[INFO] updating cached repository koshkin-kna/maxim_ip_learn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/koshkin-kna/maxim_ip_learn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/koshkin-kna/maxim_ip_learn" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/koshkin-kna/maxim_ip_learn"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/koshkin-kna/maxim_ip_learn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/koshkin-kna/maxim_ip_learn" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/koshkin-kna/maxim_ip_learn"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/koshkin-kna/maxim_ip_learn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 73c9536022d4e65da29f43672355c9cd66b268a3
[INFO] sha for GitHub repo koshkin-kna/maxim_ip_learn: 73c9536022d4e65da29f43672355c9cd66b268a3
[INFO] validating manifest of koshkin-kna/maxim_ip_learn on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of koshkin-kna/maxim_ip_learn on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing koshkin-kna/maxim_ip_learn
[INFO] finished frobbing koshkin-kna/maxim_ip_learn
[INFO] frobbed toml for koshkin-kna/maxim_ip_learn written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/koshkin-kna/maxim_ip_learn/Cargo.toml
[INFO] started frobbing koshkin-kna/maxim_ip_learn
[INFO] finished frobbing koshkin-kna/maxim_ip_learn
[INFO] frobbed toml for koshkin-kna/maxim_ip_learn written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/koshkin-kna/maxim_ip_learn/Cargo.toml
[INFO] crate koshkin-kna/maxim_ip_learn already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking koshkin-kna/maxim_ip_learn against try#18481b65f318e0b4b20c0fc61340054701719d6c for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-0/try#18481b65f318e0b4b20c0fc61340054701719d6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/koshkin-kna/maxim_ip_learn:/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" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3e34987ea9b32728c38c0e6f84198915b058aca52c715abbe6a38a4fdd36a984
[INFO] running `"docker" "start" "-a" "3e34987ea9b32728c38c0e6f84198915b058aca52c715abbe6a38a4fdd36a984"`
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking h2 v0.1.13
[INFO] [stderr]    Compiling string_cache_codegen v0.4.1
[INFO] [stderr]     Checking email v0.0.20
[INFO] [stderr]     Checking tokio-threadpool v0.1.7
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling markup5ever v0.7.3
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking native-tls v0.1.5
[INFO] [stderr]     Checking lettre v0.8.2
[INFO] [stderr]     Checking hyper v0.12.12
[INFO] [stderr]     Checking lettre_email v0.8.2
[INFO] [stderr]     Checking html5ever v0.22.3
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lettre_email-0.8.2/src/lib.rs:361:70
[INFO] [stderr]     |
[INFO] [stderr] 361 |         self.add_header(("Content-Type", format!("{}", content_type).as_ref()));
[INFO] [stderr]     |                                                                      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `lettre_email`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3e34987ea9b32728c38c0e6f84198915b058aca52c715abbe6a38a4fdd36a984"`
[INFO] running `"docker" "rm" "-f" "3e34987ea9b32728c38c0e6f84198915b058aca52c715abbe6a38a4fdd36a984"`
[INFO] [stdout] 3e34987ea9b32728c38c0e6f84198915b058aca52c715abbe6a38a4fdd36a984