Nov 29 03:04:30.410 INFO checking comacro-0.0.1 against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 29 03:04:30.410 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-6/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +db42d4dad33013eba11ef37342ad9f614e5652b8-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 29 03:04:30.953 INFO [stdout] 86b8d947669fccb99c47b70b37ad080848ec25e7850d4e3c29138b41643d8626
Nov 29 03:04:30.956 INFO running `"docker" "start" "-a" "86b8d947669fccb99c47b70b37ad080848ec25e7850d4e3c29138b41643d8626"`
Nov 29 03:04:32.280 INFO [stderr] usermod: no changes
Nov 29 03:04:32.447 INFO [stderr]     Checking log v0.4.6
Nov 29 03:04:32.452 INFO [stderr]     Checking syn v0.15.22
Nov 29 03:04:34.060 INFO [stderr]     Checking env_logger v0.5.13
Nov 29 03:04:42.208 INFO [stderr]     Checking comacro v0.0.1 (/source)
Nov 29 03:04:48.604 INFO [stderr] warning: unnecessary parentheses around pattern
Nov 29 03:04:48.604 INFO [stderr]   --> src/trace.rs:84:21
Nov 29 03:04:48.604 INFO [stderr]    |
Nov 29 03:04:48.604 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Nov 29 03:04:48.604 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Nov 29 03:04:48.604 INFO [stderr]    |
Nov 29 03:04:48.604 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 29 03:04:48.604 INFO [stderr] 
Nov 29 03:04:49.028 INFO [stderr] warning: unused variable: `x`
Nov 29 03:04:49.028 INFO [stderr]    --> src/repr.rs:270:29
Nov 29 03:04:49.028 INFO [stderr]     |
Nov 29 03:04:49.028 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Nov 29 03:04:49.028 INFO [stderr]     |                             ^ help: consider using `_x` instead
Nov 29 03:04:49.028 INFO [stderr]     |
Nov 29 03:04:49.028 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 29 03:04:49.028 INFO [stderr] 
Nov 29 03:04:49.028 INFO [stderr] warning: unused variable: `x`
Nov 29 03:04:49.028 INFO [stderr]    --> src/repr.rs:271:32
Nov 29 03:04:49.028 INFO [stderr]     |
Nov 29 03:04:49.028 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Nov 29 03:04:49.028 INFO [stderr]     |                                ^ help: consider using `_x` instead
Nov 29 03:04:49.028 INFO [stderr] 
Nov 29 03:04:49.192 INFO [stderr] warning: unnecessary parentheses around pattern
Nov 29 03:04:49.192 INFO [stderr]   --> src/trace.rs:84:21
Nov 29 03:04:49.192 INFO [stderr]    |
Nov 29 03:04:49.192 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Nov 29 03:04:49.192 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Nov 29 03:04:49.192 INFO [stderr]    |
Nov 29 03:04:49.192 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 29 03:04:49.192 INFO [stderr] 
Nov 29 03:04:49.192 INFO [stderr] warning: variant is never constructed: `Cont`
Nov 29 03:04:49.192 INFO [stderr]   --> src/tokens.rs:18:5
Nov 29 03:04:49.192 INFO [stderr]    |
Nov 29 03:04:49.192 INFO [stderr] 18 |     Cont,
Nov 29 03:04:49.192 INFO [stderr]    |     ^^^^
Nov 29 03:04:49.192 INFO [stderr]    |
Nov 29 03:04:49.192 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 29 03:04:49.192 INFO [stderr] 
Nov 29 03:04:49.196 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:41:9
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Nov 29 03:04:49.197 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:47:9
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Nov 29 03:04:49.197 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:53:9
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Nov 29 03:04:49.197 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:59:9
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Nov 29 03:04:49.197 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:65:9
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 65 |         write!(self.buf, "}}");
Nov 29 03:04:49.197 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:71:13
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 71 |             write!(self.buf, "\n");
Nov 29 03:04:49.197 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]   --> src/repr.rs:90:9
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr] 90 |         write!(buf, "[");
Nov 29 03:04:49.197 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]    |
Nov 29 03:04:49.197 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]    --> src/repr.rs:113:13
Nov 29 03:04:49.197 INFO [stderr]     |
Nov 29 03:04:49.197 INFO [stderr] 113 |             write!(self.buf, "]");
Nov 29 03:04:49.197 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]     |
Nov 29 03:04:49.197 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]    --> src/repr.rs:120:9
Nov 29 03:04:49.197 INFO [stderr]     |
Nov 29 03:04:49.197 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Nov 29 03:04:49.197 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.197 INFO [stderr]     |
Nov 29 03:04:49.197 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.197 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)
Nov 29 03:04:49.197 INFO [stderr] 
Nov 29 03:04:49.197 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.197 INFO [stderr]    --> src/repr.rs:126:9
Nov 29 03:04:49.197 INFO [stderr]     |
Nov 29 03:04:49.197 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Nov 29 03:04:49.198 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.198 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)
Nov 29 03:04:49.198 INFO [stderr] 
Nov 29 03:04:49.198 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.198 INFO [stderr]    --> src/repr.rs:132:9
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Nov 29 03:04:49.198 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.198 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)
Nov 29 03:04:49.198 INFO [stderr] 
Nov 29 03:04:49.198 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.198 INFO [stderr]    --> src/repr.rs:138:9
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Nov 29 03:04:49.198 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.198 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)
Nov 29 03:04:49.198 INFO [stderr] 
