Dec 19 15:22:24.481 INFO checking java007hf/Rust_demo against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 15:22:24.481 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/java007hf/Rust_demo:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:22:24.675 INFO [stdout] 17dbeadfe8dfa0a12add23953cceaa74d2626624bda8ea28b3ffec02d0cdf6f5
Dec 19 15:22:24.677 INFO running `"docker" "start" "-a" "17dbeadfe8dfa0a12add23953cceaa74d2626624bda8ea28b3ffec02d0cdf6f5"`
Dec 19 15:22:25.225 INFO [stderr]     Checking rust_demo v0.1.0 (/opt/crater/workdir)
Dec 19 15:22:25.386 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 19 15:22:25.386 INFO [stderr]    --> src/main.rs:214:14
Dec 19 15:22:25.386 INFO [stderr]     |
Dec 19 15:22:25.386 INFO [stderr] 214 |     for x in (0..11) {
Dec 19 15:22:25.386 INFO [stderr]     |              ^^^^^^^ help: remove these parentheses
Dec 19 15:22:25.386 INFO [stderr]     |
Dec 19 15:22:25.386 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 19 15:22:25.386 INFO [stderr] 
Dec 19 15:22:25.425 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 19 15:22:25.425 INFO [stderr]    --> src/main.rs:214:14
Dec 19 15:22:25.425 INFO [stderr]     |
Dec 19 15:22:25.425 INFO [stderr] 214 |     for x in (0..11) {
Dec 19 15:22:25.425 INFO [stderr]     |              ^^^^^^^ help: remove these parentheses
Dec 19 15:22:25.425 INFO [stderr]     |
Dec 19 15:22:25.425 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 19 15:22:25.425 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: variable `inferred_type` is assigned to, but never used
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:19:13
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 19 |     let mut inferred_type = 12; // Type i64 is inferred from another line
Dec 19 15:22:25.520 INFO [stderr]    |             ^^^^^^^^^^^^^
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:22:25.520 INFO [stderr]    = note: consider using `_inferred_type` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: value assigned to `inferred_type` is never read
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:20:5
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 20 |     inferred_type = 4294967296i64;
Dec 19 15:22:25.520 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 15:22:25.520 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: variable `mutable` is assigned to, but never used
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:23:13
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 23 |     let mut mutable = 12; // Mutable `i32`
Dec 19 15:22:25.520 INFO [stderr]    |             ^^^^^^^
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr]    = note: consider using `_mutable` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: value assigned to `mutable` is never read
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:24:5
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 24 |     mutable = 21;
Dec 19 15:22:25.520 INFO [stderr]    |     ^^^^^^^
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: value assigned to `mutable` is never read
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:27:5
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 27 |     mutable = 11;
Dec 19 15:22:25.520 INFO [stderr]    |     ^^^^^^^
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `mutable`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:30:9
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 30 |     let mutable = true;
Dec 19 15:22:25.520 INFO [stderr]    |         ^^^^^^^ help: consider using `_mutable` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `a`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:36:9
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 36 |     let a = [1, 2, 3]; // a: [i32; 3]
Dec 19 15:22:25.520 INFO [stderr]    |         ^ help: consider using `_a` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `middle`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:61:9
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 61 |     let middle = &a[1..3];
