Dec 19 12:11:58.856 INFO checking museun/blaise against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:11:58.856 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/museun/blaise:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:11:59.346 INFO [stdout] b9e8595a557c1c9e2bc7e6526a4f050791e73794284068484f13cf977f09c648
Dec 19 12:11:59.349 INFO running `"docker" "start" "-a" "b9e8595a557c1c9e2bc7e6526a4f050791e73794284068484f13cf977f09c648"`
Dec 19 12:12:00.910 INFO [stderr]     Checking blaise v0.1.0 (/opt/crater/workdir)
Dec 19 12:12:01.865 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
Dec 19 12:12:01.865 INFO [stderr]    --> src/interpreter/builtin.rs:106:27
Dec 19 12:12:01.866 INFO [stderr]     |
Dec 19 12:12:01.866 INFO [stderr] 106 |             let buf = buf.trim_right_matches("\r\n");
Dec 19 12:12:01.866 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^
Dec 19 12:12:01.867 INFO [stderr]     |
Dec 19 12:12:01.867 INFO [stderr]     = note: #[warn(deprecated)] on by default
Dec 19 12:12:01.867 INFO [stderr] 
Dec 19 12:12:02.264 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
Dec 19 12:12:02.265 INFO [stderr]    --> src/interpreter/builtin.rs:106:27
Dec 19 12:12:02.265 INFO [stderr]     |
Dec 19 12:12:02.265 INFO [stderr] 106 |             let buf = buf.trim_right_matches("\r\n");
Dec 19 12:12:02.266 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^
Dec 19 12:12:02.266 INFO [stderr]     |
Dec 19 12:12:02.266 INFO [stderr]     = note: #[warn(deprecated)] on by default
Dec 19 12:12:02.266 INFO [stderr] 
Dec 19 12:12:03.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.509 INFO [stderr]   --> src/colors.rs:52:13
Dec 19 12:12:03.509 INFO [stderr]    |
Dec 19 12:12:03.509 INFO [stderr] 52 |             write!(buf, "{}", data.as_ref());
Dec 19 12:12:03.509 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:03.510 INFO [stderr]    |
Dec 19 12:12:03.510 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:12:03.510 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.510 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.511 INFO [stderr] 
Dec 19 12:12:03.511 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.511 INFO [stderr]   --> src/colors.rs:60:9
Dec 19 12:12:03.511 INFO [stderr]    |
Dec 19 12:12:03.512 INFO [stderr] 60 |         write!(buf, "{}", data.as_ref());
Dec 19 12:12:03.512 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:03.512 INFO [stderr]    |
Dec 19 12:12:03.512 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.513 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.513 INFO [stderr] 
Dec 19 12:12:03.513 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.513 INFO [stderr]   --> src/parser/error.rs:40:9
Dec 19 12:12:03.513 INFO [stderr]    |
Dec 19 12:12:03.514 INFO [stderr] 40 |         writeln!(w, "{}", data);
Dec 19 12:12:03.514 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:03.514 INFO [stderr]    |
Dec 19 12:12:03.514 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.515 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.515 INFO [stderr] 
Dec 19 12:12:03.515 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.515 INFO [stderr]   --> src/parser/error.rs:42:9
Dec 19 12:12:03.515 INFO [stderr]    |
Dec 19 12:12:03.516 INFO [stderr] 42 |         writeln!(w);
Dec 19 12:12:03.516 INFO [stderr]    |         ^^^^^^^^^^^^
Dec 19 12:12:03.516 INFO [stderr]    |
Dec 19 12:12:03.516 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.517 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.517 INFO [stderr] 
Dec 19 12:12:03.517 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.517 INFO [stderr]   --> src/parser/error.rs:45:9
Dec 19 12:12:03.518 INFO [stderr]    |
Dec 19 12:12:03.518 INFO [stderr] 45 |         write!(w, ":");
Dec 19 12:12:03.518 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 19 12:12:03.518 INFO [stderr]    |
Dec 19 12:12:03.519 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.519 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.519 INFO [stderr] 
Dec 19 12:12:03.519 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.519 INFO [stderr]   --> src/parser/error.rs:51:17
Dec 19 12:12:03.520 INFO [stderr]    |
Dec 19 12:12:03.520 INFO [stderr] 51 |                 write!(w, "{}", reason);
Dec 19 12:12:03.520 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:03.520 INFO [stderr]    |
Dec 19 12:12:03.521 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.521 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.521 INFO [stderr] 
Dec 19 12:12:03.521 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.522 INFO [stderr]   --> src/parser/error.rs:73:17
Dec 19 12:12:03.522 INFO [stderr]    |
Dec 19 12:12:03.522 INFO [stderr] 73 |                 write!(w, " got ");
Dec 19 12:12:03.522 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:03.522 INFO [stderr]    |
Dec 19 12:12:03.522 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.522 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.522 INFO [stderr] 
