[INFO] fetching crate lcov-parser 3.2.2...
[INFO] testing lcov-parser-3.2.2 against 1.54.0 for beta-1.55-1
[INFO] extracting crate lcov-parser 3.2.2 into /workspace/builds/worker-53/source
[INFO] validating manifest of crates.io crate lcov-parser 3.2.2 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 lcov-parser 3.2.2
[INFO] finished tweaking crates.io crate lcov-parser 3.2.2
[INFO] tweaked toml for crates.io crate lcov-parser 3.2.2 written to /workspace/builds/worker-53/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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] ecd9c88e8ca76f33235699d6452c5282cb8c0e017573c42c91ecead347e7adcf
[INFO] running `Command { std: "docker" "start" "-a" "ecd9c88e8ca76f33235699d6452c5282cb8c0e017573c42c91ecead347e7adcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecd9c88e8ca76f33235699d6452c5282cb8c0e017573c42c91ecead347e7adcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd9c88e8ca76f33235699d6452c5282cb8c0e017573c42c91ecead347e7adcf", kill_on_drop: false }`
[INFO] [stdout] ecd9c88e8ca76f33235699d6452c5282cb8c0e017573c42c91ecead347e7adcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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] 5237ae694d7e760c6045b7c4e0889609f05d788d3363c49d0c936d06d335ef40
[INFO] running `Command { std: "docker" "start" "-a" "5237ae694d7e760c6045b7c4e0889609f05d788d3363c49d0c936d06d335ef40", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling ascii v0.7.1
[INFO] [stderr]    Compiling combine v2.5.2
[INFO] [stderr]    Compiling lcov-parser v3.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/merger/ops/mod.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn merge(&mut self, Rhs);
[INFO] [stdout]    |                         ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` 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 2018 edition!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/merger/ops/mod.rs:27:29
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn try_merge(&mut self, Rhs) -> MergeResult<Self::Err>;
[INFO] [stdout]    |                             ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[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/parser.rs:76:50
[INFO] [stdout]    |
[INFO] [stdout] 76 |             &ParseError::IOError(ref err) => err.description(),
[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/parser.rs:77:59
[INFO] [stdout]    |
[INFO] [stdout] 77 |             &ParseError::RecordParseError(ref err) => err.description(),
[INFO] [stdout]    |                                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.32s
[INFO] running `Command { std: "docker" "inspect" "5237ae694d7e760c6045b7c4e0889609f05d788d3363c49d0c936d06d335ef40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5237ae694d7e760c6045b7c4e0889609f05d788d3363c49d0c936d06d335ef40", kill_on_drop: false }`
[INFO] [stdout] 5237ae694d7e760c6045b7c4e0889609f05d788d3363c49d0c936d06d335ef40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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] ab62b5a618077fcaae6baf893b28c3cc9858ed505c9fdd42ba638c007d6ac714
[INFO] running `Command { std: "docker" "start" "-a" "ab62b5a618077fcaae6baf893b28c3cc9858ed505c9fdd42ba638c007d6ac714", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/merger/ops/mod.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn merge(&mut self, Rhs);
[INFO] [stdout]    |                         ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` 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 2018 edition!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/merger/ops/mod.rs:27:29
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn try_merge(&mut self, Rhs) -> MergeResult<Self::Err>;
[INFO] [stdout]    |                             ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[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/parser.rs:76:50
[INFO] [stdout]    |
[INFO] [stdout] 76 |             &ParseError::IOError(ref err) => err.description(),
[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/parser.rs:77:59
[INFO] [stdout]    |
[INFO] [stdout] 77 |             &ParseError::RecordParseError(ref err) => err.description(),
[INFO] [stdout]    |                                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling lcov-parser v3.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> examples/marge_files.rs:18:28
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Err(err) => panic!(err)
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Err(err) => panic!("{}", err)
[INFO] [stdout]    |                            ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Err(err) => std::panic::panic_any(err)
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/merger/ops/mod.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn merge(&mut self, Rhs);
[INFO] [stdout]    |                         ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` 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 2018 edition!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/merger/ops/mod.rs:27:29
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn try_merge(&mut self, Rhs) -> MergeResult<Self::Err>;
[INFO] [stdout]    |                             ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[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/parser.rs:76:50
[INFO] [stdout]    |
[INFO] [stdout] 76 |             &ParseError::IOError(ref err) => err.description(),
[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/parser.rs:77:59
[INFO] [stdout]    |
[INFO] [stdout] 77 |             &ParseError::RecordParseError(ref err) => err.description(),
[INFO] [stdout]    |                                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.86s
[INFO] running `Command { std: "docker" "inspect" "ab62b5a618077fcaae6baf893b28c3cc9858ed505c9fdd42ba638c007d6ac714", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab62b5a618077fcaae6baf893b28c3cc9858ed505c9fdd42ba638c007d6ac714", kill_on_drop: false }`
[INFO] [stdout] ab62b5a618077fcaae6baf893b28c3cc9858ed505c9fdd42ba638c007d6ac714
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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] 4008581dafcdeb25971bf0a959ca6dbcc86a241a60a385f4d8a4c1d17c3b5bc3
