[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-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/davidsullins/AdventOfRust2018"` [INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/davidsullins/AdventOfRust2018'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/davidsullins/AdventOfRust2018" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/davidsullins/AdventOfRust2018"` [INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/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#452087b4bf18cece2d52d7cd8c9147195e5404bf [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of davidsullins/AdventOfRust2018 on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-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-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/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-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking davidsullins/AdventOfRust2018 against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-6/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 7b05ab9e4b185e39c8e3d1717f6aef3240c305fed57cac1ed213fdee47382f7f [INFO] running `"docker" "start" "-a" "7b05ab9e4b185e39c8e3d1717f6aef3240c305fed57cac1ed213fdee47382f7f"` [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 8.50s [INFO] running `"docker" "inspect" "7b05ab9e4b185e39c8e3d1717f6aef3240c305fed57cac1ed213fdee47382f7f"` [INFO] running `"docker" "rm" "-f" "7b05ab9e4b185e39c8e3d1717f6aef3240c305fed57cac1ed213fdee47382f7f"` [INFO] [stdout] 7b05ab9e4b185e39c8e3d1717f6aef3240c305fed57cac1ed213fdee47382f7f