Dec 18 17:26:45.914 INFO checking comacro-0.0.1 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 17:26:45.915 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/comacro/0.0.1:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 17:26:46.365 INFO [stdout] 0b33a9d710bfedced022436d339a457bc1b1ff6614895b014090fab8a300fd4c
Dec 18 17:26:46.370 INFO running `"docker" "start" "-a" "0b33a9d710bfedced022436d339a457bc1b1ff6614895b014090fab8a300fd4c"`
Dec 18 17:26:47.332 INFO [stderr]     Checking log v0.4.6
Dec 18 17:26:47.332 INFO [stderr]     Checking syn v0.15.23
Dec 18 17:26:47.834 INFO [stderr]     Checking env_logger v0.5.13
Dec 18 17:26:51.635 INFO [stderr]     Checking comacro v0.0.1 (/opt/crater/workdir)
Dec 18 17:26:52.000 INFO [stderr] warning: unnecessary parentheses around pattern
Dec 18 17:26:52.000 INFO [stderr]   --> src/trace.rs:84:21
Dec 18 17:26:52.000 INFO [stderr]    |
Dec 18 17:26:52.000 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Dec 18 17:26:52.000 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Dec 18 17:26:52.000 INFO [stderr]    |
Dec 18 17:26:52.000 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 18 17:26:52.000 INFO [stderr] 
Dec 18 17:26:52.140 INFO [stderr] warning: unnecessary parentheses around pattern
Dec 18 17:26:52.140 INFO [stderr]   --> src/trace.rs:84:21
Dec 18 17:26:52.140 INFO [stderr]    |
Dec 18 17:26:52.140 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Dec 18 17:26:52.140 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Dec 18 17:26:52.140 INFO [stderr]    |
Dec 18 17:26:52.140 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 18 17:26:52.140 INFO [stderr] 
Dec 18 17:26:52.140 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 18 17:26:52.140 INFO [stderr]   --> src/matchcode.rs:58:22
Dec 18 17:26:52.140 INFO [stderr]    |
Dec 18 17:26:52.140 INFO [stderr] 58 |         let x_id = x.trim_left_matches("IDENT_");
Dec 18 17:26:52.140 INFO [stderr]    |                      ^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.140 INFO [stderr]    |
Dec 18 17:26:52.140 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 18 17:26:52.140 INFO [stderr] 
Dec 18 17:26:52.140 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 18 17:26:52.140 INFO [stderr]   --> src/matchcode.rs:59:24
Dec 18 17:26:52.140 INFO [stderr]    |
Dec 18 17:26:52.140 INFO [stderr] 59 |         let x_expr = x.trim_left_matches("EXPR_");
Dec 18 17:26:52.140 INFO [stderr]    |                        ^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.140 INFO [stderr] 
Dec 18 17:26:52.308 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 18 17:26:52.308 INFO [stderr]   --> src/matchcode.rs:58:22
Dec 18 17:26:52.308 INFO [stderr]    |
Dec 18 17:26:52.308 INFO [stderr] 58 |         let x_id = x.trim_left_matches("IDENT_");
Dec 18 17:26:52.308 INFO [stderr]    |                      ^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.308 INFO [stderr]    |
Dec 18 17:26:52.308 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 18 17:26:52.308 INFO [stderr] 
Dec 18 17:26:52.308 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 18 17:26:52.308 INFO [stderr]   --> src/matchcode.rs:59:24
Dec 18 17:26:52.308 INFO [stderr]    |
Dec 18 17:26:52.308 INFO [stderr] 59 |         let x_expr = x.trim_left_matches("EXPR_");
Dec 18 17:26:52.308 INFO [stderr]    |                        ^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.308 INFO [stderr] 
Dec 18 17:26:52.355 INFO [stderr] warning: unused variable: `x`
Dec 18 17:26:52.355 INFO [stderr]    --> src/repr.rs:270:29
Dec 18 17:26:52.355 INFO [stderr]     |
Dec 18 17:26:52.355 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Dec 18 17:26:52.355 INFO [stderr]     |                             ^ help: consider using `_x` instead
Dec 18 17:26:52.355 INFO [stderr]     |
Dec 18 17:26:52.355 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 17:26:52.355 INFO [stderr] 
Dec 18 17:26:52.355 INFO [stderr] warning: unused variable: `x`
Dec 18 17:26:52.355 INFO [stderr]    --> src/repr.rs:271:32
Dec 18 17:26:52.355 INFO [stderr]     |
Dec 18 17:26:52.355 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Dec 18 17:26:52.355 INFO [stderr]     |                                ^ help: consider using `_x` instead
Dec 18 17:26:52.355 INFO [stderr] 
Dec 18 17:26:52.503 INFO [stderr] warning: variant is never constructed: `Cont`
Dec 18 17:26:52.503 INFO [stderr]   --> src/tokens.rs:18:5
Dec 18 17:26:52.503 INFO [stderr]    |
Dec 18 17:26:52.503 INFO [stderr] 18 |     Cont,
Dec 18 17:26:52.503 INFO [stderr]    |     ^^^^
Dec 18 17:26:52.503 INFO [stderr]    |
Dec 18 17:26:52.503 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 17:26:52.503 INFO [stderr] 
Dec 18 17:26:52.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.508 INFO [stderr]   --> src/repr.rs:41:9
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Dec 18 17:26:52.508 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 17:26:52.508 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.508 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 18 17:26:52.508 INFO [stderr] 
