CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

contract TryCatchNewContract {

    string public hello;

    function tryDeployingContract() public {

        try new Target() returns (Target newContract) {

CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

contract TryCatchExamples {

    function tryCatchExternalCall(address target) public {

        try Target(target).doSomething() returns (string memory) {

        } catch {

CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

contract UnimplementedFeatureError {

    struct Vote {
        uint256 optionId;
        string value;
    }

CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

contract DeployedContract {
    uint public result = 0;

    function add(uint256 input) public {
        result = result + input;
    }
}

CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

contract Warnings {

    // all the lines below will return a warning
    // ---
    // Warning: This declaration shadows a builtin symbol.

    string gasleft;

CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;


// We are missing to put the `requested` parameter name next to the `@param` tag.
// ---
// DocstringParsingError: Documented parameter "an" not found in the parameter list of the function.

/**
 * @dev error when trying to transfer more `requested` amount than `available

CJ42

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

contract PanicErrorExample {

    function countTrailingZeroBytes(bytes32 data) public pure returns (uint256) {
        uint256 index = 31;

        // CHECK each bytes of the key, starting from the end (right to left)
        // skip each empty bytes `0x00` to find the first non-empty byte

CJ42

Compiler Error	Description
Warning	Warnings around potential bugs or security that can occur in the contract
ParserError	Solidity code does not conform to the Solidity language rule
DocstringParsingError	Cannot parse Natspec comments or Natspec blocks
SyntaxError	Invalid Solidity syntax, such as using built-in keywords in the wrong lace
DeclarationError	Cannot resolve to a variable, function or built-in symbol
TypeError	Invalid types when assigning values to variables or variables to function or return parameters
UnimplementedFeatureError	Occurs when using a syntax that is not yet supported by the Solidity compiler but planned to be in the future

CJ42

error type	error signature	bytes4 error selector
String Error	Error(string)	0x08c379a0
Panic	Panic(uint256)	0x4e487b71
Custom Errors	custom, based on the custom error definition	based on the custom error name + its parameter types (if any)
Invalid	none	none

CJ42

Error Code (as uint256 hex number)	Description
0x00	Used for generic compiler inserted panics.
0x01	If you call assert with an argument that evaluates to false.
0x11	If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
0x12	If you divide or modulo by zero (e.g. 5 / 0 or 23 % 0)
0x21	If you convert a value that is too big or negative into an enum type.
0x22	If you access a storage byte array that is incorrectly encoded.
0x31	If you call .pop() on an empty array.
0x32	If you access an array, bytesN or an array slice at an out-of-bounds or negative index (i.e. x[i] where i >= x.length or i < 0).