Sep 17 16:50:11.051 INFO checking stacktrace-0.2.1 against master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690 for pr-54033
Sep 17 16:50:11.051 INFO running: cargo +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets
Sep 17 16:50:11.051 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54033/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-7/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/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 +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 16:50:11.254 INFO blam! 61dae5250fe678c42178665a8d960cde5bf8211ebe112422c69ace3dec45b49b
Sep 17 16:50:11.257 INFO running `"docker" "start" "-a" "61dae5250fe678c42178665a8d960cde5bf8211ebe112422c69ace3dec45b49b"`
Sep 17 16:50:11.927 INFO kablam! usermod: no changes
Sep 17 16:50:12.024 INFO kablam!     Checking stacktrace v0.2.1 (/source)
Sep 17 16:50:13.002 INFO kablam! warning: unused import: `std::fmt::Debug`
Sep 17 16:50:13.002 INFO kablam!  --> examples/using_result/main.rs:3:5
Sep 17 16:50:13.002 INFO kablam!   |
Sep 17 16:50:13.002 INFO kablam! 3 | use std::fmt::Debug;
Sep 17 16:50:13.002 INFO kablam!   |     ^^^^^^^^^^^^^^^
Sep 17 16:50:13.002 INFO kablam!   |
Sep 17 16:50:13.002 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 17 16:50:13.002 INFO kablam! 
Sep 17 16:50:13.095 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
Sep 17 16:50:13.102 INFO kablam! su: No module specific data is present
Sep 17 16:50:13.789 INFO running `"docker" "rm" "-f" "61dae5250fe678c42178665a8d960cde5bf8211ebe112422c69ace3dec45b49b"`
Sep 17 16:50:13.982 INFO blam! 61dae5250fe678c42178665a8d960cde5bf8211ebe112422c69ace3dec45b49b