Nov 28 09:53:27.247 INFO checking akuraj/learn_rust against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 09:53:27.249 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-5/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 28 09:53:27.684 INFO [stdout] f32d325018d0c4d27059d34bee1ba52ef427e8032e9dff23833e569dc36f2875
Nov 28 09:53:27.686 INFO running `"docker" "start" "-a" "f32d325018d0c4d27059d34bee1ba52ef427e8032e9dff23833e569dc36f2875"`
Nov 28 09:53:29.679 INFO [stderr] usermod: no changes
Nov 28 09:53:29.732 INFO [stderr]     Checking learn_rust v0.1.0 (/source)
Nov 28 09:53:30.485 INFO [stderr] warning: unused variable: `x`
Nov 28 09:53:30.486 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Nov 28 09:53:30.486 INFO [stderr]   |
Nov 28 09:53:30.486 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 28 09:53:30.486 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Nov 28 09:53:30.500 INFO [stderr]   |
Nov 28 09:53:30.501 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 28 09:53:30.501 INFO [stderr] 
Nov 28 09:53:30.501 INFO [stderr] warning: unused variable: `z`
Nov 28 09:53:30.502 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Nov 28 09:53:30.502 INFO [stderr]   |
Nov 28 09:53:30.502 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 28 09:53:30.502 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Nov 28 09:53:30.503 INFO [stderr] 
Nov 28 09:53:30.503 INFO [stderr] warning: variable `a` is assigned to, but never used
Nov 28 09:53:30.503 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Nov 28 09:53:30.504 INFO [stderr]   |
Nov 28 09:53:30.504 INFO [stderr] 9 |     let a: &u32;
Nov 28 09:53:30.504 INFO [stderr]   |         ^
Nov 28 09:53:30.505 INFO [stderr]   |
Nov 28 09:53:30.505 INFO [stderr]   = note: consider using `_a` instead
Nov 28 09:53:30.505 INFO [stderr] 
Nov 28 09:53:30.506 INFO [stderr] warning: value assigned to `a` is never read
Nov 28 09:53:30.506 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Nov 28 09:53:30.507 INFO [stderr]    |
Nov 28 09:53:30.507 INFO [stderr] 15 |         a = {
Nov 28 09:53:30.508 INFO [stderr]    |         ^
Nov 28 09:53:30.508 INFO [stderr]    |
Nov 28 09:53:30.509 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 28 09:53:30.509 INFO [stderr] 
Nov 28 09:53:30.688 INFO [stderr] warning: unused variable: `x`
Nov 28 09:53:30.688 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Nov 28 09:53:30.688 INFO [stderr]   |
Nov 28 09:53:30.688 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 28 09:53:30.688 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Nov 28 09:53:30.688 INFO [stderr]   |
Nov 28 09:53:30.688 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 28 09:53:30.688 INFO [stderr] 
Nov 28 09:53:30.688 INFO [stderr] warning: unused variable: `z`
Nov 28 09:53:30.688 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Nov 28 09:53:30.689 INFO [stderr]   |
Nov 28 09:53:30.689 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 28 09:53:30.689 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Nov 28 09:53:30.689 INFO [stderr] 
Nov 28 09:53:30.689 INFO [stderr] warning: variable `a` is assigned to, but never used
Nov 28 09:53:30.689 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Nov 28 09:53:30.689 INFO [stderr]   |
Nov 28 09:53:30.689 INFO [stderr] 9 |     let a: &u32;
Nov 28 09:53:30.689 INFO [stderr]   |         ^
Nov 28 09:53:30.689 INFO [stderr]   |
Nov 28 09:53:30.689 INFO [stderr]   = note: consider using `_a` instead
Nov 28 09:53:30.689 INFO [stderr] 
Nov 28 09:53:30.689 INFO [stderr] warning: value assigned to `a` is never read
Nov 28 09:53:30.689 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Nov 28 09:53:30.689 INFO [stderr]    |
Nov 28 09:53:30.689 INFO [stderr] 15 |         a = {
Nov 28 09:53:30.689 INFO [stderr]    |         ^
Nov 28 09:53:30.689 INFO [stderr]    |
Nov 28 09:53:30.689 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 28 09:53:30.689 INFO [stderr] 
Nov 28 09:53:30.761 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Nov 28 09:53:30.764 INFO [stderr] su: No module specific data is present
Nov 28 09:53:32.026 INFO running `"docker" "inspect" "f32d325018d0c4d27059d34bee1ba52ef427e8032e9dff23833e569dc36f2875"`
Nov 28 09:53:32.422 INFO running `"docker" "rm" "-f" "f32d325018d0c4d27059d34bee1ba52ef427e8032e9dff23833e569dc36f2875"`
Nov 28 09:53:32.756 INFO [stdout] f32d325018d0c4d27059d34bee1ba52ef427e8032e9dff23833e569dc36f2875