[INFO] fetching crate ethabi-fork-ethcontract 13.0.0...
[INFO] checking ethabi-fork-ethcontract-13.0.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate ethabi-fork-ethcontract 13.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate ethabi-fork-ethcontract 13.0.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ethabi-fork-ethcontract 13.0.0
[INFO] finished tweaking crates.io crate ethabi-fork-ethcontract 13.0.0
[INFO] tweaked toml for crates.io crate ethabi-fork-ethcontract 13.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 55 packages
[INFO] [stderr]       Adding arrayvec v0.5.2 (latest: v0.7.4)
[INFO] [stderr]       Adding bitvec v0.17.4 (latest: v1.0.1)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.2.1 (latest: v0.3.3)
[INFO] [stderr]       Adding byte-slice-cast v0.3.5 (latest: v1.2.2)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding ethbloom v0.10.0 (latest: v0.13.0)
[INFO] [stderr]       Adding ethereum-types v0.10.0 (latest: v0.14.1)
[INFO] [stderr]       Adding fixed-hash v0.7.0 (latest: v0.8.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding hex-literal v0.3.4 (latest: v0.4.1)
[INFO] [stderr]       Adding impl-codec v0.4.2 (latest: v0.6.0)
[INFO] [stderr]       Adding impl-serde v0.3.2 (latest: v0.4.0)
[INFO] [stderr]       Adding parity-scale-codec v1.3.7 (latest: v3.6.9)
[INFO] [stderr]       Adding primitive-types v0.8.0 (latest: v0.12.2)
[INFO] [stderr]       Adding radium v0.3.0 (latest: v1.1.0)
[INFO] [stderr]       Adding sha3 v0.9.1 (latest: v0.10.8)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded primitive-types v0.8.0
[INFO] [stderr]   Downloaded bitvec v0.17.4
[INFO] [stderr]   Downloaded ethbloom v0.10.0
[INFO] [stderr]   Downloaded fixed-hash v0.7.0
[INFO] [stderr]   Downloaded radium v0.3.0
[INFO] [stderr]   Downloaded byte-slice-cast v0.3.5
[INFO] [stderr]   Downloaded parity-scale-codec v1.3.7
[INFO] [stderr]   Downloaded impl-codec v0.4.2
[INFO] [stderr]   Downloaded impl-serde v0.3.2
[INFO] [stderr]   Downloaded ethereum-types v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ed320778936a8aa5c2b851e76cac79060ab8a26882ed73c4285acb8c0d5ddce
[INFO] running `Command { std: "docker" "start" "-a" "5ed320778936a8aa5c2b851e76cac79060ab8a26882ed73c4285acb8c0d5ddce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ed320778936a8aa5c2b851e76cac79060ab8a26882ed73c4285acb8c0d5ddce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ed320778936a8aa5c2b851e76cac79060ab8a26882ed73c4285acb8c0d5ddce", kill_on_drop: false }`
[INFO] [stdout] 5ed320778936a8aa5c2b851e76cac79060ab8a26882ed73c4285acb8c0d5ddce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ecdb950e504dd08eea29a25ffb3b0f725107c6fcd9f02b06e9b669e522613389
[INFO] running `Command { std: "docker" "start" "-a" "ecdb950e504dd08eea29a25ffb3b0f725107c6fcd9f02b06e9b669e522613389", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking impl-serde v0.3.2
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]     Checking rlp v0.5.2
[INFO] [stderr]     Checking impl-rlp v0.3.0
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]     Checking ethbloom v0.10.0
[INFO] [stderr]     Checking parity-scale-codec v1.3.7
[INFO] [stderr]     Checking impl-codec v0.4.2
[INFO] [stderr]     Checking primitive-types v0.8.0
[INFO] [stderr]     Checking ethereum-types v0.10.0
[INFO] [stderr]     Checking ethabi-fork-ethcontract v13.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]   --> src/function.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::string::ToString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToString` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]   --> src/function.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::string::ToString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToString` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/operation.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `function::Function::constant`: The constant attribute was removed in Solidity 0.5.0 and has been replaced with stateMutability. If parsing a JSON AST created with this version or later this value will always be false, which may be wrong.
[INFO] [stdout]    --> src/function.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 |             constant: false,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `function::Function::constant`: The constant attribute was removed in Solidity 0.5.0 and has been replaced with stateMutability. If parsing a JSON AST created with this version or later this value will always be false, which may be wrong.
