[INFO] fetching crate rustcov 0.0.0...
[INFO] testing rustcov-0.0.0 against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] extracting crate rustcov 0.0.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate rustcov 0.0.0 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 crates.io crate rustcov 0.0.0
[INFO] finished tweaking crates.io crate rustcov 0.0.0
[INFO] tweaked toml for crates.io crate rustcov 0.0.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 236588989eb7a58ac3ed76e6ef6976451ed3eee9749df48c5082ee85000d2def
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "236588989eb7a58ac3ed76e6ef6976451ed3eee9749df48c5082ee85000d2def", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "236588989eb7a58ac3ed76e6ef6976451ed3eee9749df48c5082ee85000d2def", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "236588989eb7a58ac3ed76e6ef6976451ed3eee9749df48c5082ee85000d2def", kill_on_drop: false }`
[INFO] [stdout] 236588989eb7a58ac3ed76e6ef6976451ed3eee9749df48c5082ee85000d2def
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f1693a1c526430fa5a79e74ed32354bf9c1301e89a28ebada222dc80d5b528a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0f1693a1c526430fa5a79e74ed32354bf9c1301e89a28ebada222dc80d5b528a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rustcov v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "0f1693a1c526430fa5a79e74ed32354bf9c1301e89a28ebada222dc80d5b528a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f1693a1c526430fa5a79e74ed32354bf9c1301e89a28ebada222dc80d5b528a", kill_on_drop: false }`
[INFO] [stdout] 0f1693a1c526430fa5a79e74ed32354bf9c1301e89a28ebada222dc80d5b528a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "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] b7e7739a6c2df8e87d8eb7502b2da06fc7a99a9baaac1844e95b910c706fd2b9
[INFO] running `Command { std: "docker" "start" "-a" "b7e7739a6c2df8e87d8eb7502b2da06fc7a99a9baaac1844e95b910c706fd2b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustcov v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0457]: plugin `rustcov` only found in rlib format, but must be available in dylib format
[INFO] [stdout]  --> examples/plugin.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![plugin(rustcov)]
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated attribute `plugin`: compiler plugins are deprecated. See https://github.com/rust-lang/rust/pull/64675
[INFO] [stdout]  --> examples/plugin.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![plugin(rustcov)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^ help: may be removed in a future compiler version
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `plugin`
[INFO] [stdout]   --> examples/plugin.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / #![feature(plugin)]
[INFO] [stdout] 2  | | #![plugin(rustcov)]
[INFO] [stdout] 3  | |
[INFO] [stdout] 4  | | fn fizzbuzz(n: i32) -> String {
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |     assert_eq!(fizzbuzz(3), "fizz");
[INFO] [stdout] 15 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `examples/plugin.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 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 `rustcov`.
[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" "b7e7739a6c2df8e87d8eb7502b2da06fc7a99a9baaac1844e95b910c706fd2b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7e7739a6c2df8e87d8eb7502b2da06fc7a99a9baaac1844e95b910c706fd2b9", kill_on_drop: false }`
[INFO] [stdout] b7e7739a6c2df8e87d8eb7502b2da06fc7a99a9baaac1844e95b910c706fd2b9