[INFO] updating cached repository PurpleMyst/aoc-day24-part-two
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PurpleMyst/aoc-day24-part-two
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PurpleMyst/aoc-day24-part-two" "work/ex/beta-1.38-1/sources/1.37.0/gh/PurpleMyst/aoc-day24-part-two"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/PurpleMyst/aoc-day24-part-two'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PurpleMyst/aoc-day24-part-two" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PurpleMyst/aoc-day24-part-two"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PurpleMyst/aoc-day24-part-two'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b92843a3886c51c272c5aa5d24f7063d9e3568f3
[INFO] sha for GitHub repo PurpleMyst/aoc-day24-part-two: b92843a3886c51c272c5aa5d24f7063d9e3568f3
[INFO] validating manifest of PurpleMyst/aoc-day24-part-two on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of PurpleMyst/aoc-day24-part-two on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing PurpleMyst/aoc-day24-part-two
[INFO] finished frobbing PurpleMyst/aoc-day24-part-two
[INFO] frobbed toml for PurpleMyst/aoc-day24-part-two written to work/ex/beta-1.38-1/sources/1.37.0/gh/PurpleMyst/aoc-day24-part-two/Cargo.toml
[INFO] started frobbing PurpleMyst/aoc-day24-part-two
[INFO] finished frobbing PurpleMyst/aoc-day24-part-two
[INFO] frobbed toml for PurpleMyst/aoc-day24-part-two written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PurpleMyst/aoc-day24-part-two/Cargo.toml
[INFO] crate PurpleMyst/aoc-day24-part-two already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing PurpleMyst/aoc-day24-part-two against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/PurpleMyst/aoc-day24-part-two:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4a7dddce817e481b3f86f92df4582a7e2fa0cab315590d7426f4d8a9b03d3326
[INFO] running `"docker" "start" "-a" "4a7dddce817e481b3f86f92df4582a7e2fa0cab315590d7426f4d8a9b03d3326"`
[INFO] [stderr]    Compiling aoc-day24-part-two v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `read_string` in module `fs`
[INFO] [stderr]   --> src/main.rs:11:26
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let components = fs::read_string("input.txt")
[INFO] [stderr]    |                          ^^^^^^^^^^^ help: a function with a similar name exists: `read_to_string`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(fs_read_write)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `aoc-day24-part-two`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4a7dddce817e481b3f86f92df4582a7e2fa0cab315590d7426f4d8a9b03d3326"`
[INFO] running `"docker" "rm" "-f" "4a7dddce817e481b3f86f92df4582a7e2fa0cab315590d7426f4d8a9b03d3326"`
[INFO] [stdout] 4a7dddce817e481b3f86f92df4582a7e2fa0cab315590d7426f4d8a9b03d3326