[INFO] crate upgradedb4pg 0.1.0 is already in cache
[INFO] checking upgradedb4pg-0.1.0 against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] extracting crate upgradedb4pg 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate upgradedb4pg 0.1.0 on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate upgradedb4pg 0.1.0
[INFO] finished tweaking crates.io crate upgradedb4pg 0.1.0
[INFO] tweaked toml for crates.io crate upgradedb4pg 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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] cfb3b9de65aa8e606028b74f43eb24a2ee1df8f4526b3a1aa848a8d5c28c20dd
[INFO] running `"docker" "start" "-a" "cfb3b9de65aa8e606028b74f43eb24a2ee1df8f4526b3a1aa848a8d5c28c20dd"`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking arrayref v0.3.5
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking md5 v0.3.8
[INFO] [stderr]     Checking fallible-iterator v0.1.6
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking hex v0.2.0
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking memchr v2.3.0
[INFO] [stderr]     Checking stringprep v0.1.2
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking crypto-mac v0.5.2
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking hmac v0.5.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking backtrace v0.3.42
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking postgres-protocol v0.3.2
[INFO] [stderr]     Checking postgres-shared v0.4.2
[INFO] [stderr]     Checking postgres v0.15.2
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]     Checking rustyline v2.1.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr] error[E0283]: type annotations needed for `std::result::Result<std::string::String, error::ReadlineError>`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustyline-2.1.0/src/lib.rs:639:43
[INFO] [stderr]     |
[INFO] [stderr] 636 |     let user_input = readline_edit(prompt, initial, editor, &original_mode);
[INFO] [stderr]     |         ---------- consider giving `user_input` the explicit type `std::result::Result<std::string::String, error::ReadlineError>`, where the type parameter `std::string::String` is specified
[INFO] [stderr] ...
[INFO] [stderr] 639 |             editor.add_history_entry(line.as_ref());
[INFO] [stderr]     |                                           ^^^^^^ cannot infer type for struct `std::string::String`
[INFO] [stderr]     |
[INFO] [stderr]     = note: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0283]: type annotations needed for `std::result::Result<std::string::String, std::io::Error>`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustyline-2.1.0/src/history.rs:150:33
[INFO] [stderr]     |
[INFO] [stderr] 149 |         for line in rdr.lines() {
[INFO] [stderr]     |                     ----------- the element type for this iterator is not specified
[INFO] [stderr] 150 |             self.add(try!(line).as_ref()); // TODO truncate to MAX_LINE
[INFO] [stderr]     |                                 ^^^^^^ cannot infer type for struct `std::string::String`
[INFO] [stderr]     |
[INFO] [stderr]     = note: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: could not compile `rustyline`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "cfb3b9de65aa8e606028b74f43eb24a2ee1df8f4526b3a1aa848a8d5c28c20dd"`
[INFO] running `"docker" "rm" "-f" "cfb3b9de65aa8e606028b74f43eb24a2ee1df8f4526b3a1aa848a8d5c28c20dd"`
[INFO] [stdout] cfb3b9de65aa8e606028b74f43eb24a2ee1df8f4526b3a1aa848a8d5c28c20dd