[INFO] updating cached repository https://github.com/leshow/rust-filter-map-reduce-bench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] be964def3658f3365e1f356643269ac6bb5f3734
[INFO] testing leshow/rust-filter-map-reduce-bench against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleshow%2Frust-filter-map-reduce-bench" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leshow/rust-filter-map-reduce-bench on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leshow/rust-filter-map-reduce-bench
[INFO] finished tweaking git repo https://github.com/leshow/rust-filter-map-reduce-bench
[INFO] tweaked toml for git repo https://github.com/leshow/rust-filter-map-reduce-bench written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/leshow/rust-filter-map-reduce-bench already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "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] bdb381dce128a75d31c2506d26edde769d860c0fe15ce73a89e6481144e2a5c9
[INFO] running `Command { std: "docker" "start" "-a" "bdb381dce128a75d31c2506d26edde769d860c0fe15ce73a89e6481144e2a5c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdb381dce128a75d31c2506d26edde769d860c0fe15ce73a89e6481144e2a5c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdb381dce128a75d31c2506d26edde769d860c0fe15ce73a89e6481144e2a5c9", kill_on_drop: false }`
[INFO] [stdout] bdb381dce128a75d31c2506d26edde769d860c0fe15ce73a89e6481144e2a5c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--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] 4eb99ca83ea323defcb570e37d2d7cf885285c806f51307c4b932ec5f56c4828
[INFO] running `Command { std: "docker" "start" "-a" "4eb99ca83ea323defcb570e37d2d7cf885285c806f51307c4b932ec5f56c4828", kill_on_drop: false }`
[INFO] [stderr]    Compiling fold-test v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/main.rs:23:14
[INFO] [stdout]    |
[INFO] [stdout] 23 |     for x in (0..iterations) {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `fold_test`
[INFO] [stdout]   --> src/main.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / #![feature(test)]
[INFO] [stdout] 2  | |
[INFO] [stdout] 3  | | extern crate test;
[INFO] [stdout] 4  | |
[INFO] [stdout] ...  |
[INFO] [stdout] 47 | |     }
[INFO] [stdout] 48 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fold-test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "4eb99ca83ea323defcb570e37d2d7cf885285c806f51307c4b932ec5f56c4828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4eb99ca83ea323defcb570e37d2d7cf885285c806f51307c4b932ec5f56c4828", kill_on_drop: false }`
[INFO] [stdout] 4eb99ca83ea323defcb570e37d2d7cf885285c806f51307c4b932ec5f56c4828