Dec 19 06:45:38.468 INFO checking tperdue321/rust_basics against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 06:45:38.468 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/tperdue321/rust_basics:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 06:45:38.854 INFO [stdout] c7635ed7ca5b707f8766fc9e39c7d0b54a0dc680dd702abfbeca8d2bf42cf54c
Dec 19 06:45:38.856 INFO running `"docker" "start" "-a" "c7635ed7ca5b707f8766fc9e39c7d0b54a0dc680dd702abfbeca8d2bf42cf54c"`
Dec 19 06:45:40.046 INFO [stderr]     Checking basics v0.1.0 (/opt/crater/workdir)
Dec 19 06:45:40.276 INFO [stderr] warning: unused variable: `a`
Dec 19 06:45:40.276 INFO [stderr]  --> src/main.rs:9:9
Dec 19 06:45:40.276 INFO [stderr]   |
Dec 19 06:45:40.276 INFO [stderr] 9 |     let a: i32 = 1;
Dec 19 06:45:40.276 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 19 06:45:40.276 INFO [stderr]   |
Dec 19 06:45:40.276 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 06:45:40.276 INFO [stderr] 
Dec 19 06:45:40.276 INFO [stderr] warning: variable `b` is assigned to, but never used
Dec 19 06:45:40.276 INFO [stderr]   --> src/main.rs:14:13
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr] 14 |     let mut b: i32 = 15;
Dec 19 06:45:40.276 INFO [stderr]    |             ^
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr]    = note: consider using `_b` instead
Dec 19 06:45:40.276 INFO [stderr] 
Dec 19 06:45:40.276 INFO [stderr] warning: value assigned to `b` is never read
Dec 19 06:45:40.276 INFO [stderr]   --> src/main.rs:15:5
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr] 15 |     b = 25;
Dec 19 06:45:40.276 INFO [stderr]    |     ^
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 06:45:40.276 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:40.276 INFO [stderr] 
Dec 19 06:45:40.276 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:40.276 INFO [stderr]   --> src/main.rs:17:9
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr] 17 |     let x: i32; // bindings need to be given a starting val. this is bad
Dec 19 06:45:40.276 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:40.276 INFO [stderr] 
Dec 19 06:45:40.276 INFO [stderr] warning: value assigned to `x` is never read
Dec 19 06:45:40.276 INFO [stderr]   --> src/main.rs:38:13
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr] 38 |     let mut x: i32 = 1;
Dec 19 06:45:40.276 INFO [stderr]    |             ^
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:40.276 INFO [stderr] 
Dec 19 06:45:40.276 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:40.276 INFO [stderr]   --> src/main.rs:42:9
Dec 19 06:45:40.276 INFO [stderr]    |
Dec 19 06:45:40.276 INFO [stderr] 42 |     let y = 4;
Dec 19 06:45:40.276 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:40.277 INFO [stderr] 
Dec 19 06:45:40.277 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:40.277 INFO [stderr]   --> src/main.rs:45:9
Dec 19 06:45:40.277 INFO [stderr]    |
Dec 19 06:45:40.277 INFO [stderr] 45 |     let y = "I can also be bound to text!"; // `y` is now of a different type.
Dec 19 06:45:40.277 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:40.277 INFO [stderr] 
Dec 19 06:45:40.277 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:40.277 INFO [stderr]   --> src/main.rs:60:9
Dec 19 06:45:40.277 INFO [stderr]    |
Dec 19 06:45:40.277 INFO [stderr] 60 |     let x = return_int_plus_1(1);
Dec 19 06:45:40.277 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:40.277 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: unused variable: `a`
Dec 19 06:45:40.284 INFO [stderr]  --> src/main.rs:9:9
Dec 19 06:45:40.284 INFO [stderr]   |
Dec 19 06:45:40.284 INFO [stderr] 9 |     let a: i32 = 1;
Dec 19 06:45:40.284 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 19 06:45:40.284 INFO [stderr]   |
Dec 19 06:45:40.284 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: variable `b` is assigned to, but never used
Dec 19 06:45:40.284 INFO [stderr]   --> src/main.rs:14:13
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr] 14 |     let mut b: i32 = 15;
Dec 19 06:45:40.284 INFO [stderr]    |             ^
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr]    = note: consider using `_b` instead
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: value assigned to `b` is never read
Dec 19 06:45:40.284 INFO [stderr]   --> src/main.rs:15:5
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr] 15 |     b = 25;
Dec 19 06:45:40.284 INFO [stderr]    |     ^
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 06:45:40.284 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:40.284 INFO [stderr]   --> src/main.rs:17:9
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr] 17 |     let x: i32; // bindings need to be given a starting val. this is bad
Dec 19 06:45:40.284 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: value assigned to `x` is never read
Dec 19 06:45:40.284 INFO [stderr]   --> src/main.rs:38:13
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr] 38 |     let mut x: i32 = 1;
Dec 19 06:45:40.284 INFO [stderr]    |             ^
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:40.284 INFO [stderr]   --> src/main.rs:42:9
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr] 42 |     let y = 4;
Dec 19 06:45:40.284 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:40.284 INFO [stderr]   --> src/main.rs:45:9
Dec 19 06:45:40.284 INFO [stderr]    |
Dec 19 06:45:40.284 INFO [stderr] 45 |     let y = "I can also be bound to text!"; // `y` is now of a different type.
Dec 19 06:45:40.284 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:40.284 INFO [stderr] 
Dec 19 06:45:40.284 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:40.285 INFO [stderr]   --> src/main.rs:60:9
Dec 19 06:45:40.285 INFO [stderr]    |
Dec 19 06:45:40.285 INFO [stderr] 60 |     let x = return_int_plus_1(1);
Dec 19 06:45:40.285 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:40.285 INFO [stderr] 
Dec 19 06:45:40.285 INFO [stderr] warning: function is never used: `diverges`
Dec 19 06:45:40.285 INFO [stderr]   --> src/main.rs:93:1
Dec 19 06:45:40.285 INFO [stderr]    |
Dec 19 06:45:40.285 INFO [stderr] 93 | fn diverges() -> ! {
Dec 19 06:45:40.285 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 19 06:45:40.285 INFO [stderr]    |
Dec 19 06:45:40.285 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 06:45:40.285 INFO [stderr] 
Dec 19 06:45:40.288 INFO [stderr] warning: function is never used: `diverges`
Dec 19 06:45:40.288 INFO [stderr]   --> src/main.rs:93:1
Dec 19 06:45:40.288 INFO [stderr]    |
Dec 19 06:45:40.288 INFO [stderr] 93 | fn diverges() -> ! {
Dec 19 06:45:40.288 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 19 06:45:40.288 INFO [stderr]    |
Dec 19 06:45:40.288 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 06:45:40.288 INFO [stderr] 
Dec 19 06:45:40.324 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
Dec 19 06:45:41.084 INFO running `"docker" "inspect" "c7635ed7ca5b707f8766fc9e39c7d0b54a0dc680dd702abfbeca8d2bf42cf54c"`
Dec 19 06:45:41.315 INFO running `"docker" "rm" "-f" "c7635ed7ca5b707f8766fc9e39c7d0b54a0dc680dd702abfbeca8d2bf42cf54c"`
Dec 19 06:45:41.613 INFO [stdout] c7635ed7ca5b707f8766fc9e39c7d0b54a0dc680dd702abfbeca8d2bf42cf54c