Nov 17 21:10:11.691 INFO testing tangle-0.4.0 against try#2e026d6e5d7621634147ad4c8074f1d964dbb1be for pr-55982
Nov 17 21:10:11.691 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-1/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +2e026d6e5d7621634147ad4c8074f1d964dbb1be-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 17 21:10:12.079 INFO [stdout] 472eecdc4470a9015efde2ce2d0e13b8e8efddb4b843ac6b331ec26d60eeb4f5
Nov 17 21:10:12.081 INFO running `"docker" "start" "-a" "472eecdc4470a9015efde2ce2d0e13b8e8efddb4b843ac6b331ec26d60eeb4f5"`
Nov 17 21:10:13.139 INFO [stderr] usermod: no changes
Nov 17 21:10:13.205 INFO [stderr]    Compiling tangle v0.4.0 (/source)
Nov 17 21:10:13.568 INFO [stderr] warning: unused import: `std::thread`
Nov 17 21:10:13.568 INFO [stderr]  --> src/lib.rs:7:5
Nov 17 21:10:13.568 INFO [stderr]   |
Nov 17 21:10:13.568 INFO [stderr] 7 | use std::thread;
Nov 17 21:10:13.568 INFO [stderr]   |     ^^^^^^^^^^^
Nov 17 21:10:13.568 INFO [stderr]   |
Nov 17 21:10:13.568 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 17 21:10:13.568 INFO [stderr] 
Nov 17 21:10:13.568 INFO [stderr] warning: unused import: `std::convert`
Nov 17 21:10:13.568 INFO [stderr]   --> src/lib.rs:10:5
Nov 17 21:10:13.568 INFO [stderr]    |
Nov 17 21:10:13.568 INFO [stderr] 10 | use std::convert;
Nov 17 21:10:13.568 INFO [stderr]    |     ^^^^^^^^^^^^
Nov 17 21:10:13.568 INFO [stderr] 
Nov 17 21:10:13.568 INFO [stderr] error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions.
Nov 17 21:10:13.568 INFO [stderr]    --> src/lib.rs:178:9
Nov 17 21:10:13.568 INFO [stderr]     |
Nov 17 21:10:13.568 INFO [stderr] 178 | impl<T, E=()> Future<T, E>
Nov 17 21:10:13.568 INFO [stderr]     |         ^
Nov 17 21:10:13.568 INFO [stderr]     |
Nov 17 21:10:13.568 INFO [stderr]     = note: #[deny(invalid_type_param_default)] on by default
Nov 17 21:10:13.568 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!
Nov 17 21:10:13.568 INFO [stderr]     = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
Nov 17 21:10:13.568 INFO [stderr] 
Nov 17 21:10:13.568 INFO [stderr] error: aborting due to previous error
Nov 17 21:10:13.568 INFO [stderr] 
Nov 17 21:10:13.574 INFO [stderr] error: Could not compile `tangle`.
Nov 17 21:10:13.574 INFO [stderr] 
Nov 17 21:10:13.574 INFO [stderr] To learn more, run the command again with --verbose.
Nov 17 21:10:13.575 INFO [stderr] su: No module specific data is present
Nov 17 21:10:14.179 INFO running `"docker" "inspect" "472eecdc4470a9015efde2ce2d0e13b8e8efddb4b843ac6b331ec26d60eeb4f5"`
Nov 17 21:10:14.465 INFO running `"docker" "rm" "-f" "472eecdc4470a9015efde2ce2d0e13b8e8efddb4b843ac6b331ec26d60eeb4f5"`
Nov 17 21:10:14.743 INFO [stdout] 472eecdc4470a9015efde2ce2d0e13b8e8efddb4b843ac6b331ec26d60eeb4f5