[INFO] fetching crate try-guard 0.2.0...
[INFO] checking try-guard-0.2.0 against nightly-2019-10-27 for pr-65897
[INFO] extracting crate try-guard 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate try-guard 0.2.0 on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate try-guard 0.2.0
[INFO] finished tweaking crates.io crate try-guard 0.2.0
[INFO] tweaked toml for crates.io crate try-guard 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=allow" "-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" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 408b483f0de49a357787489921f69794fb6bad3ab3fe75a76ade1d8e944d613b
[INFO] running `"docker" "start" "-a" "408b483f0de49a357787489921f69794fb6bad3ab3fe75a76ade1d8e944d613b"`
[INFO] [stderr]     Checking try-guard v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: `try` blocks are unstable
[INFO] [stderr]   --> tests/verify.rs:23:27
[INFO] [stderr]    |
[INFO] [stderr] 23 |       let foo: Option<()> = try {
[INFO] [stderr]    |  ___________________________^
[INFO] [stderr] 24 | |       verify!(1 < 2)?
[INFO] [stderr] 25 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
[INFO] [stderr]    = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `try` blocks are unstable
[INFO] [stderr]   --> tests/verify.rs:31:27
[INFO] [stderr]    |
[INFO] [stderr] 31 |       let foo: Option<()> = try {
[INFO] [stderr]    |  ___________________________^
[INFO] [stderr] 32 | |       verify!(1 > 2)?
[INFO] [stderr] 33 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
[INFO] [stderr]    = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `try` blocks are unstable
[INFO] [stderr]   --> tests/guard.rs:31:28
[INFO] [stderr]    |
[INFO] [stderr] 31 |       let foo: Option<i32> = try {
[INFO] [stderr]    |  ____________________________^
[INFO] [stderr] 32 | |       guard!(1 < 2);
[INFO] [stderr] 33 | |       10
[INFO] [stderr] 34 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
[INFO] [stderr]    = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `try` blocks are unstable
[INFO] [stderr]   --> tests/guard.rs:41:28
[INFO] [stderr]    |
[INFO] [stderr] 41 |       let foo: Option<i32> = try {
[INFO] [stderr]    |  ____________________________^
[INFO] [stderr] 42 | |       guard!(1 > 2);
[INFO] [stderr] 43 | |       10
[INFO] [stderr] 44 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
[INFO] [stderr]    = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `try` blocks are unstable
[INFO] [stderr]   --> tests/guard.rs:60:41
[INFO] [stderr]    |
[INFO] [stderr] 60 |       let foo: Result<i32, CustomError> = try {
[INFO] [stderr]    |  _________________________________________^
[INFO] [stderr] 61 | |       guard!(1 < 2);
[INFO] [stderr] 62 | |       10
[INFO] [stderr] 63 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
[INFO] [stderr]    = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: `try` blocks are unstable
[INFO] [stderr]   --> tests/guard.rs:70:41
[INFO] [stderr]    |
[INFO] [stderr] 70 |       let foo: Result<i32, CustomError> = try {
[INFO] [stderr]    |  _________________________________________^
[INFO] [stderr] 71 | |       guard!(1 > 2);
[INFO] [stderr] 72 | |       10
[INFO] [stderr] 73 | |     };
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
[INFO] [stderr]    = help: add `#![feature(try_blocks)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `try-guard`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `try-guard`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "408b483f0de49a357787489921f69794fb6bad3ab3fe75a76ade1d8e944d613b"`
[INFO] running `"docker" "rm" "-f" "408b483f0de49a357787489921f69794fb6bad3ab3fe75a76ade1d8e944d613b"`
[INFO] [stdout] 408b483f0de49a357787489921f69794fb6bad3ab3fe75a76ade1d8e944d613b