Compilation errors when using multiple pragmas and solc >= 0.7.4

[thegostep]

[cgewecke]

@thegostep

Are you using the latest solidity-coverage version? (0.7.14)

Can you show the relevant solidity files?

[thegostep]

as far as I can tell, it is related to using pragma abicoder v2; in solo 0.7

[thegostep]

Example file:

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
pragma abicoder v2;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {IGeyser} from "../Geyser.sol";
import {IFactory} from "../Factory/IFactory.sol";
import {IUniversalVault} from "../UniversalVault.sol";

contract MockStakeHelper {
    function flashStake(
        address geyser,
        address vault,
        address recipient,
        uint256 amount,
        bytes calldata lockPermission,
        bytes calldata unstakePermission
    ) external {
        IGeyser(geyser).stake(vault, amount, lockPermission);
        IGeyser(geyser).unstakeAndClaim(vault, recipient, amount, unstakePermission);
    }

    function stakeBatch(
        address[] calldata geysers,
        address[] calldata vaults,
        uint256[] calldata amounts,
        bytes[] calldata permissions
    ) external {
        for (uint256 index = 0; index < vaults.length; index++) {
            IGeyser(geysers[index]).stake(vaults[index], amounts[index], permissions[index]);
        }
    }
}

[thegostep]

Are you using the latest solidity-coverage version? (0.7.14)

yessir

[cgewecke]

Ah it might be a bug introduced in that version - some logic was added to support file level function definitions and it might not handle multiple pragmas correctly.

Could you see if downgrading to 0.7.13 fixes?

[thegostep]

Could you see if downgrading to 0.7.13 fixes?

Indeed - downgrading fixed it!

[cgewecke]

Ok sweet - thanks for reporting.

[giosdas]

Hello
To help people to found this issue and save time I report here the full stacktrace in text format:

CompileError: /home/user/Projects/smart-contracts/.coverage_contracts/TokenContract.sol:3:1: DeclarationError: Function with same name and parameter types defined twice.
function c_0x56fb40c0(bytes32 c__0x56fb40c0) pure {}
^--------------------------------------------------^
/home/user/Projects/smart-contracts/.coverage_contracts/TokenContract.sol:6:1: Other declaration is here:
function c_0x56fb40c0(bytes32 c__0x56fb40c0) pure {}
^--------------------------------------------------^

Compilation failed. See above.
	at run (/home/user/Projects/smart-contracts/node_modules/truffle/build/webpack:/packages/compile-solidity/run.js:53:1)
	at Object.sourcesWithDependencies (/home/user/Projects/smart-contracts/node_modules/truffle/build/webpack:/packages/compile-solidity/index.js:121:58)
	at all (/home/user/Projects/smart-contracts/node_modules/truffle/build/webpack:/packages/compile-solidity/index.js:61:1)
	at /home/user/Projects/smart-contracts/node_modules/truffle/build/webpack:/packages/workflow-compile/legacy/index.js:98:31
	at async Promise.all (index 0)
	at Object.compile (/home/user/Projects/smart-contracts/node_modules/truffle/build/webpack:/packages/workflow-compile/legacy/index.js:50:1)
	at plugin (/home/user/Projects/smart-contracts/node_modules/solidity-coverage/plugins/truffle.plugin.js:97:5)

Regards

[cgewecke]

@giosdas Thanks for pinging. Just patched this in 0.7.15. Please lmk if you're still seeing issues after upgrading