Remix Solidity Smart Contract Stuck On Compiling State

Question

The 1inch Smart Contract is unable to compile in Remix as it appears to be stuck in the Solidity compiling phase.

Expected

1. Create a new 1inch_38211317.sol smart contract file in Remix.
2. Compile the contract.
3. Deploy and run the contract on the Ropsten Test Network.

Observed

1. The 1inch Smart Contract code is copied into a new 1inch_Test.sol file.
2. The default compiler version throws an error.

browswer/1inch_38211317.sol:782:1: ParseError: Source file requires different compiler version (current compiler is 0.7.4+commit.3f05b770.Emscripten.clang) - note that nightly builds are considered to be strictly less than the released version pragma solidity ^0.6.0

3. Change the compiler to the latest local version - 0.7.4

4. The Compile 1inch_38211317.sol button is stuck in the compiling/loading state.

Answer 1

Bit of an awkward one.

0.7.4 is too high, given some of the contracts^† are ^0.6.0 (and the ^ prevents using 0.7.x.)

But you'll need at least 0.6.5 due to the use of the immutable keyword in one of the contracts.

So really your choices are >=0.6.5 but < 0.7.0. (I've checked they work.)

( ^† The important point here being that there are multiple contracts in the that one file.)