Dec 18 16:21:31.674 INFO checking fstream-0.1.2 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 16:21:31.674 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/fstream/0.1.2:/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 16:21:31.919 INFO [stdout] b788ae11cae26b71052b5126b816bdfcf5894c8db3fe77d3350d38c4e3f604e6
Dec 18 16:21:31.921 INFO running `"docker" "start" "-a" "b788ae11cae26b71052b5126b816bdfcf5894c8db3fe77d3350d38c4e3f604e6"`
Dec 18 16:21:32.607 INFO [stderr]     Checking fstream v0.1.2 (/opt/crater/workdir)
Dec 18 16:21:32.920 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.920 INFO [stderr]   --> src/lib.rs:21:13
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr] 21 |             file.read_to_end(&mut data);
Dec 18 16:21:32.920 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 16:21:32.920 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.920 INFO [stderr] 
Dec 18 16:21:32.920 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.920 INFO [stderr]   --> src/lib.rs:41:13
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr] 41 |             file.read_to_string(&mut content);
Dec 18 16:21:32.920 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.920 INFO [stderr] 
Dec 18 16:21:32.920 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.920 INFO [stderr]   --> src/lib.rs:61:13
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr] 61 |             file.read_to_string(&mut content);
Dec 18 16:21:32.920 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.920 INFO [stderr] 
Dec 18 16:21:32.920 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.920 INFO [stderr]   --> src/lib.rs:87:13
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr] 87 |             file.read_to_string(&mut content);
Dec 18 16:21:32.920 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.920 INFO [stderr]    |
Dec 18 16:21:32.920 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.920 INFO [stderr] 
Dec 18 16:21:32.980 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.980 INFO [stderr]   --> src/lib.rs:21:13
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr] 21 |             file.read_to_end(&mut data);
Dec 18 16:21:32.980 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 16:21:32.980 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.980 INFO [stderr] 
Dec 18 16:21:32.980 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.980 INFO [stderr]   --> src/lib.rs:41:13
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr] 41 |             file.read_to_string(&mut content);
Dec 18 16:21:32.980 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.980 INFO [stderr] 
Dec 18 16:21:32.980 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.980 INFO [stderr]   --> src/lib.rs:61:13
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr] 61 |             file.read_to_string(&mut content);
Dec 18 16:21:32.980 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.980 INFO [stderr] 
Dec 18 16:21:32.980 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 16:21:32.980 INFO [stderr]   --> src/lib.rs:87:13
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr] 87 |             file.read_to_string(&mut content);
Dec 18 16:21:32.980 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 16:21:32.980 INFO [stderr]    |
Dec 18 16:21:32.980 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 16:21:32.980 INFO [stderr] 
Dec 18 16:21:33.014 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
Dec 18 16:21:33.390 INFO running `"docker" "inspect" "b788ae11cae26b71052b5126b816bdfcf5894c8db3fe77d3350d38c4e3f604e6"`
Dec 18 16:21:33.468 INFO running `"docker" "rm" "-f" "b788ae11cae26b71052b5126b816bdfcf5894c8db3fe77d3350d38c4e3f604e6"`
Dec 18 16:21:33.582 INFO [stdout] b788ae11cae26b71052b5126b816bdfcf5894c8db3fe77d3350d38c4e3f604e6