Dec 18 13:35:43.384 INFO checking notcoal-0.2.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 13:35:43.384 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/notcoal/0.2.0:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 13:35:43.580 INFO [stdout] 77b7e597fb28babe30077907668bcdace74272f71e9ca1f77ae9f3a2445c200f
Dec 18 13:35:43.580 INFO running `"docker" "start" "-a" "77b7e597fb28babe30077907668bcdace74272f71e9ca1f77ae9f3a2445c200f"`
Dec 18 13:35:44.152 INFO [stderr]     Checking supercow v0.1.0
Dec 18 13:35:44.703 INFO [stderr]     Checking notmuch v0.4.2
Dec 18 13:35:45.320 INFO [stderr]     Checking notcoal v0.2.0 (/opt/crater/workdir)
Dec 18 13:35:46.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.181 INFO [stderr]    --> src/lib.rs:189:21
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr] 189 |                     msg.remove_tag(tag);
Dec 18 13:35:46.181 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 13:35:46.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.181 INFO [stderr] 
Dec 18 13:35:46.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.181 INFO [stderr]    --> src/lib.rs:193:25
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr] 193 |                         msg.remove_tag(tag);
Dec 18 13:35:46.181 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.181 INFO [stderr] 
Dec 18 13:35:46.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.181 INFO [stderr]    --> src/lib.rs:198:25
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr] 198 |                         msg.remove_all_tags();
Dec 18 13:35:46.181 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.181 INFO [stderr] 
Dec 18 13:35:46.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.181 INFO [stderr]    --> src/lib.rs:206:21
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr] 206 |                     msg.add_tag(tag);
Dec 18 13:35:46.181 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.181 INFO [stderr] 
Dec 18 13:35:46.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.181 INFO [stderr]    --> src/lib.rs:210:25
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr] 210 |                         msg.add_tag(tag);
Dec 18 13:35:46.181 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.181 INFO [stderr]     |
Dec 18 13:35:46.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.181 INFO [stderr] 
Dec 18 13:35:46.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.182 INFO [stderr]    --> src/lib.rs:245:9
Dec 18 13:35:46.182 INFO [stderr]     |
Dec 18 13:35:46.182 INFO [stderr] 245 |         msg.remove_tag(query_tag);
Dec 18 13:35:46.182 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.182 INFO [stderr]     |
Dec 18 13:35:46.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.182 INFO [stderr] 
Dec 18 13:35:46.272 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.272 INFO [stderr]    --> src/lib.rs:189:21
Dec 18 13:35:46.272 INFO [stderr]     |
Dec 18 13:35:46.272 INFO [stderr] 189 |                     msg.remove_tag(tag);
Dec 18 13:35:46.272 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 13:35:46.273 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.273 INFO [stderr] 
Dec 18 13:35:46.273 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.273 INFO [stderr]    --> src/lib.rs:193:25
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr] 193 |                         msg.remove_tag(tag);
Dec 18 13:35:46.273 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.273 INFO [stderr] 
Dec 18 13:35:46.273 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.273 INFO [stderr]    --> src/lib.rs:198:25
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr] 198 |                         msg.remove_all_tags();
Dec 18 13:35:46.273 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.273 INFO [stderr] 
Dec 18 13:35:46.273 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.273 INFO [stderr]    --> src/lib.rs:206:21
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr] 206 |                     msg.add_tag(tag);
Dec 18 13:35:46.273 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.273 INFO [stderr] 
Dec 18 13:35:46.273 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.273 INFO [stderr]    --> src/lib.rs:210:25
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr] 210 |                         msg.add_tag(tag);
Dec 18 13:35:46.273 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.273 INFO [stderr] 
Dec 18 13:35:46.273 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 13:35:46.273 INFO [stderr]    --> src/lib.rs:245:9
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr] 245 |         msg.remove_tag(query_tag);
Dec 18 13:35:46.273 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:35:46.273 INFO [stderr]     |
Dec 18 13:35:46.273 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 13:35:46.273 INFO [stderr] 
Dec 18 13:35:46.303 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
Dec 18 13:35:46.572 INFO running `"docker" "inspect" "77b7e597fb28babe30077907668bcdace74272f71e9ca1f77ae9f3a2445c200f"`
Dec 18 13:35:46.652 INFO running `"docker" "rm" "-f" "77b7e597fb28babe30077907668bcdace74272f71e9ca1f77ae9f3a2445c200f"`
Dec 18 13:35:46.739 INFO [stdout] 77b7e597fb28babe30077907668bcdace74272f71e9ca1f77ae9f3a2445c200f