Dec 19 12:12:03.522 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:03.522 INFO [stderr]   --> src/parser/error.rs:81:9
Dec 19 12:12:03.522 INFO [stderr]    |
Dec 19 12:12:03.522 INFO [stderr] 81 |         writeln!(w);
Dec 19 12:12:03.522 INFO [stderr]    |         ^^^^^^^^^^^^
Dec 19 12:12:03.522 INFO [stderr]    |
Dec 19 12:12:03.522 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:03.522 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:03.522 INFO [stderr] 
Dec 19 12:12:04.052 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.052 INFO [stderr]   --> src/bin/blaise.rs:55:9
Dec 19 12:12:04.052 INFO [stderr]    |
Dec 19 12:12:04.052 INFO [stderr] 55 |         writeln!(writer, "{}\n", input);
Dec 19 12:12:04.052 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.052 INFO [stderr]    |
Dec 19 12:12:04.052 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:12:04.052 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.052 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.052 INFO [stderr] 
Dec 19 12:12:04.052 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.053 INFO [stderr]   --> src/bin/blaise.rs:64:9
Dec 19 12:12:04.053 INFO [stderr]    |
Dec 19 12:12:04.053 INFO [stderr] 64 |         writeln!(writer, "{}", tokens);
Dec 19 12:12:04.054 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.054 INFO [stderr]    |
Dec 19 12:12:04.054 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.054 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.055 INFO [stderr] 
Dec 19 12:12:04.055 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.055 INFO [stderr]   --> src/bin/blaise.rs:85:9
Dec 19 12:12:04.055 INFO [stderr]    |
Dec 19 12:12:04.055 INFO [stderr] 85 |         writeln!(writer);
Dec 19 12:12:04.056 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.056 INFO [stderr]    |
Dec 19 12:12:04.056 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.056 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.057 INFO [stderr] 
Dec 19 12:12:04.057 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.057 INFO [stderr]   --> src/bin/blaise.rs:91:9
Dec 19 12:12:04.057 INFO [stderr]    |
Dec 19 12:12:04.057 INFO [stderr] 91 |         writeln!(writer, "{:#?}", program);
Dec 19 12:12:04.058 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.058 INFO [stderr]    |
Dec 19 12:12:04.058 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.058 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.059 INFO [stderr] 
Dec 19 12:12:04.059 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.059 INFO [stderr]    --> src/bin/blaise.rs:101:13
Dec 19 12:12:04.059 INFO [stderr]     |
Dec 19 12:12:04.060 INFO [stderr] 101 |             writeln!(writer, "{:?}", res);
Dec 19 12:12:04.060 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.060 INFO [stderr]     |
Dec 19 12:12:04.060 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.061 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.061 INFO [stderr] 
Dec 19 12:12:04.306 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.306 INFO [stderr]   --> src/bin/blaise.rs:55:9
Dec 19 12:12:04.306 INFO [stderr]    |
Dec 19 12:12:04.306 INFO [stderr] 55 |         writeln!(writer, "{}\n", input);
Dec 19 12:12:04.306 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.307 INFO [stderr]    |
Dec 19 12:12:04.307 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:12:04.307 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.308 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.308 INFO [stderr] 
Dec 19 12:12:04.308 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.309 INFO [stderr]   --> src/bin/blaise.rs:64:9
Dec 19 12:12:04.309 INFO [stderr]    |
Dec 19 12:12:04.309 INFO [stderr] 64 |         writeln!(writer, "{}", tokens);
Dec 19 12:12:04.309 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.310 INFO [stderr]    |
Dec 19 12:12:04.310 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.310 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.310 INFO [stderr] 
Dec 19 12:12:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.311 INFO [stderr]   --> src/bin/blaise.rs:85:9
Dec 19 12:12:04.311 INFO [stderr]    |
Dec 19 12:12:04.312 INFO [stderr] 85 |         writeln!(writer);
Dec 19 12:12:04.312 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.312 INFO [stderr]    |
Dec 19 12:12:04.312 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.313 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.313 INFO [stderr] 
Dec 19 12:12:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.314 INFO [stderr]   --> src/bin/blaise.rs:91:9
Dec 19 12:12:04.314 INFO [stderr]    |
Dec 19 12:12:04.314 INFO [stderr] 91 |         writeln!(writer, "{:#?}", program);
Dec 19 12:12:04.314 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.315 INFO [stderr]    |
