[INFO] updating cached repository nkmazur/cert_machine
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nkmazur/cert_machine
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nkmazur/cert_machine" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nkmazur/cert_machine"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nkmazur/cert_machine'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nkmazur/cert_machine" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nkmazur/cert_machine"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nkmazur/cert_machine'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f16cf4ed28eaff2fe5a7bb9b9212d56e33f69fc6
[INFO] sha for GitHub repo nkmazur/cert_machine: f16cf4ed28eaff2fe5a7bb9b9212d56e33f69fc6
[INFO] validating manifest of nkmazur/cert_machine on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nkmazur/cert_machine on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nkmazur/cert_machine
[INFO] finished frobbing nkmazur/cert_machine
[INFO] frobbed toml for nkmazur/cert_machine written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/nkmazur/cert_machine/Cargo.toml
[INFO] started frobbing nkmazur/cert_machine
[INFO] finished frobbing nkmazur/cert_machine
[INFO] frobbed toml for nkmazur/cert_machine written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nkmazur/cert_machine/Cargo.toml
[INFO] crate nkmazur/cert_machine already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nkmazur/cert_machine against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-4/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/nkmazur/cert_machine:/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d15f2ac7b4a178ac3f253d71d5106c5cd17262af1ff5356738e019ed8c75a18a
[INFO] running `"docker" "start" "-a" "d15f2ac7b4a178ac3f253d71d5106c5cd17262af1ff5356738e019ed8c75a18a"`
[INFO] [stderr]     Checking serde_yaml v0.8.8
[INFO] [stderr]     Checking openssl-sys v0.9.43
[INFO] [stderr]     Checking openssl v0.10.20
[INFO] [stderr]     Checking cert_machine v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:245:21
[INFO] [stderr]     |
[INFO] [stderr] 245 |                 let mut cert_filename = match instance.filename {
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:256:21
[INFO] [stderr]     |
[INFO] [stderr] 256 |                 let mut cert_filename = match instance.filename {
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:328:25
[INFO] [stderr]     |
[INFO] [stderr] 328 |                     let mut cert_filename = match instance.filename {
[INFO] [stderr]     |                         ----^^^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:245:21
[INFO] [stderr]     |
[INFO] [stderr] 245 |                 let mut cert_filename = match instance.filename {
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:256:21
[INFO] [stderr]     |
[INFO] [stderr] 256 |                 let mut cert_filename = match instance.filename {
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:328:25
[INFO] [stderr]     |
[INFO] [stderr] 328 |                     let mut cert_filename = match instance.filename {
[INFO] [stderr]     |                         ----^^^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.51s
[INFO] running `"docker" "inspect" "d15f2ac7b4a178ac3f253d71d5106c5cd17262af1ff5356738e019ed8c75a18a"`
[INFO] running `"docker" "rm" "-f" "d15f2ac7b4a178ac3f253d71d5106c5cd17262af1ff5356738e019ed8c75a18a"`
[INFO] [stdout] d15f2ac7b4a178ac3f253d71d5106c5cd17262af1ff5356738e019ed8c75a18a