[INFO] crate mongo-file-center 0.4.0 is already in cache
[INFO] testing mongo-file-center-0.4.0 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate mongo-file-center 0.4.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mongo-file-center 0.4.0 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mongo-file-center 0.4.0
[INFO] finished tweaking crates.io crate mongo-file-center 0.4.0
[INFO] tweaked toml for crates.io crate mongo-file-center 0.4.0 written to /workspace/builds/worker-0/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-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=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] 6a2cb5ebd4d6370ab69826002247644250dbe587797cea219689a263040ecd66
[INFO] running `"docker" "start" "-a" "6a2cb5ebd4d6370ab69826002247644250dbe587797cea219689a263040ecd66"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling keccak v0.1.0
[INFO] [stderr]    Compiling base32 v0.4.0
[INFO] [stderr]    Compiling separator v0.4.1
[INFO] [stderr]    Compiling base64-url v1.1.13
[INFO] [stderr]    Compiling short-crypt v1.0.15
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling sha-1 v0.8.2
[INFO] [stderr]    Compiling md-5 v0.8.0
[INFO] [stderr]    Compiling sha3 v0.8.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling scan_fmt v0.1.3
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling pbkdf2 v0.3.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling bson v0.14.1
[INFO] [stderr]    Compiling textnonce v0.6.5
[INFO] [stderr]    Compiling mongodb v0.4.0
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mongodb-0.4.0/src/db/mod.rs:350:37
[INFO] [stderr]     |
[INFO] [stderr] 350 |                 doc.insert("roles", Vec::new());
[INFO] [stderr]     |                                     ^^^^^^^^ cannot infer type for type parameter `T`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: could not compile `mongodb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6a2cb5ebd4d6370ab69826002247644250dbe587797cea219689a263040ecd66"`
[INFO] running `"docker" "rm" "-f" "6a2cb5ebd4d6370ab69826002247644250dbe587797cea219689a263040ecd66"`
[INFO] [stdout] 6a2cb5ebd4d6370ab69826002247644250dbe587797cea219689a263040ecd66