[INFO] running `Command { std: "docker" "start" "-a" "4008581dafcdeb25971bf0a959ca6dbcc86a241a60a385f4d8a4c1d17c3b5bc3", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout] running 36 tests
[INFO] [stderr]   --> src/merger/ops/mod.rs:22:25
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn merge(&mut self, Rhs);
[INFO] [stderr]    |                         ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(anonymous_parameters)]` 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 2018 edition!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]   --> src/merger/ops/mod.rs:27:29
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn try_merge(&mut self, Rhs) -> MergeResult<Self::Err>;
[INFO] [stderr]    |                             ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/parser.rs:76:50
[INFO] [stderr]    |
[INFO] [stderr] 76 |             &ParseError::IOError(ref err) => err.description(),
[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/parser.rs:77:59
[INFO] [stderr]    |
[INFO] [stderr] 77 |             &ParseError::RecordParseError(ref err) => err.description(),
[INFO] [stderr]    |                                                           ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]   --> src/merger/ops/mod.rs:22:25
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn merge(&mut self, Rhs);
[INFO] [stderr]    |                         ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(anonymous_parameters)]` 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 2018 edition!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]   --> src/merger/ops/mod.rs:27:29
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn try_merge(&mut self, Rhs) -> MergeResult<Self::Err>;
[INFO] [stderr]    |                             ^^^ help: try naming the parameter or explicitly ignoring it: `_: Rhs`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/parser.rs:76:50
[INFO] [stderr]    |
[INFO] [stderr] 76 |             &ParseError::IOError(ref err) => err.description(),
[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/parser.rs:77:59
[INFO] [stderr]    |
[INFO] [stderr] 77 |             &ParseError::RecordParseError(ref err) => err.description(),
[INFO] [stderr]    |                                                           ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> examples/marge_files.rs:18:28
[INFO] [stderr]    |
[INFO] [stderr] 18 |         Err(err) => panic!(err)
[INFO] [stderr]    |                            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 18 |         Err(err) => panic!("{}", err)
[INFO] [stderr]    |                            ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 18 |         Err(err) => std::panic::panic_any(err)
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lcov_parser-f724159aebe17ed6)
[INFO] [stdout] test combinator::tests::branch_data ... ok
[INFO] [stdout] test combinator::tests::branch_data_with_branch_times ... ok
[INFO] [stdout] test combinator::tests::branches_found ... ok
[INFO] [stdout] test combinator::tests::branches_hit ... ok
[INFO] [stdout] test combinator::tests::data ... ok
[INFO] [stdout] test combinator::tests::data_with_checksum ... ok
[INFO] [stdout] test combinator::tests::end_of_record ... ok
[INFO] [stdout] test combinator::tests::function_data ... ok
[INFO] [stdout] test combinator::tests::functions_found ... ok
[INFO] [stdout] test combinator::tests::function_name ... ok
[INFO] [stdout] test combinator::tests::functions_hit ... ok
[INFO] [stdout] test combinator::tests::lines_found ... ok
[INFO] [stdout] test combinator::tests::lines_hit ... ok
[INFO] [stdout] test combinator::tests::source_file ... ok
[INFO] [stdout] test combinator::tests::test_name ... ok
[INFO] [stdout] test merger::ops::tests::merge_error_of_checksum ... ok
[INFO] [stdout] test report::branch::tests::add_branch_data ... ok
[INFO] [stdout] test merger::merger::tests::merge_checksum_error ... ok
[INFO] [stdout] test report::branch::tests::append_branches ... ok
[INFO] [stdout] test report::branch::tests::branch_blocks_hit_count_and_found_count ... ok
[INFO] [stdout] test report::branch::tests::branch_unit ... ok
[INFO] [stdout] test report::branch::tests::branch_unit_as_hash_key ... ok
[INFO] [stdout] test report::function::tests::add_function_data ... ok
[INFO] [stdout] test report::branch::tests::branches_hit_count_and_found_count ... ok
[INFO] [stdout] test report::function::tests::add_functions_data ... ok
[INFO] [stdout] test report::function::tests::hit_count_and_found_count ... ok
[INFO] [stdout] test report::line::tests::add_line_data ... ok
[INFO] [stdout] test report::line::tests::add_lines_data ... ok
[INFO] [stdout] test report::line::tests::hit_count_and_found_count ... ok
[INFO] [stdout] test report::test::tests::add_branch_data ... ok
[INFO] [stdout] test report::test::tests::add_test_data ... ok
[INFO] [stdout] test report::test::tests::add_tests_data ... ok
[INFO] [stdout] test report::tests::display ... ok
[INFO] [stdout] test merger::merger::tests::merge_checksum_one_side ... ok
[INFO] [stdout] test report::tests::save_as ... ok
[INFO] [stdout] test merger::merger::tests::merge_checksum ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 36 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/without_checksum.rs (/opt/rustwide/target/debug/deps/without_checksum-5be9a2070042bfd2)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test without_checksum ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lcov-parser
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/report/branch.rs - report::branch::BranchUnit (line 25) ... ok
[INFO] [stdout] test src/record.rs - record::LCOVRecord (line 66) ... ok
[INFO] [stdout] test src/parser.rs - parser::parse_record (line 188) ... ok
[INFO] [stdout] test src/parser.rs - parser::LCOVParser (line 95) ... ok
[INFO] [stdout] test src/parser.rs - parser::parse_report (line 206) ... ok
[INFO] [stdout] test src/parser.rs - parser::LCOVParser<File> (line 169) ... ok
[INFO] [stdout] test src/merger/mod.rs - merger::merge_files (line 22) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.62s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4008581dafcdeb25971bf0a959ca6dbcc86a241a60a385f4d8a4c1d17c3b5bc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4008581dafcdeb25971bf0a959ca6dbcc86a241a60a385f4d8a4c1d17c3b5bc3", kill_on_drop: false }`
[INFO] [stdout] 4008581dafcdeb25971bf0a959ca6dbcc86a241a60a385f4d8a4c1d17c3b5bc3
