Sep 10 13:46:10.179 INFO checking num-bigint-0.2.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 13:46:10.179 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 13:46:10.179 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/try#3a2610c2a16575649896925631bf8cec4f4b1961:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 13:46:10.407 INFO blam! 7c82e5c30f24df1bbe987339f2f7f16c68b716bad35808fe7e6d2e9dbbbf235f
Sep 10 13:46:10.409 INFO running `"docker" "start" "-a" "7c82e5c30f24df1bbe987339f2f7f16c68b716bad35808fe7e6d2e9dbbbf235f"`
Sep 10 13:46:11.350 INFO kablam! usermod: no changes
Sep 10 13:46:11.470 INFO kablam!    Compiling num-bigint v0.2.0 (file:///source)
Sep 10 13:46:17.226 INFO kablam! error[E0464]: multiple matching crates for `rand`
Sep 10 13:46:17.226 INFO kablam!  --> benches/bigint.rs:6:1
Sep 10 13:46:17.226 INFO kablam!   |
Sep 10 13:46:17.226 INFO kablam! 6 | extern crate rand;
Sep 10 13:46:17.226 INFO kablam!   | ^^^^^^^^^^^^^^^^^^
Sep 10 13:46:17.226 INFO kablam!   |
Sep 10 13:46:17.226 INFO kablam!   = note: candidates:
Sep 10 13:46:17.226 INFO kablam!           crate `rand`: /rustup-home/toolchains/3a2610c2a16575649896925631bf8cec4f4b1961-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librand-f0493c8bbd1f43af.rlib
Sep 10 13:46:17.226 INFO kablam!           crate `rand`: /rustup-home/toolchains/3a2610c2a16575649896925631bf8cec4f4b1961-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librand-bff0435c047676fa.rlib
Sep 10 13:46:17.226 INFO kablam! 
Sep 10 13:46:17.226 INFO kablam! error[E0463]: can't find crate for `rand`
Sep 10 13:46:17.226 INFO kablam!  --> benches/bigint.rs:6:1
Sep 10 13:46:17.226 INFO kablam!   |
Sep 10 13:46:17.226 INFO kablam! 6 | extern crate rand;
Sep 10 13:46:17.226 INFO kablam!   | ^^^^^^^^^^^^^^^^^^ can't find crate
Sep 10 13:46:17.226 INFO kablam! 
Sep 10 13:46:17.226 INFO kablam! error: aborting due to 2 previous errors
Sep 10 13:46:17.226 INFO kablam! 
Sep 10 13:46:17.226 INFO kablam! Some errors occurred: E0463, E0464.
Sep 10 13:46:17.226 INFO kablam! For more information about an error, try `rustc --explain E0463`.
Sep 10 13:46:17.250 INFO kablam! error: Could not compile `num-bigint`.
Sep 10 13:46:17.250 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 10 13:46:21.206 INFO kablam! warning: unused arithmetic operation which must be used
Sep 10 13:46:21.206 INFO kablam!    --> tests/biguint.rs:769:5
Sep 10 13:46:21.206 INFO kablam!     |
Sep 10 13:46:21.206 INFO kablam! 769 |     a - b;
Sep 10 13:46:21.206 INFO kablam!     |     ^^^^^
Sep 10 13:46:21.206 INFO kablam!     |
Sep 10 13:46:21.206 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Sep 10 13:46:21.206 INFO kablam! 
Sep 10 13:46:21.320 INFO kablam! error: build failed
Sep 10 13:46:21.321 INFO kablam! su: No module specific data is present
Sep 10 13:46:21.876 INFO running `"docker" "rm" "-f" "7c82e5c30f24df1bbe987339f2f7f16c68b716bad35808fe7e6d2e9dbbbf235f"`
Sep 10 13:46:21.979 INFO blam! 7c82e5c30f24df1bbe987339f2f7f16c68b716bad35808fe7e6d2e9dbbbf235f