Dec 19 06:45:38.192 INFO checking tperdue321/rust_basics against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 06:45:38.192 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 06:45:38.524 INFO [stdout] d4627067a5db2c186e4c05384fd34294e3ab3b241c6c144459a45469ef2fc952
Dec 19 06:45:38.532 INFO running `"docker" "start" "-a" "d4627067a5db2c186e4c05384fd34294e3ab3b241c6c144459a45469ef2fc952"`
Dec 19 06:45:39.732 INFO [stderr]     Checking basics v0.1.0 (/opt/crater/workdir)
Dec 19 06:45:39.900 INFO [stderr] warning: unused variable: `a`
Dec 19 06:45:39.900 INFO [stderr]  --> src/main.rs:9:9
Dec 19 06:45:39.900 INFO [stderr]   |
Dec 19 06:45:39.900 INFO [stderr] 9 |     let a: i32 = 1;
Dec 19 06:45:39.900 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 19 06:45:39.900 INFO [stderr]   |
Dec 19 06:45:39.900 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 06:45:39.900 INFO [stderr] 
Dec 19 06:45:39.900 INFO [stderr] warning: variable `b` is assigned to, but never used
Dec 19 06:45:39.900 INFO [stderr]   --> src/main.rs:14:13
Dec 19 06:45:39.900 INFO [stderr]    |
Dec 19 06:45:39.900 INFO [stderr] 14 |     let mut b: i32 = 15;
Dec 19 06:45:39.900 INFO [stderr]    |             ^
Dec 19 06:45:39.900 INFO [stderr]    |
Dec 19 06:45:39.900 INFO [stderr]    = note: consider using `_b` instead
Dec 19 06:45:39.900 INFO [stderr] 
Dec 19 06:45:39.900 INFO [stderr] warning: value assigned to `b` is never read
Dec 19 06:45:39.900 INFO [stderr]   --> src/main.rs:15:5
Dec 19 06:45:39.900 INFO [stderr]    |
Dec 19 06:45:39.901 INFO [stderr] 15 |     b = 25;
Dec 19 06:45:39.901 INFO [stderr]    |     ^
Dec 19 06:45:39.901 INFO [stderr]    |
Dec 19 06:45:39.901 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 06:45:39.901 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:39.901 INFO [stderr] 
Dec 19 06:45:39.901 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:39.901 INFO [stderr]   --> src/main.rs:17:9
Dec 19 06:45:39.902 INFO [stderr]    |
Dec 19 06:45:39.902 INFO [stderr] 17 |     let x: i32; // bindings need to be given a starting val. this is bad
Dec 19 06:45:39.902 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:39.902 INFO [stderr] 
Dec 19 06:45:39.902 INFO [stderr] warning: value assigned to `x` is never read
Dec 19 06:45:39.902 INFO [stderr]   --> src/main.rs:38:13
Dec 19 06:45:39.902 INFO [stderr]    |
Dec 19 06:45:39.902 INFO [stderr] 38 |     let mut x: i32 = 1;
Dec 19 06:45:39.902 INFO [stderr]    |             ^
Dec 19 06:45:39.902 INFO [stderr]    |
Dec 19 06:45:39.902 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:39.902 INFO [stderr] 
Dec 19 06:45:39.902 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:39.902 INFO [stderr]   --> src/main.rs:42:9
Dec 19 06:45:39.902 INFO [stderr]    |
Dec 19 06:45:39.902 INFO [stderr] 42 |     let y = 4;
Dec 19 06:45:39.902 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:39.902 INFO [stderr] 
Dec 19 06:45:39.902 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:39.902 INFO [stderr]   --> src/main.rs:45:9
Dec 19 06:45:39.902 INFO [stderr]    |
Dec 19 06:45:39.902 INFO [stderr] 45 |     let y = "I can also be bound to text!"; // `y` is now of a different type.
Dec 19 06:45:39.902 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:39.902 INFO [stderr] 
Dec 19 06:45:39.902 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:39.902 INFO [stderr]   --> src/main.rs:60:9
Dec 19 06:45:39.902 INFO [stderr]    |
Dec 19 06:45:39.902 INFO [stderr] 60 |     let x = return_int_plus_1(1);
Dec 19 06:45:39.902 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:39.902 INFO [stderr] 
Dec 19 06:45:39.908 INFO [stderr] warning: function is never used: `diverges`
Dec 19 06:45:39.908 INFO [stderr]   --> src/main.rs:93:1
Dec 19 06:45:39.908 INFO [stderr]    |
Dec 19 06:45:39.908 INFO [stderr] 93 | fn diverges() -> ! {
Dec 19 06:45:39.908 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 19 06:45:39.908 INFO [stderr]    |
Dec 19 06:45:39.908 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 06:45:39.908 INFO [stderr] 
Dec 19 06:45:39.996 INFO [stderr] warning: unused variable: `a`
Dec 19 06:45:39.996 INFO [stderr]  --> src/main.rs:9:9
Dec 19 06:45:39.996 INFO [stderr]   |
Dec 19 06:45:39.996 INFO [stderr] 9 |     let a: i32 = 1;
Dec 19 06:45:39.996 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 19 06:45:39.996 INFO [stderr]   |
Dec 19 06:45:39.996 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 06:45:39.996 INFO [stderr] 
Dec 19 06:45:39.996 INFO [stderr] warning: variable `b` is assigned to, but never used
Dec 19 06:45:39.996 INFO [stderr]   --> src/main.rs:14:13
Dec 19 06:45:39.996 INFO [stderr]    |
Dec 19 06:45:39.996 INFO [stderr] 14 |     let mut b: i32 = 15;
Dec 19 06:45:39.996 INFO [stderr]    |             ^
Dec 19 06:45:39.996 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr]    = note: consider using `_b` instead
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: value assigned to `b` is never read
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:15:5
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 15 |     b = 25;
Dec 19 06:45:39.997 INFO [stderr]    |     ^
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 06:45:39.997 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:17:9
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 17 |     let x: i32; // bindings need to be given a starting val. this is bad
Dec 19 06:45:39.997 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: value assigned to `x` is never read
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:38:13
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 38 |     let mut x: i32 = 1;
Dec 19 06:45:39.997 INFO [stderr]    |             ^
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:42:9
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 42 |     let y = 4;
Dec 19 06:45:39.997 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: unused variable: `y`
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:45:9
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 45 |     let y = "I can also be bound to text!"; // `y` is now of a different type.
Dec 19 06:45:39.997 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: unused variable: `x`
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:60:9
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 60 |     let x = return_int_plus_1(1);
Dec 19 06:45:39.997 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:39.997 INFO [stderr] warning: function is never used: `diverges`
Dec 19 06:45:39.997 INFO [stderr]   --> src/main.rs:93:1
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr] 93 | fn diverges() -> ! {
Dec 19 06:45:39.997 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 19 06:45:39.997 INFO [stderr]    |
Dec 19 06:45:39.997 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 06:45:39.997 INFO [stderr] 
Dec 19 06:45:40.038 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
Dec 19 06:45:40.524 INFO running `"docker" "inspect" "d4627067a5db2c186e4c05384fd34294e3ab3b241c6c144459a45469ef2fc952"`
Dec 19 06:45:40.798 INFO running `"docker" "rm" "-f" "d4627067a5db2c186e4c05384fd34294e3ab3b241c6c144459a45469ef2fc952"`
Dec 19 06:45:41.024 INFO [stdout] d4627067a5db2c186e4c05384fd34294e3ab3b241c6c144459a45469ef2fc952