[INFO] updating cached repository dcampbell24/rusty_skyscrapers
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dcampbell24/rusty_skyscrapers
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dcampbell24/rusty_skyscrapers" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/dcampbell24/rusty_skyscrapers"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/dcampbell24/rusty_skyscrapers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dcampbell24/rusty_skyscrapers" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/dcampbell24/rusty_skyscrapers"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/dcampbell24/rusty_skyscrapers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c65709e1cc3a53b6788ca3abb530b10c9a7d4018
[INFO] sha for GitHub repo dcampbell24/rusty_skyscrapers: c65709e1cc3a53b6788ca3abb530b10c9a7d4018
[INFO] validating manifest of dcampbell24/rusty_skyscrapers 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 dcampbell24/rusty_skyscrapers 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 dcampbell24/rusty_skyscrapers
[INFO] finished frobbing dcampbell24/rusty_skyscrapers
[INFO] frobbed toml for dcampbell24/rusty_skyscrapers written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/dcampbell24/rusty_skyscrapers/Cargo.toml
[INFO] started frobbing dcampbell24/rusty_skyscrapers
[INFO] finished frobbing dcampbell24/rusty_skyscrapers
[INFO] frobbed toml for dcampbell24/rusty_skyscrapers written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/dcampbell24/rusty_skyscrapers/Cargo.toml
[INFO] crate dcampbell24/rusty_skyscrapers 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/dcampbell24/rusty_skyscrapers/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 dcampbell24/rusty_skyscrapers 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/dcampbell24/rusty_skyscrapers:/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] c1c0f790167793d93e0d32dbdd24a0e5d9ea369dfaaa54df58cda7b8571ce6b1
[INFO] running `"docker" "start" "-a" "c1c0f790167793d93e0d32dbdd24a0e5d9ea369dfaaa54df58cda7b8571ce6b1"`
[INFO] [stderr]     Checking rusty_skyscrapers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0599]: no method named `decode` found for type `docopt::Docopt` in the current scope
[INFO] [stderr]   --> src/main.rs:79:56
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let args: Args = Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| {
[INFO] [stderr]    |                                                        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `decode` found for type `docopt::Docopt` in the current scope
[INFO] [stderr]   --> src/main.rs:79:56
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let args: Args = Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| {
[INFO] [stderr]    |                                                        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `rusty_skyscrapers`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `rusty_skyscrapers`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c1c0f790167793d93e0d32dbdd24a0e5d9ea369dfaaa54df58cda7b8571ce6b1"`
[INFO] running `"docker" "rm" "-f" "c1c0f790167793d93e0d32dbdd24a0e5d9ea369dfaaa54df58cda7b8571ce6b1"`
[INFO] [stdout] c1c0f790167793d93e0d32dbdd24a0e5d9ea369dfaaa54df58cda7b8571ce6b1