[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-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/gh/CoreRC/rcgenmsg"`
[INFO] [stderr] Cloning into 'work/ex/pr-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/gh/CoreRC/rcgenmsg'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CoreRC/rcgenmsg" "work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/gh/CoreRC/rcgenmsg"`
[INFO] [stderr] Cloning into 'work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/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#7840a0b753a065a41999f1fb6028f67d33e3fdd5
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CoreRC/rcgenmsg on toolchain try#6a9f0b6cc40687e25f9d772e3b10bab335c63853
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-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-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/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-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/gh/CoreRC/rcgenmsg/Cargo.toml
[INFO] crate CoreRC/rcgenmsg already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking CoreRC/rcgenmsg against try#6a9f0b6cc40687e25f9d772e3b10bab335c63853 for pr-60466
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60466/worker-4/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/gh/CoreRC/rcgenmsg:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 20da7cc849f09705e1eb7f2663e82af2af92c526c3a57f5fd4032f468eb2e836
[INFO] running `"docker" "start" "-a" "20da7cc849f09705e1eb7f2663e82af2af92c526c3a57f5fd4032f468eb2e836"`
[INFO] [stderr]     Checking rust-crypto v0.2.36
[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 9.08s
[INFO] running `"docker" "inspect" "20da7cc849f09705e1eb7f2663e82af2af92c526c3a57f5fd4032f468eb2e836"`
[INFO] running `"docker" "rm" "-f" "20da7cc849f09705e1eb7f2663e82af2af92c526c3a57f5fd4032f468eb2e836"`
[INFO] [stdout] 20da7cc849f09705e1eb7f2663e82af2af92c526c3a57f5fd4032f468eb2e836