Nov 30 07:26:06.798 INFO checking akuraj/learn_rust against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Nov 30 07:26:06.798 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-0/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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 30 07:26:07.307 INFO [stdout] f141c2451b94048c8a47c287f51083be017b7cfc9bd5615adf6d03df81205b5f
Nov 30 07:26:07.309 INFO running `"docker" "start" "-a" "f141c2451b94048c8a47c287f51083be017b7cfc9bd5615adf6d03df81205b5f"`
Nov 30 07:26:09.035 INFO [stderr] usermod: no changes
Nov 30 07:26:09.148 INFO [stderr]     Checking learn_rust v0.1.0 (/source)
Nov 30 07:26:10.013 INFO [stderr] warning: unused variable: `x`
Nov 30 07:26:10.013 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Nov 30 07:26:10.013 INFO [stderr]   |
Nov 30 07:26:10.014 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 30 07:26:10.014 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Nov 30 07:26:10.014 INFO [stderr]   |
Nov 30 07:26:10.015 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 30 07:26:10.015 INFO [stderr] 
Nov 30 07:26:10.015 INFO [stderr] warning: unused variable: `z`
Nov 30 07:26:10.015 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Nov 30 07:26:10.016 INFO [stderr]   |
Nov 30 07:26:10.016 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 30 07:26:10.016 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Nov 30 07:26:10.017 INFO [stderr] 
Nov 30 07:26:10.017 INFO [stderr] warning: variable `a` is assigned to, but never used
Nov 30 07:26:10.017 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Nov 30 07:26:10.018 INFO [stderr]   |
Nov 30 07:26:10.018 INFO [stderr] 9 |     let a: &u32;
Nov 30 07:26:10.018 INFO [stderr]   |         ^
Nov 30 07:26:10.019 INFO [stderr]   |
Nov 30 07:26:10.019 INFO [stderr]   = note: consider using `_a` instead
Nov 30 07:26:10.019 INFO [stderr] 
Nov 30 07:26:10.019 INFO [stderr] warning: value assigned to `a` is never read
Nov 30 07:26:10.020 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Nov 30 07:26:10.020 INFO [stderr]    |
Nov 30 07:26:10.020 INFO [stderr] 15 |         a = {
Nov 30 07:26:10.021 INFO [stderr]    |         ^
Nov 30 07:26:10.021 INFO [stderr]    |
Nov 30 07:26:10.021 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 30 07:26:10.022 INFO [stderr] 
Nov 30 07:26:10.296 INFO [stderr] warning: unused variable: `x`
Nov 30 07:26:10.296 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Nov 30 07:26:10.296 INFO [stderr]   |
Nov 30 07:26:10.296 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 30 07:26:10.296 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Nov 30 07:26:10.296 INFO [stderr]   |
Nov 30 07:26:10.296 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Nov 30 07:26:10.296 INFO [stderr] 
Nov 30 07:26:10.296 INFO [stderr] warning: unused variable: `z`
Nov 30 07:26:10.296 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Nov 30 07:26:10.296 INFO [stderr]   |
Nov 30 07:26:10.296 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Nov 30 07:26:10.296 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Nov 30 07:26:10.296 INFO [stderr] 
Nov 30 07:26:10.296 INFO [stderr] warning: variable `a` is assigned to, but never used
Nov 30 07:26:10.297 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Nov 30 07:26:10.297 INFO [stderr]   |
Nov 30 07:26:10.297 INFO [stderr] 9 |     let a: &u32;
Nov 30 07:26:10.297 INFO [stderr]   |         ^
Nov 30 07:26:10.297 INFO [stderr]   |
Nov 30 07:26:10.297 INFO [stderr]   = note: consider using `_a` instead
Nov 30 07:26:10.297 INFO [stderr] 
Nov 30 07:26:10.297 INFO [stderr] warning: value assigned to `a` is never read
Nov 30 07:26:10.297 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Nov 30 07:26:10.297 INFO [stderr]    |
Nov 30 07:26:10.297 INFO [stderr] 15 |         a = {
Nov 30 07:26:10.297 INFO [stderr]    |         ^
Nov 30 07:26:10.297 INFO [stderr]    |
Nov 30 07:26:10.297 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 30 07:26:10.297 INFO [stderr] 
Nov 30 07:26:10.353 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
Nov 30 07:26:10.362 INFO [stderr] su: No module specific data is present
Nov 30 07:26:11.626 INFO running `"docker" "inspect" "f141c2451b94048c8a47c287f51083be017b7cfc9bd5615adf6d03df81205b5f"`
Nov 30 07:26:11.940 INFO running `"docker" "rm" "-f" "f141c2451b94048c8a47c287f51083be017b7cfc9bd5615adf6d03df81205b5f"`
Nov 30 07:26:12.368 INFO [stdout] f141c2451b94048c8a47c287f51083be017b7cfc9bd5615adf6d03df81205b5f