method not found error for nested struct argument

[wolflo]

Version

ethers v0.5.1
│ ├── ethers-contract v0.5.1
│ │ ├── ethers-contract-abigen v0.5.1
│ │ │ ├── ethers-core v0.5.1
│ │ ├── ethers-contract-derive v0.5.1 (proc-macro)
│ │ │ ├── ethers-contract-abigen v0.5.1
│ │ │ ├── ethers-core v0.5.1
│ │ ├── ethers-core v0.5.1
│ │ ├── ethers-providers v0.5.1
│ │ │ ├── ethers-core v0.5.1
│ ├── ethers-core v0.5.1
│ ├── ethers-middleware v0.5.1
│ │ ├── ethers-contract v0.5.1
│ │ ├── ethers-core v0.5.1
│ │ ├── ethers-providers v0.5.1
│ │ ├── ethers-signers v0.5.1
│ │ │ ├── ethers-core v0.5.1
│ ├── ethers-providers v0.5.1
│ └── ethers-signers v0.5.1

Description

Relates to #363.

When calling a solidity method using abigen! generated bindings, a method not found (this should never happen): DecodingError(InvalidData) error is thrown.

The method being called accepts a single struct, which itself contains an array of another struct.

struct Inner {
    bytes32 id;
    bytes data;
}
struct Outer {
     Inner[] innerStructs;
}

function useStruct(Outer calldata foo) external;