Dec 15 18:28:47.634 INFO testing comacro-0.0.1 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 18:28:47.634 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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"`
Dec 15 18:28:47.846 INFO [stdout] a8bcfac8e2cac9d06760b23edb51e7c50201523b2f3099713d62fd6090eb19a6
Dec 15 18:28:47.849 INFO running `"docker" "start" "-a" "a8bcfac8e2cac9d06760b23edb51e7c50201523b2f3099713d62fd6090eb19a6"`
Dec 15 18:28:48.365 INFO [stderr] usermod: no changes
Dec 15 18:28:48.449 INFO [stderr]    Compiling log v0.4.6
Dec 15 18:28:48.449 INFO [stderr]    Compiling syn v0.15.22
Dec 15 18:29:00.047 INFO [stderr]    Compiling comacro v0.0.1 (/source)
Dec 15 18:29:01.012 INFO [stderr] warning: unnecessary parentheses around pattern
Dec 15 18:29:01.012 INFO [stderr]   --> src/trace.rs:84:21
Dec 15 18:29:01.012 INFO [stderr]    |
Dec 15 18:29:01.012 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Dec 15 18:29:01.012 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Dec 15 18:29:01.012 INFO [stderr]    |
Dec 15 18:29:01.012 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 15 18:29:01.012 INFO [stderr] 
Dec 15 18:29:01.378 INFO [stderr] warning: unused variable: `x`
Dec 15 18:29:01.379 INFO [stderr]    --> src/repr.rs:270:29
Dec 15 18:29:01.379 INFO [stderr]     |
Dec 15 18:29:01.379 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Dec 15 18:29:01.379 INFO [stderr]     |                             ^ help: consider using `_x` instead
Dec 15 18:29:01.379 INFO [stderr]     |
Dec 15 18:29:01.379 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 15 18:29:01.379 INFO [stderr] 
Dec 15 18:29:01.379 INFO [stderr] warning: unused variable: `x`
Dec 15 18:29:01.379 INFO [stderr]    --> src/repr.rs:271:32
Dec 15 18:29:01.379 INFO [stderr]     |
Dec 15 18:29:01.379 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Dec 15 18:29:01.379 INFO [stderr]     |                                ^ help: consider using `_x` instead
Dec 15 18:29:01.379 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: variant is never constructed: `Cont`
Dec 15 18:29:01.559 INFO [stderr]   --> src/tokens.rs:18:5
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 18 |     Cont,
Dec 15 18:29:01.559 INFO [stderr]    |     ^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:41:9
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Dec 15 18:29:01.559 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:47:9
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Dec 15 18:29:01.559 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:53:9
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Dec 15 18:29:01.559 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:59:9
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Dec 15 18:29:01.559 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:65:9
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 65 |         write!(self.buf, "}}");
Dec 15 18:29:01.559 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:71:13
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 71 |             write!(self.buf, "\n");
Dec 15 18:29:01.559 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]   --> src/repr.rs:90:9
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr] 90 |         write!(buf, "[");
Dec 15 18:29:01.559 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]    |
Dec 15 18:29:01.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.559 INFO [stderr]    --> src/repr.rs:113:13
Dec 15 18:29:01.559 INFO [stderr]     |
Dec 15 18:29:01.559 INFO [stderr] 113 |             write!(self.buf, "]");
Dec 15 18:29:01.559 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.559 INFO [stderr]     |
Dec 15 18:29:01.559 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.559 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 15 18:29:01.559 INFO [stderr] 
Dec 15 18:29:01.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.560 INFO [stderr]    --> src/repr.rs:120:9
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Dec 15 18:29:01.560 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.560 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 15 18:29:01.560 INFO [stderr] 
Dec 15 18:29:01.560 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.560 INFO [stderr]    --> src/repr.rs:126:9
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Dec 15 18:29:01.560 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.560 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 15 18:29:01.560 INFO [stderr] 
Dec 15 18:29:01.560 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.560 INFO [stderr]    --> src/repr.rs:132:9
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Dec 15 18:29:01.560 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.560 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 15 18:29:01.560 INFO [stderr] 
Dec 15 18:29:01.560 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.560 INFO [stderr]    --> src/repr.rs:138:9
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Dec 15 18:29:01.560 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.560 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 15 18:29:01.560 INFO [stderr] 
