[INFO] fetching crate ethers-middleware 0.2.0...
[INFO] checking ethers-middleware-0.2.0 against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] extracting crate ethers-middleware 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ethers-middleware 0.2.0 on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ethers-middleware 0.2.0
[INFO] finished tweaking crates.io crate ethers-middleware 0.2.0
[INFO] tweaked toml for crates.io crate ethers-middleware 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ethers-signers v0.2.0
[INFO] [stderr]   Downloaded ethers-providers v0.2.0
[INFO] [stderr]   Downloaded serde-aux v2.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 046420480af7678d3769451c1ea18096c698d25899498559fc86d206038ce6f5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "046420480af7678d3769451c1ea18096c698d25899498559fc86d206038ce6f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "046420480af7678d3769451c1ea18096c698d25899498559fc86d206038ce6f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "046420480af7678d3769451c1ea18096c698d25899498559fc86d206038ce6f5", kill_on_drop: false }`
[INFO] [stdout] 046420480af7678d3769451c1ea18096c698d25899498559fc86d206038ce6f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2da9516f5d93698a8a8b771ba006007b6f4df71f0676f49a2cd8d3e1269afd9e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2da9516f5d93698a8a8b771ba006007b6f4df71f0676f49a2cd8d3e1269afd9e", kill_on_drop: false }`
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[INFO] [stderr]     Checking ethereum-types v0.10.0
[INFO] [stderr]     Checking ethabi-next v13.0.0
[INFO] [stderr]     Checking hyper v0.14.2
[INFO] [stderr]     Checking ethers-core v0.2.0
[INFO] [stderr]     Checking hyper-rustls v0.22.1
[INFO] [stderr]     Checking reqwest v0.11.0
[INFO] [stderr]     Checking ethers-signers v0.2.0
[INFO] [stderr]     Checking ethers-providers v0.2.0
[INFO] [stderr]     Checking ethers-middleware v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `ethers`
[INFO] [stdout]    --> src/signer.rs:300:9
[INFO] [stdout]     |
[INFO] [stdout] 300 |     use ethers::{providers::Provider, signers::LocalWallet};
[INFO] [stdout]     |         ^^^^^^ use of undeclared crate or module `ethers`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Provider`
[INFO] [stdout]    --> src/signer.rs:323:24
[INFO] [stdout]     |
[INFO] [stdout] 323 |         let provider = Provider::try_from("http://localhost:8545").unwrap();
[INFO] [stdout]     |                        ^^^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 299 |     use ethers_providers::Provider;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `LocalWallet` in this scope
[INFO] [stdout]    --> src/signer.rs:325:22
[INFO] [stdout]     |
[INFO] [stdout] 325 |             .parse::<LocalWallet>()
[INFO] [stdout]     |                      ^^^^^^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this type alias
[INFO] [stdout]     |
[INFO] [stdout] 299 |     use ethers_signers::LocalWallet;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryFrom`
[INFO] [stdout]    --> src/signer.rs:301:9
[INFO] [stdout]     |
[INFO] [stdout] 301 |     use std::convert::TryFrom;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `ethers_providers::Ws`
[INFO] [stdout]  --> tests/gas_escalator.rs:6:46
[INFO] [stdout]   |
[INFO] [stdout] 6 | use ethers_providers::{Middleware, Provider, Ws};
[INFO] [stdout]   |                                              ^^ no `Ws` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0698]: type inside `async` block must be known in this context
[INFO] [stdout]   --> tests/gas_escalator.rs:37:52
[INFO] [stdout]    |
[INFO] [stdout] 37 |         .send_transaction(tx.clone().nonce(nonce + 1), None)
[INFO] [stdout]    |                                                    ^ cannot infer type for type `{integer}`
[INFO] [stdout]    |
[INFO] [stdout] note: the type is part of the `async` block because of this `await`
[INFO] [stdout]   --> tests/gas_escalator.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     provider
[INFO] [stdout] 37 | |         .send_transaction(tx.clone().nonce(nonce + 1), None)
[INFO] [stdout] 38 | |         .await
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0698]: type inside `async` block must be known in this context
[INFO] [stdout]   --> tests/gas_escalator.rs:41:52
[INFO] [stdout]    |
[INFO] [stdout] 41 |         .send_transaction(tx.clone().nonce(nonce + 2), None)
[INFO] [stdout]    |                                                    ^ cannot infer type for type `{integer}`
[INFO] [stdout]    |
[INFO] [stdout] note: the type is part of the `async` block because of this `await`
[INFO] [stdout]   --> tests/gas_escalator.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | /     provider
[INFO] [stdout] 41 | |         .send_transaction(tx.clone().nonce(nonce + 2), None)
[INFO] [stdout] 42 | |         .await
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0698.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ethers-middleware`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2da9516f5d93698a8a8b771ba006007b6f4df71f0676f49a2cd8d3e1269afd9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2da9516f5d93698a8a8b771ba006007b6f4df71f0676f49a2cd8d3e1269afd9e", kill_on_drop: false }`
[INFO] [stdout] 2da9516f5d93698a8a8b771ba006007b6f4df71f0676f49a2cd8d3e1269afd9e