[INFO] fetching crate ssb-rpc 0.3.1...
[INFO] checking ssb-rpc-0.3.1 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate ssb-rpc 0.3.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate ssb-rpc 0.3.1 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ssb-rpc 0.3.1
[INFO] finished tweaking crates.io crate ssb-rpc 0.3.1
[INFO] tweaked toml for crates.io crate ssb-rpc 0.3.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded box_stream v0.4.0
[INFO] [stderr]   Downloaded secret_stream v0.2.0
[INFO] [stderr]   Downloaded packet-stream-codec v0.1.0
[INFO] [stderr]   Downloaded atm-io-utils v0.1.0
[INFO] [stderr]   Downloaded muxrpc v0.2.0
[INFO] [stderr]   Downloaded secret_handshake v4.0.0
[INFO] [stderr]   Downloaded atm-async-utils v0.1.2
[INFO] [stderr]   Downloaded multi-producer-sink v0.3.0
[INFO] [stderr]   Downloaded multi-consumer-stream v0.3.0
[INFO] [stderr]   Downloaded ssb-common v0.3.0
[INFO] [stderr]   Downloaded packet-stream v0.5.0
[INFO] [stderr]   Downloaded ssb-keyfile v0.1.2
[INFO] [stderr]   Downloaded ssb-common v0.2.5
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b98ce922c692659b2fd26514e51e64db3d275091329513135f7b2756f432ea23
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "b98ce922c692659b2fd26514e51e64db3d275091329513135f7b2756f432ea23"`
[INFO] [stderr]    Compiling libsodium-sys v0.0.16
[INFO] [stderr]    Compiling secret_handshake v4.0.0
[INFO] [stderr]    Compiling box_stream v0.4.0
[INFO] [stderr]     Checking multi-producer-sink v0.3.0
[INFO] [stderr]     Checking multi-consumer-stream v0.3.0
[INFO] [stderr]     Checking atm-io-utils v0.1.0
[INFO] [stderr]     Checking quickcheck v0.5.0
[INFO] [stderr]     Checking packet-stream-codec v0.1.0
[INFO] [stderr]     Checking atm-async-utils v0.1.2
[INFO] [stderr]     Checking sodiumoxide v0.0.16
[INFO] [stderr]     Checking packet-stream v0.5.0
[INFO] [stderr]     Checking muxrpc v0.2.0
[INFO] [stderr] error[E0635]: unknown feature `unique`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/secret_handshake-4.0.0/src/lib.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(unique)]
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: could not compile `secret_handshake`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b98ce922c692659b2fd26514e51e64db3d275091329513135f7b2756f432ea23"`
[INFO] running `"docker" "rm" "-f" "b98ce922c692659b2fd26514e51e64db3d275091329513135f7b2756f432ea23"`
[INFO] [stdout] b98ce922c692659b2fd26514e51e64db3d275091329513135f7b2756f432ea23