[INFO] crate parse-regex 0.0.1 is already in cache
[INFO] testing parse-regex-0.0.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate parse-regex 0.0.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate parse-regex 0.0.1 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate parse-regex 0.0.1
[INFO] finished tweaking crates.io crate parse-regex 0.0.1
[INFO] tweaked toml for crates.io crate parse-regex 0.0.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stdout] 809f8ec0b403878aa9a7ed3cc7d79ad801bf6d3863c2d70d56e2e1251882fa4b
[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" "809f8ec0b403878aa9a7ed3cc7d79ad801bf6d3863c2d70d56e2e1251882fa4b"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling parse-regex v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(collections)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/parser.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let t1 = try!(self.term());
[INFO] [stderr]    |                  ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/parser.rs:29:22
[INFO] [stderr]    |
[INFO] [stderr] 29 |             let t2 = try!(self.term());
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/parser.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 |             let f = try!(self.factor());
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/parser.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let b = try!(self.base());
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/parser.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |             let r = try!(self.regex());
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `char_at` found for struct `std::string::String` in the current scope
[INFO] [stderr]   --> src/parser.rs:68:16
[INFO] [stderr]    |
[INFO] [stderr] 68 |         self.s.char_at(self.pos)
[INFO] [stderr]    |                ^^^^^^^ method not found in `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `parse-regex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "809f8ec0b403878aa9a7ed3cc7d79ad801bf6d3863c2d70d56e2e1251882fa4b"`
[INFO] running `"docker" "rm" "-f" "809f8ec0b403878aa9a7ed3cc7d79ad801bf6d3863c2d70d56e2e1251882fa4b"`
[INFO] [stdout] 809f8ec0b403878aa9a7ed3cc7d79ad801bf6d3863c2d70d56e2e1251882fa4b