Dec 19 15:22:25.520 INFO [stderr]    |         ^^^^^^ help: consider using `_middle` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `a`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:67:10
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 67 |     let (a, b, c) = y;
Dec 19 15:22:25.520 INFO [stderr]    |          ^ help: consider using `_a` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `b`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:67:13
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 67 |     let (a, b, c) = y;
Dec 19 15:22:25.520 INFO [stderr]    |             ^ help: consider using `_b` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `y`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:73:9
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 73 |     let y = tuple.1;
Dec 19 15:22:25.520 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 15:22:25.520 INFO [stderr] 
Dec 19 15:22:25.520 INFO [stderr] warning: unused variable: `z`
Dec 19 15:22:25.520 INFO [stderr]   --> src/main.rs:74:9
Dec 19 15:22:25.520 INFO [stderr]    |
Dec 19 15:22:25.520 INFO [stderr] 74 |     let z = tuple.2;
Dec 19 15:22:25.520 INFO [stderr]    |         ^ help: consider using `_z` instead
Dec 19 15:22:25.521 INFO [stderr] 
Dec 19 15:22:25.521 INFO [stderr] warning: unused variable: `j`
Dec 19 15:22:25.521 INFO [stderr]   --> src/main.rs:91:9
Dec 19 15:22:25.521 INFO [stderr]    |
Dec 19 15:22:25.521 INFO [stderr] 91 |     let j: i32 = 0;
Dec 19 15:22:25.521 INFO [stderr]    |         ^ help: consider using `_j` instead
Dec 19 15:22:25.521 INFO [stderr] 
Dec 19 15:22:25.521 INFO [stderr] warning: unused variable: `v2`
Dec 19 15:22:25.521 INFO [stderr]    --> src/main.rs:119:9
Dec 19 15:22:25.521 INFO [stderr]     |
Dec 19 15:22:25.521 INFO [stderr] 119 |     let v2 = v;
Dec 19 15:22:25.521 INFO [stderr]     |         ^^ help: consider using `_v2` instead
Dec 19 15:22:25.521 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: variable `inferred_type` is assigned to, but never used
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:19:13
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 19 |     let mut inferred_type = 12; // Type i64 is inferred from another line
Dec 19 15:22:25.547 INFO [stderr]    |             ^^^^^^^^^^^^^
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:22:25.547 INFO [stderr]    = note: consider using `_inferred_type` instead
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: value assigned to `inferred_type` is never read
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:20:5
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 20 |     inferred_type = 4294967296i64;
Dec 19 15:22:25.547 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 15:22:25.547 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: variable `mutable` is assigned to, but never used
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:23:13
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 23 |     let mut mutable = 12; // Mutable `i32`
Dec 19 15:22:25.547 INFO [stderr]    |             ^^^^^^^
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr]    = note: consider using `_mutable` instead
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: value assigned to `mutable` is never read
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:24:5
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 24 |     mutable = 21;
Dec 19 15:22:25.547 INFO [stderr]    |     ^^^^^^^
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: value assigned to `mutable` is never read
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:27:5
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 27 |     mutable = 11;
Dec 19 15:22:25.547 INFO [stderr]    |     ^^^^^^^
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: unused variable: `mutable`
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:30:9
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 30 |     let mutable = true;
Dec 19 15:22:25.547 INFO [stderr]    |         ^^^^^^^ help: consider using `_mutable` instead
