[INFO] updating cached repository FredericJacobs/iStringsCheck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FredericJacobs/iStringsCheck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FredericJacobs/iStringsCheck" "work/ex/beta-1.37-6/sources/1.36.0/gh/FredericJacobs/iStringsCheck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/FredericJacobs/iStringsCheck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FredericJacobs/iStringsCheck" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FredericJacobs/iStringsCheck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FredericJacobs/iStringsCheck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 052d34eb9ab9add26571a78e158ad838ad4eb329
[INFO] sha for GitHub repo FredericJacobs/iStringsCheck: 052d34eb9ab9add26571a78e158ad838ad4eb329
[INFO] validating manifest of FredericJacobs/iStringsCheck on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of FredericJacobs/iStringsCheck on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing FredericJacobs/iStringsCheck
[INFO] finished frobbing FredericJacobs/iStringsCheck
[INFO] frobbed toml for FredericJacobs/iStringsCheck written to work/ex/beta-1.37-6/sources/1.36.0/gh/FredericJacobs/iStringsCheck/Cargo.toml
[INFO] started frobbing FredericJacobs/iStringsCheck
[INFO] finished frobbing FredericJacobs/iStringsCheck
[INFO] frobbed toml for FredericJacobs/iStringsCheck written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FredericJacobs/iStringsCheck/Cargo.toml
[INFO] crate FredericJacobs/iStringsCheck already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/FredericJacobs/iStringsCheck/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[INFO] the lockfile is outdated, regenerating it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" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing FredericJacobs/iStringsCheck against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/FredericJacobs/iStringsCheck:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 0d6acd932cd0d888bddd7cb61ce44d5ea966e9a09c363f4a2f9494286e93d907
[INFO] running `"docker" "start" "-a" "0d6acd932cd0d888bddd7cb61ce44d5ea966e9a09c363f4a2f9494286e93d907"`
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling iStringsCheck 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:31:45
[INFO] [stderr]    |
[INFO] [stderr] 31 |                             .and_then(|d| d.decode())
[INFO] [stderr]    |                                             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `at` found for type `regex::Captures<'_>` in the current scope
[INFO] [stderr]    --> src/main.rs:109:74
[INFO] [stderr]     |
[INFO] [stderr] 109 |                     let n_formats = format_strings_re.captures_iter(&cap.at(2).unwrap()).count();
[INFO] [stderr]     |                                                                          ^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `at` found for type `regex::Captures<'_>` in the current scope
[INFO] [stderr]    --> src/main.rs:110:47
[INFO] [stderr]     |
[INFO] [stderr] 110 |                     source_strings.insert(cap.at(1).unwrap().to_string(), n_formats);
[INFO] [stderr]     |                                               ^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::io::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `iStringsCheck`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0d6acd932cd0d888bddd7cb61ce44d5ea966e9a09c363f4a2f9494286e93d907"`
[INFO] running `"docker" "rm" "-f" "0d6acd932cd0d888bddd7cb61ce44d5ea966e9a09c363f4a2f9494286e93d907"`
[INFO] [stdout] 0d6acd932cd0d888bddd7cb61ce44d5ea966e9a09c363f4a2f9494286e93d907