[INFO] fetching crate mon-artist 0.1.3...
[INFO] extracting crate mon-artist 0.1.3 into work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/mon-artist/0.1.3
[INFO] extracting crate mon-artist 0.1.3 into work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/mon-artist/0.1.3
[INFO] validating manifest of mon-artist-0.1.3 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 mon-artist-0.1.3 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 mon-artist-0.1.3
[INFO] finished frobbing mon-artist-0.1.3
[INFO] frobbed toml for mon-artist-0.1.3 written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/mon-artist/0.1.3/Cargo.toml
[INFO] started frobbing mon-artist-0.1.3
[INFO] finished frobbing mon-artist-0.1.3
[INFO] frobbed toml for mon-artist-0.1.3 written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/mon-artist/0.1.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tango v0.6.2
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mon-artist-0.1.3 against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-5/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/mon-artist/0.1.3:/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] 770377d1ecd5bd3360a066e7a07be0937e8fd1557ea52f4091ccc0869cc38dd3
[INFO] running `"docker" "start" "-a" "770377d1ecd5bd3360a066e7a07be0937e8fd1557ea52f4091ccc0869cc38dd3"`
[INFO] [stderr]    Compiling tango v0.6.2
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]     Checking xml-rs v0.2.2
[INFO] [stderr]    Compiling docopt v0.7.0
[INFO] [stderr]     Checking treexml v0.3.0
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/tango-0.6.2/src/lib.rs:259:66
[INFO] [stderr]     |
[INFO] [stderr] 259 |         for c in self.0.components().skip(1) { p.push(c.as_ref().to_str().expect("how else can I replace root?")); }
[INFO] [stderr]     |                                                                  ^^^^^^ cannot infer type for `T`
[INFO] [stderr]     |
[INFO] [stderr]     = note: type must be known at this point
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/tango-0.6.2/src/lib.rs:273:66
[INFO] [stderr]     |
[INFO] [stderr] 273 |         for c in self.0.components().skip(1) { p.push(c.as_ref().to_str().expect("how else can I replace root?")); }
[INFO] [stderr]     |                                                                  ^^^^^^ cannot infer type for `T`
[INFO] [stderr]     |
[INFO] [stderr]     = note: type must be known at this point
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: Could not compile `tango`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "770377d1ecd5bd3360a066e7a07be0937e8fd1557ea52f4091ccc0869cc38dd3"`
[INFO] running `"docker" "rm" "-f" "770377d1ecd5bd3360a066e7a07be0937e8fd1557ea52f4091ccc0869cc38dd3"`
[INFO] [stdout] 770377d1ecd5bd3360a066e7a07be0937e8fd1557ea52f4091ccc0869cc38dd3