[INFO] [stdout]   --> src/operation.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 constant: false,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.91s
[INFO] running `Command { std: "docker" "inspect" "ecdb950e504dd08eea29a25ffb3b0f725107c6fcd9f02b06e9b669e522613389", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecdb950e504dd08eea29a25ffb3b0f725107c6fcd9f02b06e9b669e522613389", kill_on_drop: false }`
[INFO] [stdout] ecdb950e504dd08eea29a25ffb3b0f725107c6fcd9f02b06e9b669e522613389
[INFO] checking ethabi-fork-ethcontract-13.0.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate ethabi-fork-ethcontract 13.0.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate ethabi-fork-ethcontract 13.0.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ethabi-fork-ethcontract 13.0.0
[INFO] finished tweaking crates.io crate ethabi-fork-ethcontract 13.0.0
[INFO] tweaked toml for crates.io crate ethabi-fork-ethcontract 13.0.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 55 packages
[INFO] [stderr]       Adding arrayvec v0.5.2 (latest: v0.7.4)
[INFO] [stderr]       Adding bitvec v0.17.4 (latest: v1.0.1)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.2.1 (latest: v0.3.3)
[INFO] [stderr]       Adding byte-slice-cast v0.3.5 (latest: v1.2.2)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding ethbloom v0.10.0 (latest: v0.13.0)
[INFO] [stderr]       Adding ethereum-types v0.10.0 (latest: v0.14.1)
[INFO] [stderr]       Adding fixed-hash v0.7.0 (latest: v0.8.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding hex-literal v0.3.4 (latest: v0.4.1)
[INFO] [stderr]       Adding impl-codec v0.4.2 (latest: v0.6.0)
[INFO] [stderr]       Adding impl-serde v0.3.2 (latest: v0.4.0)
[INFO] [stderr]       Adding parity-scale-codec v1.3.7 (latest: v3.6.9)
[INFO] [stderr]       Adding primitive-types v0.8.0 (latest: v0.12.2)
[INFO] [stderr]       Adding radium v0.3.0 (latest: v1.1.0)
[INFO] [stderr]       Adding sha3 v0.9.1 (latest: v0.10.8)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de6a93984bb8fb489f4c3cf39e1ced6b9e7793c55795e4beb915a38ae8699dad
[INFO] running `Command { std: "docker" "start" "-a" "de6a93984bb8fb489f4c3cf39e1ced6b9e7793c55795e4beb915a38ae8699dad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de6a93984bb8fb489f4c3cf39e1ced6b9e7793c55795e4beb915a38ae8699dad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de6a93984bb8fb489f4c3cf39e1ced6b9e7793c55795e4beb915a38ae8699dad", kill_on_drop: false }`
[INFO] [stdout] de6a93984bb8fb489f4c3cf39e1ced6b9e7793c55795e4beb915a38ae8699dad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f68afccd578b09bca6ee83104f1474df6ea2bf7b22929d6615c9318dba9e26db
[INFO] running `Command { std: "docker" "start" "-a" "f68afccd578b09bca6ee83104f1474df6ea2bf7b22929d6615c9318dba9e26db", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking radium v0.3.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking impl-serde v0.3.2
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking bitvec v0.17.4
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]     Checking rlp v0.5.2
[INFO] [stderr]     Checking impl-rlp v0.3.0
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]     Checking ethbloom v0.10.0
[INFO] [stderr]     Checking parity-scale-codec v1.3.7
[INFO] [stderr]     Checking impl-codec v0.4.2
[INFO] [stderr]     Checking primitive-types v0.8.0
[INFO] [stderr]     Checking ethereum-types v0.10.0
[INFO] [stderr]     Checking ethabi-fork-ethcontract v13.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]   --> src/function.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::string::ToString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToString` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]   --> src/function.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::string::ToString;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToString` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/operation.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `function::Function::constant`: The constant attribute was removed in Solidity 0.5.0 and has been replaced with stateMutability. If parsing a JSON AST created with this version or later this value will always be false, which may be wrong.
[INFO] [stdout]    --> src/function.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 |             constant: false,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `function::Function::constant`: The constant attribute was removed in Solidity 0.5.0 and has been replaced with stateMutability. If parsing a JSON AST created with this version or later this value will always be false, which may be wrong.
[INFO] [stdout]   --> src/operation.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 constant: false,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.10s
[INFO] running `Command { std: "docker" "inspect" "f68afccd578b09bca6ee83104f1474df6ea2bf7b22929d6615c9318dba9e26db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f68afccd578b09bca6ee83104f1474df6ea2bf7b22929d6615c9318dba9e26db", kill_on_drop: false }`
[INFO] [stdout] f68afccd578b09bca6ee83104f1474df6ea2bf7b22929d6615c9318dba9e26db