:16
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let data = try!(RData::parse(typ,
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:130:15
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let typ = try!(Type::parse(
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:149:16
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let data = try!(RData::parse(typ,
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/rdata/soa.rs:22:35
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let primary_name_server = try!(Name::scan(rdata, original));
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/rdata/soa.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let mailbox = try!(Name::scan(&rdata[pos..], original));
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/enums.rs:192:14
[INFO] [stdout]     |
[INFO] [stdout] 192 |             6...15  => Reserved(code),
[INFO] [stdout]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/name.rs:112:21
[INFO] [stdout]     |
[INFO] [stdout] 112 |                     try!(fmt.write_char('.'));
[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/name.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 try!(fmt.write_str(from_utf8(&data[pos+1..end]).unwrap()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/name.rs:118:21
[INFO] [stdout]     |
[INFO] [stdout] 118 |                     try!(fmt.write_char('.'));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:15:22
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let header = try!(Header::parse(data));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:19:24
[INFO] [stdout]    |
[INFO] [stdout] 19 |             let name = try!(Name::scan(&data[offset..], data));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 |             let qtype = try!(QueryType::parse(
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:28:44
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let (prefer_unicast, qclass) = try!(parse_qclass_code(
[INFO] [stdout]    |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:41:26
[INFO] [stdout]    |
[INFO] [stdout] 41 |             answers.push(try!(parse_record(data, &mut offset)));
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:45:30
[INFO] [stdout]    |
[INFO] [stdout] 45 |             nameservers.push(try!(parse_record(data, &mut offset)));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     opt = Some(try!(parse_opt_record(data, &mut offset)));
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:57:33
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 additional.push(try!(parse_record(data, &mut offset)));
[INFO] [stdout]    |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:75:18
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let qclass = try!(QueryClass::parse(qclass_code));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:83:15
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let cls = try!(Class::parse(class_code));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:89:16
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let name = try!(Name::scan(&data[*offset..], data));
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:94:15
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let typ = try!(Type::parse(
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:99:35
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let (multicast_unique, cls) = try!(parse_class_code(class_code));
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:112:16
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let data = try!(RData::parse(typ,
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:130:15
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let typ = try!(Type::parse(
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/parser.rs:149:16
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let data = try!(RData::parse(typ,
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/rdata/soa.rs:22:35
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let primary_name_server = try!(Name::scan(rdata, original));
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/rdata/soa.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let mailbox = try!(Name::scan(&rdata[pos..], original));
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/sync_tcp_client.rs:29:42
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn resolve(name: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn resolve(name: &str) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/sync_udp_client.rs:28:42
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn resolve(name: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn resolve(name: &str) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "2234baf82ddf034704df68fa43456d3a4f5e1d9764d0aa6034663cbf6b2f4138", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2234baf82ddf034704df68fa43456d3a4f5e1d9764d0aa6034663cbf6b2f4138", kill_on_drop: false }`
[INFO] [stdout] 2234baf82ddf034704df68fa43456d3a4f5e1d9764d0aa6034663cbf6b2f4138
