Dec 18 06:00:07.094 INFO checking Peter-Van-Drunen/readable against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 06:00:07.094 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/Peter-Van-Drunen/readable:/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 06:00:07.464 INFO [stdout] c91ef9b9b4451614dff3ea84628209d998d77034f8ab1b7bed07fb4656e7f534
Dec 18 06:00:07.472 INFO running `"docker" "start" "-a" "c91ef9b9b4451614dff3ea84628209d998d77034f8ab1b7bed07fb4656e7f534"`
Dec 18 06:00:09.500 INFO [stderr]     Checking readable v0.1.0 (/opt/crater/workdir)
Dec 18 06:00:10.056 INFO [stderr] warning: value assigned to `op_node` is never read
Dec 18 06:00:10.056 INFO [stderr]    --> src/main.rs:240:21
Dec 18 06:00:10.056 INFO [stderr]     |
Dec 18 06:00:10.056 INFO [stderr] 240 |             let mut op_node: Node = Node { t: "error_in_transformer".to_string(), val: "".to_string(), kids: Vec::new() };
Dec 18 06:00:10.056 INFO [stderr]     |                     ^^^^^^^
Dec 18 06:00:10.056 INFO [stderr]     |
Dec 18 06:00:10.056 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 18 06:00:10.056 INFO [stderr] 
Dec 18 06:00:10.068 INFO [stderr] warning: value assigned to `op_node` is never read
Dec 18 06:00:10.068 INFO [stderr]    --> src/main.rs:240:21
Dec 18 06:00:10.068 INFO [stderr]     |
Dec 18 06:00:10.068 INFO [stderr] 240 |             let mut op_node: Node = Node { t: "error_in_transformer".to_string(), val: "".to_string(), kids: Vec::new() };
Dec 18 06:00:10.068 INFO [stderr]     |                     ^^^^^^^
Dec 18 06:00:10.068 INFO [stderr]     |
Dec 18 06:00:10.068 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 18 06:00:10.068 INFO [stderr] 
Dec 18 06:00:10.108 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 06:00:10.108 INFO [stderr]   --> src/main.rs:25:5
Dec 18 06:00:10.108 INFO [stderr]    |
Dec 18 06:00:10.108 INFO [stderr] 25 |     in_file.read_to_string(&mut s);
Dec 18 06:00:10.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:00:10.108 INFO [stderr]    |
Dec 18 06:00:10.108 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 06:00:10.108 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 06:00:10.108 INFO [stderr] 
Dec 18 06:00:10.108 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 06:00:10.108 INFO [stderr]   --> src/main.rs:25:5
Dec 18 06:00:10.108 INFO [stderr]    |
Dec 18 06:00:10.108 INFO [stderr] 25 |     in_file.read_to_string(&mut s);
Dec 18 06:00:10.108 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:00:10.108 INFO [stderr]    |
Dec 18 06:00:10.108 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 06:00:10.108 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 06:00:10.108 INFO [stderr] 
Dec 18 06:00:10.165 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
Dec 18 06:00:11.132 INFO running `"docker" "inspect" "c91ef9b9b4451614dff3ea84628209d998d77034f8ab1b7bed07fb4656e7f534"`
Dec 18 06:00:11.355 INFO running `"docker" "rm" "-f" "c91ef9b9b4451614dff3ea84628209d998d77034f8ab1b7bed07fb4656e7f534"`
Dec 18 06:00:11.458 INFO [stdout] c91ef9b9b4451614dff3ea84628209d998d77034f8ab1b7bed07fb4656e7f534