Dec 03 15:35:55.556 INFO testing comacro-0.0.1 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 15:35:55.556 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 15:35:56.209 INFO [stdout] e26b67523db1d11a0235be236aa5d7fb0d705a0d4b3257dce1a9c2b98db7924e
Dec 03 15:35:56.211 INFO running `"docker" "start" "-a" "e26b67523db1d11a0235be236aa5d7fb0d705a0d4b3257dce1a9c2b98db7924e"`
Dec 03 15:35:57.455 INFO [stderr] usermod: no changes
Dec 03 15:35:57.578 INFO [stderr]    Compiling log v0.4.6
Dec 03 15:35:57.591 INFO [stderr]    Compiling syn v0.15.22
Dec 03 15:36:14.269 INFO [stderr]    Compiling comacro v0.0.1 (/source)
Dec 03 15:36:18.187 INFO [stderr] warning: unnecessary parentheses around pattern
Dec 03 15:36:18.187 INFO [stderr]   --> src/trace.rs:84:21
Dec 03 15:36:18.187 INFO [stderr]    |
Dec 03 15:36:18.187 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Dec 03 15:36:18.187 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Dec 03 15:36:18.187 INFO [stderr]    |
Dec 03 15:36:18.187 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 03 15:36:18.187 INFO [stderr] 
Dec 03 15:36:18.591 INFO [stderr] warning: unused variable: `x`
Dec 03 15:36:18.591 INFO [stderr]    --> src/repr.rs:270:29
Dec 03 15:36:18.591 INFO [stderr]     |
Dec 03 15:36:18.591 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Dec 03 15:36:18.591 INFO [stderr]     |                             ^ help: consider using `_x` instead
Dec 03 15:36:18.591 INFO [stderr]     |
Dec 03 15:36:18.591 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 03 15:36:18.591 INFO [stderr] 
Dec 03 15:36:18.591 INFO [stderr] warning: unused variable: `x`
Dec 03 15:36:18.591 INFO [stderr]    --> src/repr.rs:271:32
Dec 03 15:36:18.591 INFO [stderr]     |
Dec 03 15:36:18.591 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Dec 03 15:36:18.591 INFO [stderr]     |                                ^ help: consider using `_x` instead
Dec 03 15:36:18.591 INFO [stderr] 
Dec 03 15:36:18.835 INFO [stderr] warning: variant is never constructed: `Cont`
Dec 03 15:36:18.835 INFO [stderr]   --> src/tokens.rs:18:5
Dec 03 15:36:18.835 INFO [stderr]    |
Dec 03 15:36:18.835 INFO [stderr] 18 |     Cont,
Dec 03 15:36:18.835 INFO [stderr]    |     ^^^^
Dec 03 15:36:18.835 INFO [stderr]    |
Dec 03 15:36:18.835 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 03 15:36:18.835 INFO [stderr] 
Dec 03 15:36:18.835 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.835 INFO [stderr]   --> src/repr.rs:41:9
Dec 03 15:36:18.835 INFO [stderr]    |
Dec 03 15:36:18.835 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Dec 03 15:36:18.835 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.835 INFO [stderr]    |
Dec 03 15:36:18.835 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 03 15:36:18.835 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.835 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 03 15:36:18.835 INFO [stderr] 
Dec 03 15:36:18.835 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.835 INFO [stderr]   --> src/repr.rs:47:9
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Dec 03 15:36:18.836 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]   --> src/repr.rs:53:9
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Dec 03 15:36:18.836 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]   --> src/repr.rs:59:9
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Dec 03 15:36:18.836 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]   --> src/repr.rs:65:9
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr] 65 |         write!(self.buf, "}}");
Dec 03 15:36:18.836 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]   --> src/repr.rs:71:13
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr] 71 |             write!(self.buf, "\n");
Dec 03 15:36:18.836 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]   --> src/repr.rs:90:9
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr] 90 |         write!(buf, "[");
Dec 03 15:36:18.836 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]    |
Dec 03 15:36:18.836 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]    --> src/repr.rs:113:13
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr] 113 |             write!(self.buf, "]");
Dec 03 15:36:18.836 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]    --> src/repr.rs:120:9
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Dec 03 15:36:18.836 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]    --> src/repr.rs:126:9
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Dec 03 15:36:18.836 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]    --> src/repr.rs:132:9
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Dec 03 15:36:18.836 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.836 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.836 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 03 15:36:18.836 INFO [stderr] 
