[INFO] crate tangle 0.4.0 is already in cache
[INFO] extracting crate tangle 0.4.0 into work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/tangle/0.4.0
[INFO] extracting crate tangle 0.4.0 into work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/tangle/0.4.0
[INFO] validating manifest of tangle-0.4.0 on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tangle-0.4.0 on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tangle-0.4.0
[INFO] finished frobbing tangle-0.4.0
[INFO] frobbed toml for tangle-0.4.0 written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/tangle/0.4.0/Cargo.toml
[INFO] started frobbing tangle-0.4.0
[INFO] finished frobbing tangle-0.4.0
[INFO] frobbed toml for tangle-0.4.0 written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/tangle/0.4.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tangle-0.4.0 against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-6/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/tangle/0.4.0:/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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0c11a416dd4c45678b8962a5e73c0a4619d74be4bd42f2d43f25eedf8cd10bd6
[INFO] running `"docker" "start" "-a" "0c11a416dd4c45678b8962a5e73c0a4619d74be4bd42f2d43f25eedf8cd10bd6"`
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking tangle v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::convert;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions.
[INFO] [stderr]    --> src/lib.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 | impl<T, E=()> Future<T, E>
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(invalid_type_param_default)] on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `tangle`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::convert;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Receiver`, `Sender`
[INFO] [stderr]    --> src/lib.rs:368:36
[INFO] [stderr]     |
[INFO] [stderr] 368 |     use std::sync::mpsc::{channel, Receiver, Sender};
[INFO] [stderr]     |                                    ^^^^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions.
[INFO] [stderr]    --> src/lib.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 | impl<T, E=()> Future<T, E>
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(invalid_type_param_default)] on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `tangle`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0c11a416dd4c45678b8962a5e73c0a4619d74be4bd42f2d43f25eedf8cd10bd6"`
[INFO] running `"docker" "rm" "-f" "0c11a416dd4c45678b8962a5e73c0a4619d74be4bd42f2d43f25eedf8cd10bd6"`
[INFO] [stdout] 0c11a416dd4c45678b8962a5e73c0a4619d74be4bd42f2d43f25eedf8cd10bd6