Nov 29 03:04:49.198 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:49.198 INFO [stderr]    --> src/repr.rs:143:9
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr] 143 |         write!(self.buf, "]");
Nov 29 03:04:49.198 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:49.198 INFO [stderr]     |
Nov 29 03:04:49.198 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:49.198 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)
Nov 29 03:04:49.198 INFO [stderr] 
Nov 29 03:04:50.176 INFO [stderr] warning: unused variable: `x`
Nov 29 03:04:50.176 INFO [stderr]    --> src/repr.rs:270:29
Nov 29 03:04:50.176 INFO [stderr]     |
Nov 29 03:04:50.176 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Nov 29 03:04:50.176 INFO [stderr]     |                             ^ help: consider using `_x` instead
Nov 29 03:04:50.176 INFO [stderr]     |
Nov 29 03:04:50.176 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 29 03:04:50.176 INFO [stderr] 
Nov 29 03:04:50.176 INFO [stderr] warning: unused variable: `x`
Nov 29 03:04:50.176 INFO [stderr]    --> src/repr.rs:271:32
Nov 29 03:04:50.176 INFO [stderr]     |
Nov 29 03:04:50.176 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Nov 29 03:04:50.176 INFO [stderr]     |                                ^ help: consider using `_x` instead
Nov 29 03:04:50.176 INFO [stderr] 
Nov 29 03:04:50.600 INFO [stderr] warning: variant is never constructed: `Cont`
Nov 29 03:04:50.600 INFO [stderr]   --> src/tokens.rs:18:5
Nov 29 03:04:50.600 INFO [stderr]    |
Nov 29 03:04:50.600 INFO [stderr] 18 |     Cont,
Nov 29 03:04:50.600 INFO [stderr]    |     ^^^^
Nov 29 03:04:50.600 INFO [stderr]    |
Nov 29 03:04:50.600 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 29 03:04:50.600 INFO [stderr] 
Nov 29 03:04:50.600 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.600 INFO [stderr]   --> src/repr.rs:41:9
Nov 29 03:04:50.600 INFO [stderr]    |
Nov 29 03:04:50.600 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Nov 29 03:04:50.600 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.600 INFO [stderr]    |
Nov 29 03:04:50.600 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 29 03:04:50.600 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.600 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)
Nov 29 03:04:50.600 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]   --> src/repr.rs:47:9
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Nov 29 03:04:50.609 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]   --> src/repr.rs:53:9
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Nov 29 03:04:50.609 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]   --> src/repr.rs:59:9
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Nov 29 03:04:50.609 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]   --> src/repr.rs:65:9
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr] 65 |         write!(self.buf, "}}");
Nov 29 03:04:50.609 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]   --> src/repr.rs:71:13
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr] 71 |             write!(self.buf, "\n");
Nov 29 03:04:50.609 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]   --> src/repr.rs:90:9
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr] 90 |         write!(buf, "[");
Nov 29 03:04:50.609 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]    |
Nov 29 03:04:50.609 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]    --> src/repr.rs:113:13
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr] 113 |             write!(self.buf, "]");
Nov 29 03:04:50.609 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]    --> src/repr.rs:120:9
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Nov 29 03:04:50.609 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]    --> src/repr.rs:126:9
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Nov 29 03:04:50.609 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.609 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)
Nov 29 03:04:50.609 INFO [stderr] 
Nov 29 03:04:50.609 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.609 INFO [stderr]    --> src/repr.rs:132:9
Nov 29 03:04:50.609 INFO [stderr]     |
Nov 29 03:04:50.609 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Nov 29 03:04:50.609 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.610 INFO [stderr]     |
Nov 29 03:04:50.610 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.610 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)
Nov 29 03:04:50.610 INFO [stderr] 
Nov 29 03:04:50.610 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.610 INFO [stderr]    --> src/repr.rs:138:9
Nov 29 03:04:50.610 INFO [stderr]     |
Nov 29 03:04:50.610 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Nov 29 03:04:50.610 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.610 INFO [stderr]     |
Nov 29 03:04:50.610 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.610 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)
Nov 29 03:04:50.610 INFO [stderr] 
Nov 29 03:04:50.610 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 29 03:04:50.610 INFO [stderr]    --> src/repr.rs:143:9
Nov 29 03:04:50.610 INFO [stderr]     |
Nov 29 03:04:50.610 INFO [stderr] 143 |         write!(self.buf, "]");
Nov 29 03:04:50.610 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Nov 29 03:04:50.610 INFO [stderr]     |
Nov 29 03:04:50.610 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 29 03:04:50.610 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)
Nov 29 03:04:50.610 INFO [stderr] 
Nov 29 03:04:55.000 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.71s
Nov 29 03:04:55.018 INFO [stderr] su: No module specific data is present
Nov 29 03:04:56.016 INFO running `"docker" "inspect" "86b8d947669fccb99c47b70b37ad080848ec25e7850d4e3c29138b41643d8626"`
Nov 29 03:04:56.294 INFO running `"docker" "rm" "-f" "86b8d947669fccb99c47b70b37ad080848ec25e7850d4e3c29138b41643d8626"`
Nov 29 03:04:56.515 INFO [stdout] 86b8d947669fccb99c47b70b37ad080848ec25e7850d4e3c29138b41643d8626