[INFO] fetching crate oxidant 0.1.0...
[INFO] testing oxidant-0.1.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate oxidant 0.1.0 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate oxidant 0.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate oxidant 0.1.0
[INFO] finished tweaking crates.io crate oxidant 0.1.0
[INFO] tweaked toml for crates.io crate oxidant 0.1.0 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba26406818aae866f105811a7e5c032609ab2fe5d22b29fe2fac77c4d761fb4c
[INFO] running `Command { std: "docker" "start" "-a" "ba26406818aae866f105811a7e5c032609ab2fe5d22b29fe2fac77c4d761fb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba26406818aae866f105811a7e5c032609ab2fe5d22b29fe2fac77c4d761fb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba26406818aae866f105811a7e5c032609ab2fe5d22b29fe2fac77c4d761fb4c", kill_on_drop: false }`
[INFO] [stdout] ba26406818aae866f105811a7e5c032609ab2fe5d22b29fe2fac77c4d761fb4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cb695b058bb8de54b8f5b10505c9c66782b1d3de75352dd6dc6c10053c395b3
[INFO] running `Command { std: "docker" "start" "-a" "3cb695b058bb8de54b8f5b10505c9c66782b1d3de75352dd6dc6c10053c395b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling json v0.11.15
[INFO] [stderr]    Compiling oxidant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/bencode/mod.rs:251:16
[INFO] [stdout]     |
[INFO] [stdout] 251 |             '0'...'9' => return Self::parse_string(iter),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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 associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:103:30
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 return Err(e.description().to_string());
[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/bencode/mod.rs:187:33
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 Err(e) => Err(e.description().to_string()),
[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/bencode/mod.rs:241:29
[INFO] [stdout]     |
[INFO] [stdout] 241 |             Err(e) => Err(e.description().to_string()),
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bencode/mod.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 let mut key: String;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.71s
[INFO] running `Command { std: "docker" "inspect" "3cb695b058bb8de54b8f5b10505c9c66782b1d3de75352dd6dc6c10053c395b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb695b058bb8de54b8f5b10505c9c66782b1d3de75352dd6dc6c10053c395b3", kill_on_drop: false }`
[INFO] [stdout] 3cb695b058bb8de54b8f5b10505c9c66782b1d3de75352dd6dc6c10053c395b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdc67524e9b5f8579d53390c7bbbff2b100952fa6c7ef7e09bec5c0c5384beca
[INFO] running `Command { std: "docker" "start" "-a" "fdc67524e9b5f8579d53390c7bbbff2b100952fa6c7ef7e09bec5c0c5384beca", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/bencode/mod.rs:251:16
[INFO] [stdout]     |
[INFO] [stdout] 251 |             '0'...'9' => return Self::parse_string(iter),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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] [stderr]    Compiling oxidant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:103:30
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 return Err(e.description().to_string());
[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/bencode/mod.rs:187:33
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 Err(e) => Err(e.description().to_string()),
[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/bencode/mod.rs:241:29
[INFO] [stdout]     |
[INFO] [stdout] 241 |             Err(e) => Err(e.description().to_string()),
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bencode/mod.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 let mut key: String;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/bencode/mod.rs:251:16
[INFO] [stdout]     |
[INFO] [stdout] 251 |             '0'...'9' => return Self::parse_string(iter),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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 associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:103:30
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 return Err(e.description().to_string());
[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/bencode/mod.rs:187:33
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 Err(e) => Err(e.description().to_string()),
[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/bencode/mod.rs:241:29
[INFO] [stdout]     |
[INFO] [stdout] 241 |             Err(e) => Err(e.description().to_string()),
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bencode/mod.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 let mut key: String;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.65s
[INFO] running `Command { std: "docker" "inspect" "fdc67524e9b5f8579d53390c7bbbff2b100952fa6c7ef7e09bec5c0c5384beca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdc67524e9b5f8579d53390c7bbbff2b100952fa6c7ef7e09bec5c0c5384beca", kill_on_drop: false }`
[INFO] [stdout] fdc67524e9b5f8579d53390c7bbbff2b100952fa6c7ef7e09bec5c0c5384beca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0a74d76195046ea20c2e36e2838ea2bcd225ad41e4aed6ae23786f1eebb48fee