Dec 18 17:26:52.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.508 INFO [stderr]   --> src/repr.rs:47:9
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Dec 18 17:26:52.508 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.508 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 18 17:26:52.508 INFO [stderr] 
Dec 18 17:26:52.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.508 INFO [stderr]   --> src/repr.rs:53:9
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Dec 18 17:26:52.508 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.508 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 18 17:26:52.508 INFO [stderr] 
Dec 18 17:26:52.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.508 INFO [stderr]   --> src/repr.rs:59:9
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Dec 18 17:26:52.508 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.508 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 18 17:26:52.508 INFO [stderr] 
Dec 18 17:26:52.508 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.508 INFO [stderr]   --> src/repr.rs:65:9
Dec 18 17:26:52.508 INFO [stderr]    |
Dec 18 17:26:52.508 INFO [stderr] 65 |         write!(self.buf, "}}");
Dec 18 17:26:52.508 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.509 INFO [stderr]    |
Dec 18 17:26:52.509 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.509 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 18 17:26:52.509 INFO [stderr] 
Dec 18 17:26:52.509 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.509 INFO [stderr]   --> src/repr.rs:71:13
Dec 18 17:26:52.509 INFO [stderr]    |
Dec 18 17:26:52.509 INFO [stderr] 71 |             write!(self.buf, "\n");
Dec 18 17:26:52.509 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.509 INFO [stderr]    |
Dec 18 17:26:52.516 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]   --> src/repr.rs:90:9
Dec 18 17:26:52.516 INFO [stderr]    |
Dec 18 17:26:52.516 INFO [stderr] 90 |         write!(buf, "[");
Dec 18 17:26:52.516 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.516 INFO [stderr]    |
Dec 18 17:26:52.516 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]    --> src/repr.rs:113:13
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr] 113 |             write!(self.buf, "]");
Dec 18 17:26:52.516 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]    --> src/repr.rs:120:9
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Dec 18 17:26:52.516 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]    --> src/repr.rs:126:9
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Dec 18 17:26:52.516 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]    --> src/repr.rs:132:9
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Dec 18 17:26:52.516 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]    --> src/repr.rs:138:9
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Dec 18 17:26:52.516 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.516 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.516 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 18 17:26:52.516 INFO [stderr] 
Dec 18 17:26:52.516 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.516 INFO [stderr]    --> src/repr.rs:143:9
Dec 18 17:26:52.516 INFO [stderr]     |
Dec 18 17:26:52.517 INFO [stderr] 143 |         write!(self.buf, "]");
Dec 18 17:26:52.517 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.517 INFO [stderr]     |
Dec 18 17:26:52.517 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.517 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 18 17:26:52.517 INFO [stderr] 
Dec 18 17:26:52.567 INFO [stderr] warning: unused variable: `x`
Dec 18 17:26:52.567 INFO [stderr]    --> src/repr.rs:270:29
Dec 18 17:26:52.567 INFO [stderr]     |
Dec 18 17:26:52.567 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Dec 18 17:26:52.567 INFO [stderr]     |                             ^ help: consider using `_x` instead
Dec 18 17:26:52.567 INFO [stderr]     |
Dec 18 17:26:52.567 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 17:26:52.567 INFO [stderr] 
Dec 18 17:26:52.567 INFO [stderr] warning: unused variable: `x`
Dec 18 17:26:52.567 INFO [stderr]    --> src/repr.rs:271:32
Dec 18 17:26:52.567 INFO [stderr]     |
Dec 18 17:26:52.567 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Dec 18 17:26:52.567 INFO [stderr]     |                                ^ help: consider using `_x` instead
Dec 18 17:26:52.567 INFO [stderr] 
Dec 18 17:26:52.732 INFO [stderr] warning: variant is never constructed: `Cont`
Dec 18 17:26:52.732 INFO [stderr]   --> src/tokens.rs:18:5
Dec 18 17:26:52.732 INFO [stderr]    |
Dec 18 17:26:52.732 INFO [stderr] 18 |     Cont,
Dec 18 17:26:52.732 INFO [stderr]    |     ^^^^
Dec 18 17:26:52.732 INFO [stderr]    |
Dec 18 17:26:52.732 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 17:26:52.732 INFO [stderr] 
Dec 18 17:26:52.732 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.732 INFO [stderr]   --> src/repr.rs:41:9
Dec 18 17:26:52.732 INFO [stderr]    |