Dec 15 18:29:01.560 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:01.560 INFO [stderr]    --> src/repr.rs:143:9
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr] 143 |         write!(self.buf, "]");
Dec 15 18:29:01.560 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:01.560 INFO [stderr]     |
Dec 15 18:29:01.560 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:01.560 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 15 18:29:01.560 INFO [stderr] 
Dec 15 18:29:06.512 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.13s
Dec 15 18:29:06.519 INFO [stderr] su: No module specific data is present
Dec 15 18:29:07.369 INFO running `"docker" "inspect" "a8bcfac8e2cac9d06760b23edb51e7c50201523b2f3099713d62fd6090eb19a6"`
Dec 15 18:29:07.619 INFO running `"docker" "rm" "-f" "a8bcfac8e2cac9d06760b23edb51e7c50201523b2f3099713d62fd6090eb19a6"`
Dec 15 18:29:07.887 INFO [stdout] a8bcfac8e2cac9d06760b23edb51e7c50201523b2f3099713d62fd6090eb19a6
Dec 15 18:29:07.899 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-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"`
Dec 15 18:29:08.367 INFO [stdout] 18163ba5ddfbdd980a1ed2990e112846cc72abcf2feab9401728b5b7467e2080
Dec 15 18:29:08.372 INFO running `"docker" "start" "-a" "18163ba5ddfbdd980a1ed2990e112846cc72abcf2feab9401728b5b7467e2080"`
Dec 15 18:29:09.661 INFO [stderr] usermod: no changes
Dec 15 18:29:09.791 INFO [stderr]    Compiling env_logger v0.5.13
Dec 15 18:29:13.203 INFO [stderr]    Compiling comacro v0.0.1 (/source)
Dec 15 18:29:14.303 INFO [stderr] warning: unnecessary parentheses around pattern
Dec 15 18:29:14.303 INFO [stderr]   --> src/trace.rs:84:21
Dec 15 18:29:14.303 INFO [stderr]    |
Dec 15 18:29:14.303 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Dec 15 18:29:14.303 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Dec 15 18:29:14.303 INFO [stderr]    |
Dec 15 18:29:14.303 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 15 18:29:14.303 INFO [stderr] 
Dec 15 18:29:14.669 INFO [stderr] warning: unused variable: `x`
Dec 15 18:29:14.691 INFO [stderr]    --> src/repr.rs:270:29
Dec 15 18:29:14.691 INFO [stderr]     |
Dec 15 18:29:14.691 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Dec 15 18:29:14.691 INFO [stderr]     |                             ^ help: consider using `_x` instead
Dec 15 18:29:14.691 INFO [stderr]     |
Dec 15 18:29:14.691 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 15 18:29:14.691 INFO [stderr] 
Dec 15 18:29:14.691 INFO [stderr] warning: unused variable: `x`
Dec 15 18:29:14.691 INFO [stderr]    --> src/repr.rs:271:32
Dec 15 18:29:14.691 INFO [stderr]     |
Dec 15 18:29:14.691 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Dec 15 18:29:14.691 INFO [stderr]     |                                ^ help: consider using `_x` instead
Dec 15 18:29:14.691 INFO [stderr] 
Dec 15 18:29:14.863 INFO [stderr] warning: variant is never constructed: `Cont`
Dec 15 18:29:14.863 INFO [stderr]   --> src/tokens.rs:18:5
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr] 18 |     Cont,
Dec 15 18:29:14.863 INFO [stderr]    |     ^^^^
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 18:29:14.863 INFO [stderr] 
Dec 15 18:29:14.863 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.863 INFO [stderr]   --> src/repr.rs:41:9
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Dec 15 18:29:14.863 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 15 18:29:14.863 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.863 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 15 18:29:14.863 INFO [stderr] 
Dec 15 18:29:14.863 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.863 INFO [stderr]   --> src/repr.rs:47:9
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Dec 15 18:29:14.863 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.863 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 15 18:29:14.863 INFO [stderr] 
Dec 15 18:29:14.863 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.863 INFO [stderr]   --> src/repr.rs:53:9
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Dec 15 18:29:14.863 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.863 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 15 18:29:14.863 INFO [stderr] 
Dec 15 18:29:14.863 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.863 INFO [stderr]   --> src/repr.rs:59:9
Dec 15 18:29:14.863 INFO [stderr]    |
Dec 15 18:29:14.863 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Dec 15 18:29:14.864 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.864 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 15 18:29:14.864 INFO [stderr] 
Dec 15 18:29:14.864 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.864 INFO [stderr]   --> src/repr.rs:65:9
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr] 65 |         write!(self.buf, "}}");
Dec 15 18:29:14.864 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.864 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 15 18:29:14.864 INFO [stderr] 
Dec 15 18:29:14.864 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.864 INFO [stderr]   --> src/repr.rs:71:13
