[INFO] updating cached repository KeyboardFire/babble
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/KeyboardFire/babble
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/KeyboardFire/babble" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KeyboardFire/babble"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KeyboardFire/babble'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/KeyboardFire/babble" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KeyboardFire/babble"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KeyboardFire/babble'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 81f62d344385882d202b0440a34e4dfbffecbb42
[INFO] sha for GitHub repo KeyboardFire/babble: 81f62d344385882d202b0440a34e4dfbffecbb42
[INFO] validating manifest of KeyboardFire/babble on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of KeyboardFire/babble on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing KeyboardFire/babble
[INFO] finished frobbing KeyboardFire/babble
[INFO] frobbed toml for KeyboardFire/babble written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KeyboardFire/babble/Cargo.toml
[INFO] started frobbing KeyboardFire/babble
[INFO] finished frobbing KeyboardFire/babble
[INFO] frobbed toml for KeyboardFire/babble written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KeyboardFire/babble/Cargo.toml
[INFO] crate KeyboardFire/babble already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KeyboardFire/babble/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking KeyboardFire/babble against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KeyboardFire/babble:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 42f7f8afdd7424e65c4ce126419b255cc96f7b5ac0fa9c53a8c333e4618bb27d
[INFO] running `"docker" "start" "-a" "42f7f8afdd7424e65c4ce126419b255cc96f7b5ac0fa9c53a8c333e4618bb27d"`
[INFO] [stderr]     Checking babble v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `this`
[INFO] [stderr]    --> src/lib.rs:260:36
[INFO] [stderr]     |
[INFO] [stderr] 260 |             "RNG" => Some(Rc::new(|this, _, _| {
[INFO] [stderr]     |                                    ^^^^ help: consider prefixing with an underscore: `_this`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `this`
[INFO] [stderr]    --> src/lib.rs:260:36
[INFO] [stderr]     |
[INFO] [stderr] 260 |             "RNG" => Some(Rc::new(|this, _, _| {
[INFO] [stderr]     |                                    ^^^^ help: consider prefixing with an underscore: `_this`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:336:28
[INFO] [stderr]     |
[INFO] [stderr] 336 |     fn parse_literal_array(mut code: &mut BabbleCodeIterator)
[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/lib.rs:336:28
[INFO] [stderr]     |
[INFO] [stderr] 336 |     fn parse_literal_array(mut code: &mut BabbleCodeIterator)
[INFO] [stderr]     |                            ----^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:395:26
[INFO] [stderr]     |
[INFO] [stderr] 395 |     fn parse_literal_num(mut code: &mut BabbleCodeIterator)
[INFO] [stderr]     |                          ----^^^^
[INFO] [stderr]     |                          |
[INFO] [stderr]     |                          help: remove this `mut`
[INFO] [stderr] 
[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/lib.rs:395:26
[INFO] [stderr]     |
[INFO] [stderr] 395 |     fn parse_literal_num(mut code: &mut BabbleCodeIterator)
[INFO] [stderr]     |                          ----^^^^
[INFO] [stderr]     |                          |
[INFO] [stderr]     |                          help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
[INFO] running `"docker" "inspect" "42f7f8afdd7424e65c4ce126419b255cc96f7b5ac0fa9c53a8c333e4618bb27d"`
[INFO] running `"docker" "rm" "-f" "42f7f8afdd7424e65c4ce126419b255cc96f7b5ac0fa9c53a8c333e4618bb27d"`
[INFO] [stdout] 42f7f8afdd7424e65c4ce126419b255cc96f7b5ac0fa9c53a8c333e4618bb27d