Dec 19 12:12:04.315 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.315 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.316 INFO [stderr] 
Dec 19 12:12:04.324 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.325 INFO [stderr]    --> src/bin/blaise.rs:101:13
Dec 19 12:12:04.325 INFO [stderr]     |
Dec 19 12:12:04.325 INFO [stderr] 101 |             writeln!(writer, "{:?}", res);
Dec 19 12:12:04.325 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.326 INFO [stderr]     |
Dec 19 12:12:04.326 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.326 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.327 INFO [stderr] 
Dec 19 12:12:04.521 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.521 INFO [stderr]   --> src/colors.rs:52:13
Dec 19 12:12:04.521 INFO [stderr]    |
Dec 19 12:12:04.522 INFO [stderr] 52 |             write!(buf, "{}", data.as_ref());
Dec 19 12:12:04.522 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.522 INFO [stderr]    |
Dec 19 12:12:04.522 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:12:04.523 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.523 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.523 INFO [stderr] 
Dec 19 12:12:04.523 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.524 INFO [stderr]   --> src/colors.rs:60:9
Dec 19 12:12:04.524 INFO [stderr]    |
Dec 19 12:12:04.524 INFO [stderr] 60 |         write!(buf, "{}", data.as_ref());
Dec 19 12:12:04.524 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.525 INFO [stderr]    |
Dec 19 12:12:04.525 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.525 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.525 INFO [stderr] 
Dec 19 12:12:04.532 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.533 INFO [stderr]   --> src/parser/error.rs:40:9
Dec 19 12:12:04.533 INFO [stderr]    |
Dec 19 12:12:04.533 INFO [stderr] 40 |         writeln!(w, "{}", data);
Dec 19 12:12:04.533 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.534 INFO [stderr]    |
Dec 19 12:12:04.534 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.534 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.534 INFO [stderr] 
Dec 19 12:12:04.534 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.535 INFO [stderr]   --> src/parser/error.rs:42:9
Dec 19 12:12:04.535 INFO [stderr]    |
Dec 19 12:12:04.535 INFO [stderr] 42 |         writeln!(w);
Dec 19 12:12:04.535 INFO [stderr]    |         ^^^^^^^^^^^^
Dec 19 12:12:04.535 INFO [stderr]    |
Dec 19 12:12:04.536 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.536 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.536 INFO [stderr] 
Dec 19 12:12:04.536 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.536 INFO [stderr]   --> src/parser/error.rs:45:9
Dec 19 12:12:04.537 INFO [stderr]    |
Dec 19 12:12:04.537 INFO [stderr] 45 |         write!(w, ":");
Dec 19 12:12:04.537 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 19 12:12:04.537 INFO [stderr]    |
Dec 19 12:12:04.538 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.538 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.538 INFO [stderr] 
Dec 19 12:12:04.538 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.539 INFO [stderr]   --> src/parser/error.rs:51:17
Dec 19 12:12:04.539 INFO [stderr]    |
Dec 19 12:12:04.539 INFO [stderr] 51 |                 write!(w, "{}", reason);
Dec 19 12:12:04.539 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.539 INFO [stderr]    |
Dec 19 12:12:04.540 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.540 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.540 INFO [stderr] 
Dec 19 12:12:04.540 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.540 INFO [stderr]   --> src/parser/error.rs:73:17
Dec 19 12:12:04.541 INFO [stderr]    |
Dec 19 12:12:04.541 INFO [stderr] 73 |                 write!(w, " got ");
Dec 19 12:12:04.541 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^
Dec 19 12:12:04.541 INFO [stderr]    |
Dec 19 12:12:04.542 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.542 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.542 INFO [stderr] 
Dec 19 12:12:04.542 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:12:04.542 INFO [stderr]   --> src/parser/error.rs:81:9
Dec 19 12:12:04.543 INFO [stderr]    |
Dec 19 12:12:04.543 INFO [stderr] 81 |         writeln!(w);
Dec 19 12:12:04.543 INFO [stderr]    |         ^^^^^^^^^^^^
Dec 19 12:12:04.543 INFO [stderr]    |
Dec 19 12:12:04.544 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:12:04.544 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 12:12:04.544 INFO [stderr] 
Dec 19 12:12:04.637 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.79s
Dec 19 12:12:05.376 INFO running `"docker" "inspect" "b9e8595a557c1c9e2bc7e6526a4f050791e73794284068484f13cf977f09c648"`
Dec 19 12:12:05.667 INFO running `"docker" "rm" "-f" "b9e8595a557c1c9e2bc7e6526a4f050791e73794284068484f13cf977f09c648"`
Dec 19 12:12:05.890 INFO [stdout] b9e8595a557c1c9e2bc7e6526a4f050791e73794284068484f13cf977f09c648