Dec 03 15:36:18.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.836 INFO [stderr]    --> src/repr.rs:138:9
Dec 03 15:36:18.836 INFO [stderr]     |
Dec 03 15:36:18.837 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Dec 03 15:36:18.837 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.837 INFO [stderr]     |
Dec 03 15:36:18.837 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.837 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 03 15:36:18.837 INFO [stderr] 
Dec 03 15:36:18.837 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:18.837 INFO [stderr]    --> src/repr.rs:143:9
Dec 03 15:36:18.837 INFO [stderr]     |
Dec 03 15:36:18.837 INFO [stderr] 143 |         write!(self.buf, "]");
Dec 03 15:36:18.837 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:18.837 INFO [stderr]     |
Dec 03 15:36:18.837 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:18.837 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 03 15:36:18.837 INFO [stderr] 
Dec 03 15:36:22.353 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.87s
Dec 03 15:36:22.357 INFO [stderr] su: No module specific data is present
Dec 03 15:36:22.839 INFO running `"docker" "inspect" "e26b67523db1d11a0235be236aa5d7fb0d705a0d4b3257dce1a9c2b98db7924e"`
Dec 03 15:36:22.937 INFO running `"docker" "rm" "-f" "e26b67523db1d11a0235be236aa5d7fb0d705a0d4b3257dce1a9c2b98db7924e"`
Dec 03 15:36:23.039 INFO [stdout] e26b67523db1d11a0235be236aa5d7fb0d705a0d4b3257dce1a9c2b98db7924e
Dec 03 15:36:23.044 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 15:36:23.265 INFO [stdout] 195d0bd06681c2df0e3818020f442f7669cfe6595905c30882922f9a95734ecf
Dec 03 15:36:23.267 INFO running `"docker" "start" "-a" "195d0bd06681c2df0e3818020f442f7669cfe6595905c30882922f9a95734ecf"`
Dec 03 15:36:24.143 INFO [stderr] usermod: no changes
Dec 03 15:36:24.235 INFO [stderr]    Compiling env_logger v0.5.13
Dec 03 15:36:26.566 INFO [stderr]    Compiling comacro v0.0.1 (/source)
Dec 03 15:36:30.574 INFO [stderr] warning: unnecessary parentheses around pattern
Dec 03 15:36:30.574 INFO [stderr]   --> src/trace.rs:84:21
Dec 03 15:36:30.574 INFO [stderr]    |
Dec 03 15:36:30.574 INFO [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
Dec 03 15:36:30.574 INFO [stderr]    |                     ^^^^^^^^^^^^ help: remove these parentheses
Dec 03 15:36:30.574 INFO [stderr]    |
Dec 03 15:36:30.574 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 03 15:36:30.574 INFO [stderr] 
Dec 03 15:36:31.261 INFO [stderr] warning: unused variable: `x`
Dec 03 15:36:31.261 INFO [stderr]    --> src/repr.rs:270:29
Dec 03 15:36:31.261 INFO [stderr]     |
Dec 03 15:36:31.261 INFO [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
Dec 03 15:36:31.261 INFO [stderr]     |                             ^ help: consider using `_x` instead
Dec 03 15:36:31.261 INFO [stderr]     |
Dec 03 15:36:31.261 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 03 15:36:31.261 INFO [stderr] 
Dec 03 15:36:31.261 INFO [stderr] warning: unused variable: `x`
Dec 03 15:36:31.261 INFO [stderr]    --> src/repr.rs:271:32
Dec 03 15:36:31.261 INFO [stderr]     |
Dec 03 15:36:31.261 INFO [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
Dec 03 15:36:31.261 INFO [stderr]     |                                ^ help: consider using `_x` instead
Dec 03 15:36:31.261 INFO [stderr] 
Dec 03 15:36:31.485 INFO [stderr] warning: variant is never constructed: `Cont`
Dec 03 15:36:31.485 INFO [stderr]   --> src/tokens.rs:18:5
Dec 03 15:36:31.485 INFO [stderr]    |
Dec 03 15:36:31.485 INFO [stderr] 18 |     Cont,
Dec 03 15:36:31.485 INFO [stderr]    |     ^^^^
Dec 03 15:36:31.485 INFO [stderr]    |
Dec 03 15:36:31.485 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 03 15:36:31.485 INFO [stderr] 
Dec 03 15:36:31.485 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.486 INFO [stderr]   --> src/repr.rs:41:9
Dec 03 15:36:31.486 INFO [stderr]    |
Dec 03 15:36:31.486 INFO [stderr] 41 |         write!(self.buf, "${}", x);
Dec 03 15:36:31.488 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 03 15:36:31.488 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.488 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 03 15:36:31.488 INFO [stderr] 
Dec 03 15:36:31.488 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.488 INFO [stderr]   --> src/repr.rs:47:9
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr] 47 |         write!(self.buf, "{}", s);
Dec 03 15:36:31.488 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.488 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 03 15:36:31.488 INFO [stderr] 
Dec 03 15:36:31.488 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.488 INFO [stderr]   --> src/repr.rs:53:9
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr] 53 |         write!(self.buf, "{}", s);
Dec 03 15:36:31.488 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.488 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 03 15:36:31.488 INFO [stderr] 