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: unused variable: `a`
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:36:9
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 36 |     let a = [1, 2, 3]; // a: [i32; 3]
Dec 19 15:22:25.547 INFO [stderr]    |         ^ help: consider using `_a` instead
Dec 19 15:22:25.547 INFO [stderr] 
Dec 19 15:22:25.547 INFO [stderr] warning: unused variable: `middle`
Dec 19 15:22:25.547 INFO [stderr]   --> src/main.rs:61:9
Dec 19 15:22:25.547 INFO [stderr]    |
Dec 19 15:22:25.547 INFO [stderr] 61 |     let middle = &a[1..3];
Dec 19 15:22:25.548 INFO [stderr]    |         ^^^^^^ help: consider using `_middle` instead
Dec 19 15:22:25.548 INFO [stderr] 
Dec 19 15:22:25.548 INFO [stderr] warning: unused variable: `a`
Dec 19 15:22:25.548 INFO [stderr]   --> src/main.rs:67:10
Dec 19 15:22:25.548 INFO [stderr]    |
Dec 19 15:22:25.548 INFO [stderr] 67 |     let (a, b, c) = y;
Dec 19 15:22:25.548 INFO [stderr]    |          ^ help: consider using `_a` instead
Dec 19 15:22:25.548 INFO [stderr] 
Dec 19 15:22:25.548 INFO [stderr] warning: unused variable: `b`
Dec 19 15:22:25.548 INFO [stderr]   --> src/main.rs:67:13
Dec 19 15:22:25.548 INFO [stderr]    |
Dec 19 15:22:25.548 INFO [stderr] 67 |     let (a, b, c) = y;
Dec 19 15:22:25.548 INFO [stderr]    |             ^ help: consider using `_b` instead
Dec 19 15:22:25.548 INFO [stderr] 
Dec 19 15:22:25.548 INFO [stderr] warning: unused variable: `y`
Dec 19 15:22:25.548 INFO [stderr]   --> src/main.rs:73:9
Dec 19 15:22:25.548 INFO [stderr]    |
Dec 19 15:22:25.548 INFO [stderr] 73 |     let y = tuple.1;
Dec 19 15:22:25.548 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 15:22:25.548 INFO [stderr] 
Dec 19 15:22:25.548 INFO [stderr] warning: unused variable: `z`
Dec 19 15:22:25.548 INFO [stderr]   --> src/main.rs:74:9
Dec 19 15:22:25.548 INFO [stderr]    |
Dec 19 15:22:25.548 INFO [stderr] 74 |     let z = tuple.2;
Dec 19 15:22:25.548 INFO [stderr]    |         ^ help: consider using `_z` instead
Dec 19 15:22:25.548 INFO [stderr] 
Dec 19 15:22:25.550 INFO [stderr] warning: function is never used: `diverges`
Dec 19 15:22:25.550 INFO [stderr]    --> src/main.rs:188:1
Dec 19 15:22:25.550 INFO [stderr]     |
Dec 19 15:22:25.550 INFO [stderr] 188 | fn diverges() -> ! {
Dec 19 15:22:25.550 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^
Dec 19 15:22:25.550 INFO [stderr]     |
Dec 19 15:22:25.550 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 15:22:25.550 INFO [stderr] 
Dec 19 15:22:25.550 INFO [stderr] warning: unused variable: `j`
Dec 19 15:22:25.550 INFO [stderr]   --> src/main.rs:91:9
Dec 19 15:22:25.550 INFO [stderr]    |
Dec 19 15:22:25.550 INFO [stderr] 91 |     let j: i32 = 0;
Dec 19 15:22:25.550 INFO [stderr]    |         ^ help: consider using `_j` instead
Dec 19 15:22:25.550 INFO [stderr] 
Dec 19 15:22:25.550 INFO [stderr] warning: unused variable: `v2`
Dec 19 15:22:25.550 INFO [stderr]    --> src/main.rs:119:9
Dec 19 15:22:25.550 INFO [stderr]     |
Dec 19 15:22:25.550 INFO [stderr] 119 |     let v2 = v;
Dec 19 15:22:25.550 INFO [stderr]     |         ^^ help: consider using `_v2` instead
Dec 19 15:22:25.550 INFO [stderr] 
Dec 19 15:22:25.598 INFO [stderr] warning: function is never used: `diverges`
Dec 19 15:22:25.598 INFO [stderr]    --> src/main.rs:188:1
Dec 19 15:22:25.598 INFO [stderr]     |
Dec 19 15:22:25.598 INFO [stderr] 188 | fn diverges() -> ! {
Dec 19 15:22:25.598 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^
Dec 19 15:22:25.598 INFO [stderr]     |
Dec 19 15:22:25.598 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 15:22:25.598 INFO [stderr] 
Dec 19 15:22:25.620 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
Dec 19 15:22:25.994 INFO running `"docker" "inspect" "17dbeadfe8dfa0a12add23953cceaa74d2626624bda8ea28b3ffec02d0cdf6f5"`
Dec 19 15:22:26.084 INFO running `"docker" "rm" "-f" "17dbeadfe8dfa0a12add23953cceaa74d2626624bda8ea28b3ffec02d0cdf6f5"`
Dec 19 15:22:26.180 INFO [stdout] 17dbeadfe8dfa0a12add23953cceaa74d2626624bda8ea28b3ffec02d0cdf6f5