[INFO] updating cached repository davidsullins/AdventOfRust2018 [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/davidsullins/AdventOfRust2018 [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/davidsullins/AdventOfRust2018" "work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/davidsullins/AdventOfRust2018"` [INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/davidsullins/AdventOfRust2018'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/davidsullins/AdventOfRust2018" "work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/davidsullins/AdventOfRust2018"` [INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/davidsullins/AdventOfRust2018'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 6260e6579d36fd6f5e5d3fea48409ac92031ba04 [INFO] sha for GitHub repo davidsullins/AdventOfRust2018: 6260e6579d36fd6f5e5d3fea48409ac92031ba04 [INFO] validating manifest of davidsullins/AdventOfRust2018 on toolchain master#efe2f32a6b8217425f361ec7c206910c611c03ee [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of davidsullins/AdventOfRust2018 on toolchain try#78b0bd8441ef961f6475e3d47fe3bca38cb83432 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing davidsullins/AdventOfRust2018 [INFO] finished frobbing davidsullins/AdventOfRust2018 [INFO] frobbed toml for davidsullins/AdventOfRust2018 written to work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/davidsullins/AdventOfRust2018/Cargo.toml [INFO] started frobbing davidsullins/AdventOfRust2018 [INFO] finished frobbing davidsullins/AdventOfRust2018 [INFO] frobbed toml for davidsullins/AdventOfRust2018 written to work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/davidsullins/AdventOfRust2018/Cargo.toml [INFO] crate davidsullins/AdventOfRust2018 already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking davidsullins/AdventOfRust2018 against master#efe2f32a6b8217425f361ec7c206910c611c03ee for pr-60039 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039/worker-6/master#efe2f32a6b8217425f361ec7c206910c611c03ee:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/davidsullins/AdventOfRust2018:/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" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] b9239bf6e61b381674898c0a89d63b0f3fff8d75fcdecf9d1a12cf110cd43d61 [INFO] running `"docker" "start" "-a" "b9239bf6e61b381674898c0a89d63b0f3fff8d75fcdecf9d1a12cf110cd43d61"` [INFO] [stderr] Checking memchr v2.1.1 [INFO] [stderr] Checking aho-corasick v0.6.9 [INFO] [stderr] Checking regex v1.1.0 [INFO] [stderr] Checking AdventOfRust2018 v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: cannot borrow `letter_count` as mutable because it is also borrowed as immutable [INFO] [stderr] --> src/bin/day2.rs:25:13 [INFO] [stderr] | [INFO] [stderr] 24 | let count = letter_count.get(&c).unwrap_or(&0); [INFO] [stderr] | ------------ immutable borrow occurs here [INFO] [stderr] 25 | letter_count.insert(c, count + 1); [INFO] [stderr] | ^^^^^^^^^^^^ ----- immutable borrow later used here [INFO] [stderr] | | [INFO] [stderr] | mutable borrow occurs here [INFO] [stderr] | [INFO] [stderr] = note: #[warn(mutable_borrow_reservation_conflict)] on by default [INFO] [stderr] = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future [INFO] [stderr] = note: for more information, see issue #59159 [INFO] [stderr] [INFO] [stderr] warning: cannot borrow `letter_count` as mutable because it is also borrowed as immutable [INFO] [stderr] --> src/bin/day2.rs:25:13 [INFO] [stderr] | [INFO] [stderr] 24 | let count = letter_count.get(&c).unwrap_or(&0); [INFO] [stderr] | ------------ immutable borrow occurs here [INFO] [stderr] 25 | letter_count.insert(c, count + 1); [INFO] [stderr] | ^^^^^^^^^^^^ ----- immutable borrow later used here [INFO] [stderr] | | [INFO] [stderr] | mutable borrow occurs here [INFO] [stderr] | [INFO] [stderr] = note: #[warn(mutable_borrow_reservation_conflict)] on by default [INFO] [stderr] = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future [INFO] [stderr] = note: for more information, see issue #59159 [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 7.10s [INFO] running `"docker" "inspect" "b9239bf6e61b381674898c0a89d63b0f3fff8d75fcdecf9d1a12cf110cd43d61"` [INFO] running `"docker" "rm" "-f" "b9239bf6e61b381674898c0a89d63b0f3fff8d75fcdecf9d1a12cf110cd43d61"` [INFO] [stdout] b9239bf6e61b381674898c0a89d63b0f3fff8d75fcdecf9d1a12cf110cd43d61