[INFO] fetching crate pallet-contracts-rpc 0.8.0-alpha.8...
[INFO] checking pallet-contracts-rpc-0.8.0-alpha.8 against try#8a749131e7beb72f6edacefd2bdcbed3d67b2112 for pr-72331
[INFO] extracting crate pallet-contracts-rpc 0.8.0-alpha.8 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate pallet-contracts-rpc 0.8.0-alpha.8 on toolchain 8a749131e7beb72f6edacefd2bdcbed3d67b2112
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate pallet-contracts-rpc 0.8.0-alpha.8
[INFO] finished tweaking crates.io crate pallet-contracts-rpc 0.8.0-alpha.8
[INFO] tweaked toml for crates.io crate pallet-contracts-rpc 0.8.0-alpha.8 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "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] d42cd247f46012a94de896177453e09a1a7679385178fa3c7e24739d516ee2c4
[INFO] running `"docker" "start" "-a" "d42cd247f46012a94de896177453e09a1a7679385178fa3c7e24739d516ee2c4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling asn1_der_derive v0.1.2
[INFO] [stderr]    Compiling libp2p-core-derive v0.18.0
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]     Checking thiserror v1.0.18
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking tiny-bip39 v0.7.3
[INFO] [stderr]     Checking parity-multiaddr v0.8.0
[INFO] [stderr]    Compiling sp-api-proc-macro v2.0.0-alpha.8
[INFO] [stderr]    Compiling jsonrpc-derive v14.0.5
[INFO] [stderr]     Checking parity-scale-codec v1.3.0
[INFO] [stderr]     Checking prometheus v0.8.0
[INFO] [stderr]     Checking curve25519-dalek v2.0.0
[INFO] [stderr]     Checking merlin v2.0.0
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking trie-db v0.20.1
[INFO] [stderr]     Checking lru v0.4.4
[INFO] [stderr]     Checking ed25519-dalek v1.0.0-pre.3
[INFO] [stderr]     Checking schnorrkel v0.9.1
[INFO] [stderr]     Checking asn1_der v0.6.3
[INFO] [stderr]     Checking jsonrpc-core v14.1.0
[INFO] [stderr]     Checking substrate-bip39 v0.4.1
[INFO] [stderr]     Checking jsonrpc-pubsub v14.1.0
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking jsonrpc-client-transports v14.1.0
[INFO] [stderr]     Checking jsonrpc-core-client v14.1.0
[INFO] [stderr]    Compiling libp2p-core v0.18.0
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking broadcaster v1.0.0
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking async-std v1.5.0
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking impl-codec v0.4.2
[INFO] [stderr]     Checking sp-wasm-interface v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-externalities v0.8.0-alpha.8
[INFO] [stderr]     Checking rw-stream-sink v0.2.1
[INFO] [stderr]     Checking multistream-select v0.8.0
[INFO] [stderr]     Checking wasm-timer v0.2.4
[INFO] [stderr]     Checking sp-utils v2.0.0-alpha.8
[INFO] [stderr]     Checking primitive-types v0.7.2
[INFO] [stderr]     Checking parity-util-mem v0.6.1
[INFO] [stderr]     Checking sp-runtime-interface v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-arithmetic v2.0.0-alpha.8
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking memory-db v0.20.1
[INFO] [stderr]     Checking sp-core v2.0.0-alpha.8
[INFO] [stderr]     Checking libp2p-swarm v0.18.1
[INFO] [stderr]     Checking libp2p v0.18.1
[INFO] [stderr]     Checking substrate-prometheus-endpoint v0.8.0-alpha.8
[INFO] [stderr]     Checking sp-trie v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-inherents v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-rpc v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-state-machine v0.8.0-alpha.8
[INFO] [stderr]     Checking sp-io v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-application-crypto v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-runtime v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-version v2.0.0-alpha.8
[INFO] [stderr]     Checking pallet-contracts-primitives v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-api v2.0.0-alpha.8
[INFO] [stderr]     Checking sp-consensus v0.8.0-alpha.8
[INFO] [stderr]     Checking sp-block-builder v2.0.0-alpha.8
[INFO] [stderr]     Checking pallet-contracts-rpc-runtime-api v0.8.0-alpha.8
[INFO] [stderr]     Checking sp-blockchain v2.0.0-alpha.8
[INFO] [stderr]     Checking pallet-contracts-rpc v0.8.0-alpha.8 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `serde_json`
[INFO] [stderr]    --> src/lib.rs:289:37
[INFO] [stderr]     |
[INFO] [stderr] 289 |             let res: RpcContractExecResult = serde_json::from_str(expected).unwrap();
[INFO] [stderr]     |                                              ^^^^^^^^^^ use of undeclared type or module `serde_json`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `serde_json`
[INFO] [stderr]    --> src/lib.rs:290:17
[INFO] [stderr]     |
[INFO] [stderr] 290 |             let actual = serde_json::to_string(&res).unwrap();
[INFO] [stderr]     |                          ^^^^^^^^^^ use of undeclared type or module `serde_json`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: could not compile `pallet-contracts-rpc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d42cd247f46012a94de896177453e09a1a7679385178fa3c7e24739d516ee2c4"`
[INFO] running `"docker" "rm" "-f" "d42cd247f46012a94de896177453e09a1a7679385178fa3c7e24739d516ee2c4"`
[INFO] [stdout] d42cd247f46012a94de896177453e09a1a7679385178fa3c7e24739d516ee2c4