[INFO] updating cached repository https://github.com/frewsxcv/heroku-tiny-http-hello-world
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c4bcd2878c59865b0e4db78925ea4718764ee19e
[INFO] testing frewsxcv/heroku-tiny-http-hello-world against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrewsxcv%2Fheroku-tiny-http-hello-world" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/frewsxcv/heroku-tiny-http-hello-world on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/frewsxcv/heroku-tiny-http-hello-world
[INFO] finished tweaking git repo https://github.com/frewsxcv/heroku-tiny-http-hello-world
[INFO] tweaked toml for git repo https://github.com/frewsxcv/heroku-tiny-http-hello-world written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/frewsxcv/heroku-tiny-http-hello-world already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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=warn" "-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" "+beta-2020-06-03" "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] edcb0d6ce86cbb65963330420031369bd96cafb5606be09f4d79f7ba2c72296e
[INFO] running `"docker" "start" "-a" "edcb0d6ce86cbb65963330420031369bd96cafb5606be09f4d79f7ba2c72296e"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling chunked_transfer v1.1.0
[INFO] [stderr]    Compiling ascii v1.0.0
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling tiny_http v0.7.0
[INFO] [stderr]    Compiling heroku-tiny-http-hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `tiny_http::ServerBuilder`
[INFO] [stderr]  --> src/main.rs:5:27
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tiny_http::{Response, ServerBuilder};
[INFO] [stderr]   |                           ^^^^^^^^^^^^^ no `ServerBuilder` in the root
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `heroku-tiny-http-hello-world`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "edcb0d6ce86cbb65963330420031369bd96cafb5606be09f4d79f7ba2c72296e"`
[INFO] running `"docker" "rm" "-f" "edcb0d6ce86cbb65963330420031369bd96cafb5606be09f4d79f7ba2c72296e"`
[INFO] [stdout] edcb0d6ce86cbb65963330420031369bd96cafb5606be09f4d79f7ba2c72296e