[INFO] fetching crate retrobasic 0.1.0...
[INFO] testing retrobasic-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate retrobasic 0.1.0 into /workspace/builds/worker-98/source
[INFO] validating manifest of crates.io crate retrobasic 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate retrobasic 0.1.0
[INFO] finished tweaking crates.io crate retrobasic 0.1.0
[INFO] tweaked toml for crates.io crate retrobasic 0.1.0 written to /workspace/builds/worker-98/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded humantime v1.3.0
[INFO] [stderr]   Downloaded env_logger v0.5.13
[INFO] [stderr]   Downloaded dimsum v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a76098e165c2cea1565eb6add81a8ff41e88806f8e72f0782f19cbac6e1b47d
[INFO] running `Command { std: "docker" "start" "-a" "9a76098e165c2cea1565eb6add81a8ff41e88806f8e72f0782f19cbac6e1b47d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a76098e165c2cea1565eb6add81a8ff41e88806f8e72f0782f19cbac6e1b47d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a76098e165c2cea1565eb6add81a8ff41e88806f8e72f0782f19cbac6e1b47d", kill_on_drop: false }`
[INFO] [stdout] 9a76098e165c2cea1565eb6add81a8ff41e88806f8e72f0782f19cbac6e1b47d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0884d2de82bf2c936a3574c6030fd8187c07edddb1b93c6b46ab1e84b7279a2
[INFO] running `Command { std: "docker" "start" "-a" "b0884d2de82bf2c936a3574c6030fd8187c07edddb1b93c6b46ab1e84b7279a2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling slab v0.4.4
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[INFO] [stderr]    Compiling smallvec v0.2.1
[INFO] [stderr]    Compiling slab v0.3.0
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[INFO] [stderr]    Compiling take v0.1.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling dimsum v0.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling unicase v2.6.0
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[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling textwrap v0.11.0
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[INFO] [stderr]    Compiling base64 v0.9.3
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[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling want v0.0.4
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling crossbeam-deque v0.7.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.18
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling retrobasic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:30:32
[INFO] [stdout]    |
[INFO] [stdout] 30 |     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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 167 |             '0'...'9' | '.' => self.number(),
[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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:169:16
[INFO] [stdout]     |
[INFO] [stdout] 169 |             'a'...'z' | 'A'...'Z' => self.identifier(),
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:169:28
[INFO] [stdout]     |
[INFO] [stdout] 169 |             'a'...'z' | 'A'...'Z' => self.identifier(),
[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 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/main.rs:89:64
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 println!("Couldn't open {}: {}", filename, why.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/main.rs:98:64
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 println!("couldn't read {}: {}", filename, why.description());
[INFO] [stdout]    |                                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.81s
[INFO] running `Command { std: "docker" "inspect" "b0884d2de82bf2c936a3574c6030fd8187c07edddb1b93c6b46ab1e84b7279a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0884d2de82bf2c936a3574c6030fd8187c07edddb1b93c6b46ab1e84b7279a2", kill_on_drop: false }`
[INFO] [stdout] b0884d2de82bf2c936a3574c6030fd8187c07edddb1b93c6b46ab1e84b7279a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81f51906598b7af590f5f839e4898ac60b52da0aff88b49971b8c3730d72f88b
[INFO] running `Command { std: "docker" "start" "-a" "81f51906598b7af590f5f839e4898ac60b52da0aff88b49971b8c3730d72f88b", 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] [stderr]    Compiling retrobasic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:30:32
[INFO] [stdout]    |
[INFO] [stdout] 30 |     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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 167 |             '0'...'9' | '.' => self.number(),
[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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:169:16
[INFO] [stdout]     |
[INFO] [stdout] 169 |             'a'...'z' | 'A'...'Z' => self.identifier(),
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:169:28
[INFO] [stdout]     |
[INFO] [stdout] 169 |             'a'...'z' | 'A'...'Z' => self.identifier(),
[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 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/main.rs:89:64
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 println!("Couldn't open {}: {}", filename, why.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/main.rs:98:64
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 println!("couldn't read {}: {}", filename, why.description());
[INFO] [stdout]    |                                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.79s
[INFO] running `Command { std: "docker" "inspect" "81f51906598b7af590f5f839e4898ac60b52da0aff88b49971b8c3730d72f88b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81f51906598b7af590f5f839e4898ac60b52da0aff88b49971b8c3730d72f88b", kill_on_drop: false }`
[INFO] [stdout] 81f51906598b7af590f5f839e4898ac60b52da0aff88b49971b8c3730d72f88b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b305aef808bae48cd3ff96687715c1072ecc2a101ce3d4f27896079a75ca7c7d
[INFO] running `Command { std: "docker" "start" "-a" "b305aef808bae48cd3ff96687715c1072ecc2a101ce3d4f27896079a75ca7c7d", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:30:32
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:167:16
[INFO] [stderr]     |
[INFO] [stderr] 167 |             '0'...'9' | '.' => self.number(),
[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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:169:16
[INFO] [stderr]     |
[INFO] [stderr] 169 |             'a'...'z' | 'A'...'Z' => self.identifier(),
[INFO] [stderr]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:169:28
[INFO] [stderr]     |
[INFO] [stderr] 169 |             'a'...'z' | 'A'...'Z' => self.identifier(),
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[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/main.rs:89:64
[INFO] [stderr]    |
[INFO] [stderr] 89 |                 println!("Couldn't open {}: {}", filename, why.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/main.rs:98:64
[INFO] [stderr]    |
[INFO] [stderr] 98 |                 println!("couldn't read {}: {}", filename, why.description());
[INFO] [stderr]    |                                                                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `retrobasic` (bin "retrobasic" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/retrobasic-c5aed5dd82cbb258)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test ast::tests::can_add_children ... ok
[INFO] [stdout] test interpreter::tests::can_execute_basic_statements ... ok
[INFO] [stdout] test interpreter::tests::can_execute_statements_with_optional_arguments ... ok
[INFO] [stdout] test interpreter::tests::can_execute_expressions ... ok
[INFO] [stdout] test interpreter::tests::can_execute_built_in_functions ... ok
[INFO] [stdout] test lexer::tests::can_tokenize_statement ... ok
[INFO] [stdout] test parser::tests::can_parse_builtin_functions ... ok
[INFO] [stdout] test parser::tests::can_parse_multi_statement ... ok
[INFO] [stdout] test tokenid::tests::can_convert_from_string ... ok
[INFO] [stdout] test parser::tests::can_parse_expressions ... ok
[INFO] [stdout] test parser::tests::can_parse_single_statement ... ok
[INFO] [stdout] test parser::tests::can_parse_multiple_lines ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b305aef808bae48cd3ff96687715c1072ecc2a101ce3d4f27896079a75ca7c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b305aef808bae48cd3ff96687715c1072ecc2a101ce3d4f27896079a75ca7c7d", kill_on_drop: false }`
[INFO] [stdout] b305aef808bae48cd3ff96687715c1072ecc2a101ce3d4f27896079a75ca7c7d