[INFO] running `Command { std: "docker" "start" "-a" "0a74d76195046ea20c2e36e2838ea2bcd225ad41e4aed6ae23786f1eebb48fee", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stdout] running 23 tests
[INFO] [stderr]    --> src/bencode/mod.rs:251:16
[INFO] [stdout] test bencode::tests::test_bencode_dictionary_no_missing_leading_character ... ok
[INFO] [stderr]     |
[INFO] [stdout] test bencode::tests::test_bencode_dictionary_nested ... ok
[INFO] [stderr] 251 |             '0'...'9' => return Self::parse_string(iter),
[INFO] [stdout] test bencode::tests::test_bencode_dictionary_no_premature_end ... ok
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] test bencode::tests::test_bencode_dictionary_parse ... ok
[INFO] [stderr]     |
[INFO] [stdout] test bencode::tests::test_bencode_integer_negative_parse ... ok
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] test bencode::tests::test_bencode_integer_no_leading_zero ... ok
[INFO] [stderr]     = 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] test bencode::tests::test_bencode_integer_no_missing_leading_character ... ok
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] test bencode::tests::test_bencode_integer_no_negative_leading_zero ... ok
[INFO] [stderr] 
[INFO] [stdout] test bencode::tests::test_bencode_integer_no_negative_zero ... ok
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout] test bencode::tests::test_bencode_integer_no_premature_end ... ok
[INFO] [stderr]    --> src/lib.rs:103:30
[INFO] [stdout] test bencode::tests::test_bencode_integer_parse ... ok
[INFO] [stderr]     |
[INFO] [stdout] test bencode::tests::test_bencode_integer_zero ... ok
[INFO] [stderr] 103 |                 return Err(e.description().to_string());
[INFO] [stdout] test bencode::tests::test_bencode_list_nested ... ok
[INFO] [stderr]     |                              ^^^^^^^^^^^
[INFO] [stdout] test bencode::tests::test_bencode_list_no_missing_leading_character ... ok
[INFO] [stderr]     |
[INFO] [stdout] test bencode::tests::test_bencode_list_no_premature_end ... ok
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] test bencode::tests::test_bencode_list_parse ... ok
[INFO] [stderr] 
[INFO] [stdout] test bencode::tests::test_bencode_string_no_missing_leading_delimiter ... ok
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout] test bencode::tests::test_bencode_string_no_missing_leading_len ... ok
[INFO] [stderr]    --> src/bencode/mod.rs:187:33
[INFO] [stdout] test bencode::tests::test_bencode_string_no_premature_end ... ok
[INFO] [stderr]     |
[INFO] [stdout] test bencode::tests::test_bencode_string_parse ... ok
[INFO] [stderr] 187 |                 Err(e) => Err(e.description().to_string()),
[INFO] [stdout] test tests::test_parse_command ... ok
[INFO] [stderr]     |                                 ^^^^^^^^^^^
[INFO] [stdout] test tests::test_parse_command_with_args ... ok
[INFO] [stderr] 
[INFO] [stdout] test tests::test_parse_empty_command ... ok
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout] 
[INFO] [stderr]    --> src/bencode/mod.rs:241:29
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 241 |             Err(e) => Err(e.description().to_string()),
[INFO] [stderr]     |                             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bencode/mod.rs:67:21
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 let mut key: String;
[INFO] [stderr]    |                     ----^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/bencode/mod.rs:251:16
[INFO] [stderr]     |
[INFO] [stderr] 251 |             '0'...'9' => return Self::parse_string(iter),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:103:30
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 return Err(e.description().to_string());
[INFO] [stderr]     |                              ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/bencode/mod.rs:187:33
[INFO] [stderr]     |
[INFO] [stderr] 187 |                 Err(e) => Err(e.description().to_string()),
[INFO] [stderr]     |                                 ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/bencode/mod.rs:241:29
[INFO] [stderr]     |
[INFO] [stderr] 241 |             Err(e) => Err(e.description().to_string()),
[INFO] [stderr]     |                             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bencode/mod.rs:67:21
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 let mut key: String;
[INFO] [stderr]    |                     ----^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/oxidant-bec11f86b0c2d2a3)
[INFO] [stderr]    Doc-tests oxidant
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> /opt/rustwide/workdir/src/bencode/mod.rs:251:16
[INFO] [stderr]     |
[INFO] [stderr] 251 |             '0'...'9' => return Self::parse_string(iter),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0a74d76195046ea20c2e36e2838ea2bcd225ad41e4aed6ae23786f1eebb48fee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a74d76195046ea20c2e36e2838ea2bcd225ad41e4aed6ae23786f1eebb48fee", kill_on_drop: false }`
[INFO] [stdout] 0a74d76195046ea20c2e36e2838ea2bcd225ad41e4aed6ae23786f1eebb48fee
