[INFO] crate libconfig 0.1.3 is already in cache
[INFO] testing libconfig-0.1.3 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate libconfig 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate libconfig 0.1.3 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate libconfig 0.1.3
[INFO] finished tweaking crates.io crate libconfig 0.1.3
[INFO] tweaked toml for crates.io crate libconfig 0.1.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "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] 7a8494799e4d1ef50afd6888ac44fb03167ea0cdb958928a43c2499eb9d45f87
[INFO] running `"docker" "start" "-a" "7a8494799e4d1ef50afd6888ac44fb03167ea0cdb958928a43c2499eb9d45f87"`
[INFO] [stderr]    Compiling libconfig v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/error.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         try!(write!(f, "{}", self.description()));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:54:35
[INFO] [stderr]    |
[INFO] [stderr] 54 |         try!(write!(f, "{}", self.description()));
[INFO] [stderr]    |                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.04s
[INFO] running `"docker" "inspect" "7a8494799e4d1ef50afd6888ac44fb03167ea0cdb958928a43c2499eb9d45f87"`
[INFO] running `"docker" "rm" "-f" "7a8494799e4d1ef50afd6888ac44fb03167ea0cdb958928a43c2499eb9d45f87"`
[INFO] [stdout] 7a8494799e4d1ef50afd6888ac44fb03167ea0cdb958928a43c2499eb9d45f87
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3d974d2f3d3d7f8265ea888650913f85cd175b23b92d32c358bbe928d8b9d4d0
[INFO] running `"docker" "start" "-a" "3d974d2f3d3d7f8265ea888650913f85cd175b23b92d32c358bbe928d8b9d4d0"`
[INFO] [stderr]    Compiling libconfig v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/error.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         try!(write!(f, "{}", self.description()));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:54:35
[INFO] [stderr]    |
[INFO] [stderr] 54 |         try!(write!(f, "{}", self.description()));
[INFO] [stderr]    |                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `config`
[INFO] [stderr]  --> tests/from_file.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate config;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `libconfig`.
[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] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/error.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         try!(write!(f, "{}", self.description()));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:54:35
[INFO] [stderr]    |
[INFO] [stderr] 54 |         try!(write!(f, "{}", self.description()));
[INFO] [stderr]    |                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3d974d2f3d3d7f8265ea888650913f85cd175b23b92d32c358bbe928d8b9d4d0"`
[INFO] running `"docker" "rm" "-f" "3d974d2f3d3d7f8265ea888650913f85cd175b23b92d32c358bbe928d8b9d4d0"`
[INFO] [stdout] 3d974d2f3d3d7f8265ea888650913f85cd175b23b92d32c358bbe928d8b9d4d0