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr] 71 |             write!(self.buf, "\n");
Dec 15 18:29:14.864 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.864 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 15 18:29:14.864 INFO [stderr] 
Dec 15 18:29:14.864 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.864 INFO [stderr]   --> src/repr.rs:90:9
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr] 90 |         write!(buf, "[");
Dec 15 18:29:14.864 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.864 INFO [stderr]    |
Dec 15 18:29:14.864 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.864 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 15 18:29:14.864 INFO [stderr] 
Dec 15 18:29:14.864 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.864 INFO [stderr]    --> src/repr.rs:113:13
Dec 15 18:29:14.864 INFO [stderr]     |
Dec 15 18:29:14.864 INFO [stderr] 113 |             write!(self.buf, "]");
Dec 15 18:29:14.864 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.864 INFO [stderr]     |
Dec 15 18:29:14.864 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.864 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 15 18:29:14.864 INFO [stderr] 
Dec 15 18:29:14.864 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.864 INFO [stderr]    --> src/repr.rs:120:9
Dec 15 18:29:14.864 INFO [stderr]     |
Dec 15 18:29:14.864 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Dec 15 18:29:14.864 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.864 INFO [stderr]     |
Dec 15 18:29:14.864 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.871 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 15 18:29:14.871 INFO [stderr] 
Dec 15 18:29:14.871 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.871 INFO [stderr]    --> src/repr.rs:126:9
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Dec 15 18:29:14.871 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.871 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 15 18:29:14.871 INFO [stderr] 
Dec 15 18:29:14.871 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.871 INFO [stderr]    --> src/repr.rs:132:9
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Dec 15 18:29:14.871 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.871 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 15 18:29:14.871 INFO [stderr] 
Dec 15 18:29:14.871 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.871 INFO [stderr]    --> src/repr.rs:138:9
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Dec 15 18:29:14.871 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.871 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 15 18:29:14.871 INFO [stderr] 
Dec 15 18:29:14.871 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 18:29:14.871 INFO [stderr]    --> src/repr.rs:143:9
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr] 143 |         write!(self.buf, "]");
Dec 15 18:29:14.871 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Dec 15 18:29:14.871 INFO [stderr]     |
Dec 15 18:29:14.871 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 18:29:14.871 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 15 18:29:14.871 INFO [stderr] 
Dec 15 18:29:19.065 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.36s
Dec 15 18:29:19.074 INFO [stderr] su: No module specific data is present
Dec 15 18:29:19.657 INFO running `"docker" "inspect" "18163ba5ddfbdd980a1ed2990e112846cc72abcf2feab9401728b5b7467e2080"`
Dec 15 18:29:19.895 INFO running `"docker" "rm" "-f" "18163ba5ddfbdd980a1ed2990e112846cc72abcf2feab9401728b5b7467e2080"`
Dec 15 18:29:20.251 INFO [stdout] 18163ba5ddfbdd980a1ed2990e112846cc72abcf2feab9401728b5b7467e2080
Dec 15 18:29:20.263 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-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"`
Dec 15 18:29:20.880 INFO [stdout] b8bbc30fc3c17494e899318b9c2c0b9f6003d057baf45fd61303a500f3a3f317
Dec 15 18:29:20.884 INFO running `"docker" "start" "-a" "b8bbc30fc3c17494e899318b9c2c0b9f6003d057baf45fd61303a500f3a3f317"`
Dec 15 18:29:22.043 INFO [stderr] usermod: no changes
Dec 15 18:29:22.194 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
Dec 15 18:29:22.215 INFO [stderr]      Running /target/debug/deps/comacro-6b692602df880900
Dec 15 18:29:22.215 INFO [stdout] 
Dec 15 18:29:22.215 INFO [stderr]    Doc-tests comacro
Dec 15 18:29:22.215 INFO [stdout] running 0 tests
Dec 15 18:29:22.215 INFO [stdout] 
Dec 15 18:29:22.215 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 18:29:22.215 INFO [stdout] 
Dec 15 18:29:23.796 INFO [stdout] 
Dec 15 18:29:23.796 INFO [stdout] running 0 tests
Dec 15 18:29:23.796 INFO [stdout] 
Dec 15 18:29:23.796 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 18:29:23.796 INFO [stdout] 
Dec 15 18:29:23.820 INFO [stderr] su: No module specific data is present
Dec 15 18:29:24.254 INFO running `"docker" "inspect" "b8bbc30fc3c17494e899318b9c2c0b9f6003d057baf45fd61303a500f3a3f317"`
Dec 15 18:29:24.484 INFO running `"docker" "rm" "-f" "b8bbc30fc3c17494e899318b9c2c0b9f6003d057baf45fd61303a500f3a3f317"`
Dec 15 18:29:24.719 INFO [stdout] b8bbc30fc3c17494e899318b9c2c0b9f6003d057baf45fd61303a500f3a3f317