Dec 18 17:26:52.732 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Dec 18 17:26:52.732 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.732 INFO [stderr]    |
Dec 18 17:26:52.732 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 17:26:52.732 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.732 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 18 17:26:52.732 INFO [stderr] 
Dec 18 17:26:52.732 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.740 INFO [stderr]   --> src/repr.rs:47:9
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Dec 18 17:26:52.740 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.740 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 18 17:26:52.740 INFO [stderr] 
Dec 18 17:26:52.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.740 INFO [stderr]   --> src/repr.rs:53:9
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Dec 18 17:26:52.740 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.740 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 18 17:26:52.740 INFO [stderr] 
Dec 18 17:26:52.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.740 INFO [stderr]   --> src/repr.rs:59:9
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Dec 18 17:26:52.740 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.740 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 18 17:26:52.740 INFO [stderr] 
Dec 18 17:26:52.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.740 INFO [stderr]   --> src/repr.rs:65:9
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr] 65 |         write!(self.buf, "}}");
Dec 18 17:26:52.740 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.740 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 18 17:26:52.740 INFO [stderr] 
Dec 18 17:26:52.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.740 INFO [stderr]   --> src/repr.rs:71:13
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr] 71 |             write!(self.buf, "\n");
Dec 18 17:26:52.740 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.740 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 18 17:26:52.740 INFO [stderr] 
Dec 18 17:26:52.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.740 INFO [stderr]   --> src/repr.rs:90:9
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr] 90 |         write!(buf, "[");
Dec 18 17:26:52.740 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.740 INFO [stderr]    |
Dec 18 17:26:52.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.740 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 18 17:26:52.740 INFO [stderr] 
Dec 18 17:26:52.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.741 INFO [stderr]    --> src/repr.rs:113:13
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr] 113 |             write!(self.buf, "]");
Dec 18 17:26:52.741 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.741 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 18 17:26:52.741 INFO [stderr] 
Dec 18 17:26:52.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.741 INFO [stderr]    --> src/repr.rs:120:9
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Dec 18 17:26:52.741 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.741 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 18 17:26:52.741 INFO [stderr] 
Dec 18 17:26:52.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.741 INFO [stderr]    --> src/repr.rs:126:9
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Dec 18 17:26:52.741 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.741 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 18 17:26:52.741 INFO [stderr] 
Dec 18 17:26:52.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.741 INFO [stderr]    --> src/repr.rs:132:9
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Dec 18 17:26:52.741 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.741 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 18 17:26:52.741 INFO [stderr] 
Dec 18 17:26:52.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.741 INFO [stderr]    --> src/repr.rs:138:9
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Dec 18 17:26:52.741 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.741 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 18 17:26:52.741 INFO [stderr] 
Dec 18 17:26:52.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:26:52.741 INFO [stderr]    --> src/repr.rs:143:9
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr] 143 |         write!(self.buf, "]");
Dec 18 17:26:52.741 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:26:52.741 INFO [stderr]     |
Dec 18 17:26:52.741 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:26:52.741 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 18 17:26:52.741 INFO [stderr] 
Dec 18 17:26:53.284 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.01s
Dec 18 17:26:53.629 INFO running `"docker" "inspect" "0b33a9d710bfedced022436d339a457bc1b1ff6614895b014090fab8a300fd4c"`
Dec 18 17:26:53.817 INFO running `"docker" "rm" "-f" "0b33a9d710bfedced022436d339a457bc1b1ff6614895b014090fab8a300fd4c"`
Dec 18 17:26:53.941 INFO [stdout] 0b33a9d710bfedced022436d339a457bc1b1ff6614895b014090fab8a300fd4c