[INFO] fetching crate pallet-contracts-rpc 0.8.0...
[INFO] checking pallet-contracts-rpc-0.8.0 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate pallet-contracts-rpc 0.8.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pallet-contracts-rpc 0.8.0 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pallet-contracts-rpc 0.8.0
[INFO] finished tweaking crates.io crate pallet-contracts-rpc 0.8.0
[INFO] tweaked toml for crates.io crate pallet-contracts-rpc 0.8.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pallet-contracts-rpc-runtime-api v0.8.0
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a5fd7b8a1c8b54890f5762699b9bc4caef7ea865c6b89d06732320ff61e83e0
[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" "3a5fd7b8a1c8b54890f5762699b9bc4caef7ea865c6b89d06732320ff61e83e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a5fd7b8a1c8b54890f5762699b9bc4caef7ea865c6b89d06732320ff61e83e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a5fd7b8a1c8b54890f5762699b9bc4caef7ea865c6b89d06732320ff61e83e0", kill_on_drop: false }`
[INFO] [stdout] 3a5fd7b8a1c8b54890f5762699b9bc4caef7ea865c6b89d06732320ff61e83e0
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6945e965790e4e6ee8b6c3743ddecffffbd09b2f36f927da1db618e99d4311b5
[INFO] running `Command { std: "docker" "start" "-a" "6945e965790e4e6ee8b6c3743ddecffffbd09b2f36f927da1db618e99d4311b5", kill_on_drop: false }`
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[INFO] [stderr]    Compiling libp2p-core v0.22.1
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[INFO] [stderr]     Checking substrate-prometheus-endpoint v0.8.0
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[INFO] [stderr]     Checking sp-runtime v2.0.0
[INFO] [stderr]     Checking sp-version v2.0.0
[INFO] [stderr]     Checking pallet-contracts-primitives v2.0.0
[INFO] [stderr]     Checking sp-api v2.0.0
[INFO] [stderr]     Checking sp-consensus v0.8.0
[INFO] [stderr]     Checking sp-block-builder v2.0.0
[INFO] [stderr]     Checking pallet-contracts-rpc-runtime-api v0.8.0
[INFO] [stderr]     Checking sp-blockchain v2.0.0
[INFO] [stderr]     Checking pallet-contracts-rpc v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]    --> src/lib.rs:300:18
[INFO] [stdout]     |
[INFO] [stdout] 300 |         let req: Req = serde_json::from_str(r#"
[INFO] [stdout]     |                        ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]    --> src/lib.rs:315:37
[INFO] [stdout]     |
[INFO] [stdout] 315 |             let res: RpcContractExecResult = serde_json::from_str(expected).unwrap();
[INFO] [stdout]     |                                              ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]    --> src/lib.rs:316:17
[INFO] [stdout]     |
[INFO] [stdout] 316 |             let actual = serde_json::to_string(&res).unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pallet-contracts-rpc`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6945e965790e4e6ee8b6c3743ddecffffbd09b2f36f927da1db618e99d4311b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6945e965790e4e6ee8b6c3743ddecffffbd09b2f36f927da1db618e99d4311b5", kill_on_drop: false }`
[INFO] [stdout] 6945e965790e4e6ee8b6c3743ddecffffbd09b2f36f927da1db618e99d4311b5