[INFO] fetching crate qecs-core 0.0.17...
[INFO] checking qecs-core-0.0.17 against master#c724b67e1b474262917a5154d74e7072267593fe for pr-74315
[INFO] extracting crate qecs-core 0.0.17 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate qecs-core 0.0.17 on toolchain c724b67e1b474262917a5154d74e7072267593fe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 86db32d34d539ba7ed9d8e2e4fab07e8471da8d92b2410bec840e0c4e9042996
[INFO] running `Command { std: "docker" "start" "-a" "86db32d34d539ba7ed9d8e2e4fab07e8471da8d92b2410bec840e0c4e9042996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86db32d34d539ba7ed9d8e2e4fab07e8471da8d92b2410bec840e0c4e9042996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86db32d34d539ba7ed9d8e2e4fab07e8471da8d92b2410bec840e0c4e9042996", kill_on_drop: false }`
[INFO] [stdout] 86db32d34d539ba7ed9d8e2e4fab07e8471da8d92b2410bec840e0c4e9042996
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d934ef4a7a2d4932e6d51aff35bf6ffb4166699c30a980206ef66df8e4bcb4d4
[INFO] running `Command { std: "docker" "start" "-a" "d934ef4a7a2d4932e6d51aff35bf6ffb4166699c30a980206ef66df8e4bcb4d4", kill_on_drop: false }`
[INFO] [stderr]     Checking downcast v0.2.3
[INFO] [stdout] error[E0599]: no method named `get_type_id` found for reference `&T` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/downcast-0.2.3/src/lib.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     obj.get_type_id()
[INFO] [stdout]    |         ^^^^^^^^^^^ method not found in `&T`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `downcast`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d934ef4a7a2d4932e6d51aff35bf6ffb4166699c30a980206ef66df8e4bcb4d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d934ef4a7a2d4932e6d51aff35bf6ffb4166699c30a980206ef66df8e4bcb4d4", kill_on_drop: false }`
[INFO] [stdout] d934ef4a7a2d4932e6d51aff35bf6ffb4166699c30a980206ef66df8e4bcb4d4