Dec 03 15:36:31.488 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.488 INFO [stderr]   --> src/repr.rs:59:9
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr] 59 |         write!(self.buf, "{}{{", s);
Dec 03 15:36:31.488 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.488 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 03 15:36:31.488 INFO [stderr] 
Dec 03 15:36:31.488 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.488 INFO [stderr]   --> src/repr.rs:65:9
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr] 65 |         write!(self.buf, "}}");
Dec 03 15:36:31.488 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.488 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 03 15:36:31.488 INFO [stderr] 
Dec 03 15:36:31.488 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.488 INFO [stderr]   --> src/repr.rs:71:13
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr] 71 |             write!(self.buf, "\n");
Dec 03 15:36:31.488 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.488 INFO [stderr]    |
Dec 03 15:36:31.488 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.488 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 03 15:36:31.488 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]   --> src/repr.rs:90:9
Dec 03 15:36:31.489 INFO [stderr]    |
Dec 03 15:36:31.489 INFO [stderr] 90 |         write!(buf, "[");
Dec 03 15:36:31.489 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]    |
Dec 03 15:36:31.489 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]    --> src/repr.rs:113:13
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr] 113 |             write!(self.buf, "]");
Dec 03 15:36:31.489 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]    --> src/repr.rs:120:9
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr] 120 |         write!(self.buf, "\"${}\"", x);
Dec 03 15:36:31.489 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]    --> src/repr.rs:126:9
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr] 126 |         write!(self.buf, "{}", s);
Dec 03 15:36:31.489 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]    --> src/repr.rs:132:9
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr] 132 |         write!(self.buf, "\"{}\"", s);
Dec 03 15:36:31.489 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]    --> src/repr.rs:138:9
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
Dec 03 15:36:31.489 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:31.489 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 03 15:36:31.489 INFO [stderr]    --> src/repr.rs:143:9
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr] 143 |         write!(self.buf, "]");
Dec 03 15:36:31.489 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
Dec 03 15:36:31.489 INFO [stderr]     |
Dec 03 15:36:31.489 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 03 15:36:31.489 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 03 15:36:31.489 INFO [stderr] 
Dec 03 15:36:35.495 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.33s
Dec 03 15:36:35.505 INFO [stderr] su: No module specific data is present
Dec 03 15:36:36.071 INFO running `"docker" "inspect" "195d0bd06681c2df0e3818020f442f7669cfe6595905c30882922f9a95734ecf"`
Dec 03 15:36:36.569 INFO running `"docker" "rm" "-f" "195d0bd06681c2df0e3818020f442f7669cfe6595905c30882922f9a95734ecf"`
Dec 03 15:36:36.786 INFO [stdout] 195d0bd06681c2df0e3818020f442f7669cfe6595905c30882922f9a95734ecf
Dec 03 15:36:36.790 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 15:36:37.214 INFO [stdout] 64db7387bdfb9ec029d0da7b3741d988c1dd9e9a743aa9b1950112298f537b83
Dec 03 15:36:37.215 INFO running `"docker" "start" "-a" "64db7387bdfb9ec029d0da7b3741d988c1dd9e9a743aa9b1950112298f537b83"`
Dec 03 15:36:38.414 INFO [stderr] usermod: no changes
Dec 03 15:36:38.513 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Dec 03 15:36:38.530 INFO [stderr]      Running /target/debug/deps/comacro-69077944304d0e86
Dec 03 15:36:38.533 INFO [stdout] 
Dec 03 15:36:38.533 INFO [stdout] running 0 tests
Dec 03 15:36:38.535 INFO [stdout] 
Dec 03 15:36:38.535 INFO [stderr]    Doc-tests comacro
Dec 03 15:36:38.535 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 03 15:36:38.535 INFO [stdout] 
Dec 03 15:36:46.259 INFO [stdout] 
Dec 03 15:36:46.259 INFO [stdout] running 0 tests
Dec 03 15:36:46.259 INFO [stdout] 
Dec 03 15:36:46.259 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 03 15:36:46.259 INFO [stdout] 
Dec 03 15:36:46.271 INFO [stderr] su: No module specific data is present
Dec 03 15:36:47.119 INFO running `"docker" "inspect" "64db7387bdfb9ec029d0da7b3741d988c1dd9e9a743aa9b1950112298f537b83"`
Dec 03 15:36:47.431 INFO running `"docker" "rm" "-f" "64db7387bdfb9ec029d0da7b3741d988c1dd9e9a743aa9b1950112298f537b83"`
Dec 03 15:36:47.647 INFO [stdout] 64db7387bdfb9ec029d0da7b3741d988c1dd9e9a743aa9b1950112298f537b83
