[INFO] fetching crate split-buffer 0.1.0...
[INFO] testing split-buffer-0.1.0 against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] extracting crate split-buffer 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate split-buffer 0.1.0 on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate split-buffer 0.1.0
[INFO] finished tweaking crates.io crate split-buffer 0.1.0
[INFO] tweaked toml for crates.io crate split-buffer 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate split-buffer 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "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] 4d00e13c1872526e3d037a5011842f8b88ed2296b5f2bf8d54e1865da0274aee
[INFO] running `Command { std: "docker" "start" "-a" "4d00e13c1872526e3d037a5011842f8b88ed2296b5f2bf8d54e1865da0274aee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d00e13c1872526e3d037a5011842f8b88ed2296b5f2bf8d54e1865da0274aee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d00e13c1872526e3d037a5011842f8b88ed2296b5f2bf8d54e1865da0274aee", kill_on_drop: false }`
[INFO] [stdout] 4d00e13c1872526e3d037a5011842f8b88ed2296b5f2bf8d54e1865da0274aee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "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] 6f70c2b9b461d81b7249c15305d515f53d6b47f3c3dbdbcb95ca51e9fe62e76a
[INFO] running `Command { std: "docker" "start" "-a" "6f70c2b9b461d81b7249c15305d515f53d6b47f3c3dbdbcb95ca51e9fe62e76a", kill_on_drop: false }`
[INFO] [stderr]    Compiling split-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "6f70c2b9b461d81b7249c15305d515f53d6b47f3c3dbdbcb95ca51e9fe62e76a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f70c2b9b461d81b7249c15305d515f53d6b47f3c3dbdbcb95ca51e9fe62e76a", kill_on_drop: false }`
[INFO] [stdout] 6f70c2b9b461d81b7249c15305d515f53d6b47f3c3dbdbcb95ca51e9fe62e76a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--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] 1c1a0784894bbffa511ebdc111c9de53d4cae6b9758382937d0e2e64ab148623
[INFO] running `Command { std: "docker" "start" "-a" "1c1a0784894bbffa511ebdc111c9de53d4cae6b9758382937d0e2e64ab148623", kill_on_drop: false }`
[INFO] [stderr]    Compiling split-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `Buffer` doesn't implement `Debug`
[INFO] [stdout]  --> examples/simple.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     println!("{:?}", &buf);
[INFO] [stdout]   |                      ^^^^ `Buffer` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Debug` is not implemented for `Buffer`
[INFO] [stdout]   = note: required because of the requirements on the impl of `Debug` for `&Buffer`
[INFO] [stdout]   = note: required by `std::fmt::Debug::fmt`
[INFO] [stdout]   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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 E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `split-buffer`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1c1a0784894bbffa511ebdc111c9de53d4cae6b9758382937d0e2e64ab148623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c1a0784894bbffa511ebdc111c9de53d4cae6b9758382937d0e2e64ab148623", kill_on_drop: false }`
[INFO] [stdout] 1c1a0784894bbffa511ebdc111c9de53d4cae6b9758382937d0e2e64ab148623