[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/beta-1.38-1/sources/1.37.0/gh/CoreRC/rcgenmsg"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/CoreRC/rcgenmsg'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CoreRC/rcgenmsg" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CoreRC/rcgenmsg"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CoreRC/rcgenmsg on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing CoreRC/rcgenmsg against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] c86d903b56308f8f1fb443248f3f73e3e63a9fcfc3a3dcdf2255d912db71e4e2
[INFO] running `"docker" "start" "-a" "c86d903b56308f8f1fb443248f3f73e3e63a9fcfc3a3dcdf2255d912db71e4e2"`
[INFO] [stderr]    Compiling serde v1.0.69
[INFO] [stderr]    Compiling argparse v0.2.1
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling aho-corasick v0.6.5
[INFO] [stderr]    Compiling pest_derive v1.0.7
[INFO] [stderr]    Compiling serde_derive v1.0.69
[INFO] [stderr]    Compiling regex v1.0.1
[INFO] [stderr]    Compiling Inflector v0.11.3
[INFO] [stderr]    Compiling serde_json v1.0.22
[INFO] [stderr]    Compiling handlebars v1.0.0-beta.2
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 48.84s
[INFO] running `"docker" "inspect" "c86d903b56308f8f1fb443248f3f73e3e63a9fcfc3a3dcdf2255d912db71e4e2"`
[INFO] running `"docker" "rm" "-f" "c86d903b56308f8f1fb443248f3f73e3e63a9fcfc3a3dcdf2255d912db71e4e2"`
[INFO] [stdout] c86d903b56308f8f1fb443248f3f73e3e63a9fcfc3a3dcdf2255d912db71e4e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1c13832026c493c0755755466a4308514b38e78f5ea70c6ce674b789a933f2d2
[INFO] running `"docker" "start" "-a" "1c13832026c493c0755755466a4308514b38e78f5ea70c6ce674b789a933f2d2"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 4.78s
[INFO] running `"docker" "inspect" "1c13832026c493c0755755466a4308514b38e78f5ea70c6ce674b789a933f2d2"`
[INFO] running `"docker" "rm" "-f" "1c13832026c493c0755755466a4308514b38e78f5ea70c6ce674b789a933f2d2"`
[INFO] [stdout] 1c13832026c493c0755755466a4308514b38e78f5ea70c6ce674b789a933f2d2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 7902d6a736de32483988c3ef2cff20bf2b96ca09c3a98bf7fd0af827127db761
[INFO] running `"docker" "start" "-a" "7902d6a736de32483988c3ef2cff20bf2b96ca09c3a98bf7fd0af827127db761"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rcgenmsg-5ef77a3ba954f200
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7902d6a736de32483988c3ef2cff20bf2b96ca09c3a98bf7fd0af827127db761"`
[INFO] running `"docker" "rm" "-f" "7902d6a736de32483988c3ef2cff20bf2b96ca09c3a98bf7fd0af827127db761"`
[INFO] [stdout] 7902d6a736de32483988c3ef2cff20bf2b96ca09c3a98bf7fd0af827127db761