solidity/test/libsolidity/syntaxTests/literalSuffixes/suffixableLiterals/invalid_suffixed_integer_octal.sol

function suffix(uint value) pure suffix returns (uint) { return value; }

contract C {
    uint x = 01_23_45 suffix;
}
// ----
// ParserError 8936: (100-101): Octal numbers not allowed.