[INFO] crate qecs-core 0.0.17 is already in cache
[INFO] testing qecs-core-0.0.17 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate qecs-core 0.0.17 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate qecs-core 0.0.17 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate qecs-core 0.0.17
[INFO] finished tweaking crates.io crate qecs-core 0.0.17
[INFO] tweaked toml for crates.io crate qecs-core 0.0.17 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0b5edda043758a0a4ef4348c2434af778b5ebf6412c9561a9ee4780c8cb50204
[INFO] running `"docker" "start" "-a" "0b5edda043758a0a4ef4348c2434af778b5ebf6412c9561a9ee4780c8cb50204"`
[INFO] [stderr]    Compiling downcast v0.2.3
[INFO] [stderr] error[E0599]: no method named `get_type_id` found for reference `&T` in the current scope
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.2.3/src/lib.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     obj.get_type_id()
[INFO] [stderr]    |         ^^^^^^^^^^^ method not found in `&T`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `downcast`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0b5edda043758a0a4ef4348c2434af778b5ebf6412c9561a9ee4780c8cb50204"`
[INFO] running `"docker" "rm" "-f" "0b5edda043758a0a4ef4348c2434af778b5ebf6412c9561a9ee4780c8cb50204"`
[INFO] [stdout] 0b5edda043758a0a4ef4348c2434af778b5ebf6412c9561a9ee4780c8cb50204