[INFO] updating cached repository CoreRC/rcgenmsg
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CoreRC/rcgenmsg
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CoreRC/rcgenmsg" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/CoreRC/rcgenmsg"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/CoreRC/rcgenmsg'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CoreRC/rcgenmsg" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/CoreRC/rcgenmsg"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/CoreRC/rcgenmsg'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 30a891acc54f6c2c9edafc6d3219c7b3f5e0dd07
[INFO] sha for GitHub repo CoreRC/rcgenmsg: 30a891acc54f6c2c9edafc6d3219c7b3f5e0dd07
[INFO] validating manifest of CoreRC/rcgenmsg on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CoreRC/rcgenmsg on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing CoreRC/rcgenmsg
[INFO] finished frobbing CoreRC/rcgenmsg
[INFO] frobbed toml for CoreRC/rcgenmsg written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/CoreRC/rcgenmsg/Cargo.toml
[INFO] started frobbing CoreRC/rcgenmsg
[INFO] finished frobbing CoreRC/rcgenmsg
[INFO] frobbed toml for CoreRC/rcgenmsg written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/CoreRC/rcgenmsg/Cargo.toml
[INFO] crate CoreRC/rcgenmsg already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking CoreRC/rcgenmsg against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/CoreRC/rcgenmsg:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] bf307f37ea3b0ebed5c92259a7b5afdd7e9b0bb5695a9c397bebdfa0d53995e8
[INFO] running `"docker" "start" "-a" "bf307f37ea3b0ebed5c92259a7b5afdd7e9b0bb5695a9c397bebdfa0d53995e8"`
[INFO] [stderr]     Checking handlebars v1.0.0-beta.2
[INFO] [stderr]     Checking Inflector v0.11.3
[INFO] [stderr]     Checking rcgenmsg v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:259:13
[INFO] [stderr]     |
[INFO] [stderr] 259 |         for mut f in json_data["fields"].as_array_mut().unwrap() {
[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:282:13
[INFO] [stderr]     |
[INFO] [stderr] 282 |         for mut f in json_data["consts"].as_array_mut().unwrap() {
[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:259:13
[INFO] [stderr]     |
[INFO] [stderr] 259 |         for mut f in json_data["fields"].as_array_mut().unwrap() {
[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:282:13
[INFO] [stderr]     |
[INFO] [stderr] 282 |         for mut f in json_data["consts"].as_array_mut().unwrap() {
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.97s
[INFO] running `"docker" "inspect" "bf307f37ea3b0ebed5c92259a7b5afdd7e9b0bb5695a9c397bebdfa0d53995e8"`
[INFO] running `"docker" "rm" "-f" "bf307f37ea3b0ebed5c92259a7b5afdd7e9b0bb5695a9c397bebdfa0d53995e8"`
[INFO] [stdout] bf307f37ea3b0ebed5c92259a7b5afdd7e9b0bb5695a9c397bebdfa0d53995e8