[INFO] fetching crate pair_stack 0.1.0...
[INFO] testing pair_stack-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate pair_stack 0.1.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate pair_stack 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pair_stack 0.1.0
[INFO] finished tweaking crates.io crate pair_stack 0.1.0
[INFO] tweaked toml for crates.io crate pair_stack 0.1.0 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abc00bf4d95d661b61ce3a298cbf45a5e2d3be98f932ec1a1789d9874ea6f6c1
[INFO] running `Command { std: "docker" "start" "-a" "abc00bf4d95d661b61ce3a298cbf45a5e2d3be98f932ec1a1789d9874ea6f6c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abc00bf4d95d661b61ce3a298cbf45a5e2d3be98f932ec1a1789d9874ea6f6c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abc00bf4d95d661b61ce3a298cbf45a5e2d3be98f932ec1a1789d9874ea6f6c1", kill_on_drop: false }`
[INFO] [stdout] abc00bf4d95d661b61ce3a298cbf45a5e2d3be98f932ec1a1789d9874ea6f6c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6f0df0975ec2d7c99ca73bfd0b77fa5a50beb3975115808436070d494992792
[INFO] running `Command { std: "docker" "start" "-a" "f6f0df0975ec2d7c99ca73bfd0b77fa5a50beb3975115808436070d494992792", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling subtle v2.4.1
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling modifier v0.1.0
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling sequence_trie v0.3.6
[INFO] [stderr]    Compiling route-recognizer v0.1.13
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling http-body v0.4.3
[INFO] [stderr]    Compiling sha2 v0.9.8
[INFO] [stderr]    Compiling md-5 v0.9.1
[INFO] [stderr]    Compiling crypto-mac v0.10.1
[INFO] [stderr]    Compiling tinyvec v1.3.1
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling unsafe-any v0.4.2
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling hmac v0.10.1
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling plugin v0.2.6
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.5
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling r2d2 v0.8.9
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling postgres-protocol v0.6.1
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling postgres-types v0.2.1
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling tokio-util v0.6.8
[INFO] [stderr]    Compiling iron v0.6.1
[INFO] [stderr]    Compiling mount v0.4.0
[INFO] [stderr]    Compiling router v0.6.0
[INFO] [stderr]    Compiling persistent v0.4.0
[INFO] [stderr]    Compiling staticfile v0.5.0
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]    Compiling hyper v0.14.12
[INFO] [stderr]    Compiling futures v0.3.17
[INFO] [stderr]    Compiling tokio-postgres v0.7.2
[INFO] [stderr]    Compiling postgres v0.19.1
[INFO] [stderr]    Compiling r2d2_postgres v0.18.1
[INFO] [stderr]    Compiling pair_stack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `postgres::SslMode`
[INFO] [stdout]   --> src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use postgres::SslMode;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^ no `SslMode` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `hyper::method`
[INFO] [stdout]   --> src/lib.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | use hyper::method::Method;
[INFO] [stdout]    |            ^^^^^^ could not find `method` in `hyper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: struct `Config` is private
[INFO] [stdout]   --> src/lib.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | use r2d2::Config;
[INFO] [stdout]    |           ^^^^^^ private struct
[INFO] [stdout]    |
[INFO] [stdout] note: the struct `Config` is defined here
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/r2d2-0.8.9/src/lib.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | use crate::config::Config;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: missing generics for struct `PostgresConnectionManager`
[INFO] [stdout]   --> src/lib.rs:47:30
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub type PostgresPool = Pool<PostgresConnectionManager>;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^ expected 1 generic argument
[INFO] [stdout]    |
[INFO] [stdout] note: struct defined here, with 1 generic parameter: `T`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/r2d2_postgres-0.18.1/src/lib.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct PostgresConnectionManager<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^ -
[INFO] [stdout] help: add missing generic argument
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub type PostgresPool = Pool<PostgresConnectionManager<T>>;
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: missing generics for struct `PostgresConnectionManager`
[INFO] [stdout]   --> src/lib.rs:48:54
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub type PostgresPooledConnection = PooledConnection<PostgresConnectionManager>;
[INFO] [stdout]    |                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^ expected 1 generic argument
[INFO] [stdout]    |
[INFO] [stdout] note: struct defined here, with 1 generic parameter: `T`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/r2d2_postgres-0.18.1/src/lib.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct PostgresConnectionManager<T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^ -
[INFO] [stdout] help: add missing generic argument
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub type PostgresPooledConnection = PooledConnection<PostgresConnectionManager<T>>;
[INFO] [stdout]    |                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pair_stack` due to 6 previous errors
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] Some errors have detailed explanations: E0107, E0432, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0107`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f6f0df0975ec2d7c99ca73bfd0b77fa5a50beb3975115808436070d494992792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6f0df0975ec2d7c99ca73bfd0b77fa5a50beb3975115808436070d494992792", kill_on_drop: false }`
[INFO] [stdout] f6f0df0975ec2d7c99ca73bfd0b77fa5a50beb3975115808436070d494992792