[INFO] updating cached repository https://github.com/FredericJacobs/iStringsCheck
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 052d34eb9ab9add26571a78e158ad838ad4eb329
[INFO] checking FredericJacobs/iStringsCheck against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFredericJacobs%2FiStringsCheck" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FredericJacobs/iStringsCheck on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/FredericJacobs/iStringsCheck
[INFO] finished tweaking git repo https://github.com/FredericJacobs/iStringsCheck
[INFO] tweaked toml for git repo https://github.com/FredericJacobs/iStringsCheck written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/FredericJacobs/iStringsCheck already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-5/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ff1ef6981952874bc468b805016ecde1b0ea1cc31986732c922ddc6aa9efcc1d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "ff1ef6981952874bc468b805016ecde1b0ea1cc31986732c922ddc6aa9efcc1d"`
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking iStringsCheck v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `decode` found for struct `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]    |                                       ^^^^^^ method not found in `docopt::Docopt`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `decode` found for struct `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]    |                                       ^^^^^^ method not found in `docopt::Docopt`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `at` found for struct `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]     |                                                                          ^^ method not found in `regex::Captures<'_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `at` found for struct `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]     |                                                                          ^^ method not found in `regex::Captures<'_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `at` found for struct `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]     |                                               ^^ method not found in `regex::Captures<'_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `at` found for struct `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]     |                                               ^^ method not found in `regex::Captures<'_>`
[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] 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: 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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `iStringsCheck`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ff1ef6981952874bc468b805016ecde1b0ea1cc31986732c922ddc6aa9efcc1d"`
[INFO] running `"docker" "rm" "-f" "ff1ef6981952874bc468b805016ecde1b0ea1cc31986732c922ddc6aa9efcc1d"`
[INFO] [stdout] ff1ef6981952874bc468b805016ecde1b0ea1cc31986732c922ddc6aa9efcc1d
