[INFO] updating cached repository BurntSushi/rust-cmail
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/BurntSushi/rust-cmail
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/BurntSushi/rust-cmail" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/BurntSushi/rust-cmail"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/BurntSushi/rust-cmail'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/BurntSushi/rust-cmail" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/BurntSushi/rust-cmail"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/BurntSushi/rust-cmail'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ccb09ab81ffa801a2a293a73e0f99f320865debf
[INFO] sha for GitHub repo BurntSushi/rust-cmail: ccb09ab81ffa801a2a293a73e0f99f320865debf
[INFO] validating manifest of BurntSushi/rust-cmail on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of BurntSushi/rust-cmail on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing BurntSushi/rust-cmail
[INFO] finished frobbing BurntSushi/rust-cmail
[INFO] frobbed toml for BurntSushi/rust-cmail written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/BurntSushi/rust-cmail/Cargo.toml
[INFO] started frobbing BurntSushi/rust-cmail
[INFO] finished frobbing BurntSushi/rust-cmail
[INFO] frobbed toml for BurntSushi/rust-cmail written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/BurntSushi/rust-cmail/Cargo.toml
[INFO] crate BurntSushi/rust-cmail already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/BurntSushi/rust-cmail/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking BurntSushi/rust-cmail against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-3/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/BurntSushi/rust-cmail:/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" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7dec2ac7939fc72af4ebbb11732ad7c402ccab383c3f75858b898fc4457b743b
[INFO] running `"docker" "start" "-a" "7dec2ac7939fc72af4ebbb11732ad7c402ccab383c3f75858b898fc4457b743b"`
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]     Checking cmail v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> cmail.rs:50:47
[INFO] [stderr]    |
[INFO] [stderr] 50 | type Result<T> = ::std::result::Result<T, Box<Error + Send + Sync>>;
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> cmail.rs:369:25
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn wtr(self) -> Box<io::Write> {
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> cmail.rs:50:47
[INFO] [stderr]    |
[INFO] [stderr] 50 | type Result<T> = ::std::result::Result<T, Box<Error + Send + Sync>>;
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> cmail.rs:369:25
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn wtr(self) -> Box<io::Write> {
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.72s
[INFO] running `"docker" "inspect" "7dec2ac7939fc72af4ebbb11732ad7c402ccab383c3f75858b898fc4457b743b"`
[INFO] running `"docker" "rm" "-f" "7dec2ac7939fc72af4ebbb11732ad7c402ccab383c3f75858b898fc4457b743b"`
[INFO] [stdout] 7dec2ac7939fc72af4ebbb11732ad7c402ccab383c3f75858b898fc4457b743b