Unknown exception during compilation: std::bad_cast

[agroce]

Description

This contract:

contract C {
    function f() public returns (uint, uint) {
        try this() {
        } catch Error(string memory) {
        }
    }
}

produces:

Unknown exception during compilation: std::bad_cast

when run with solfuzzer (solc alone seems ok)

On master, using AFL fuzzing. Another discovery using https://github.com/agroce/afl-compiler-fuzzer

Environment

• Compiler version: 0.6.3-develop.2020.2.10+commit.e8eb1f2d.Linux.clang
• Target EVM version (as per compiler settings): N/A
• Framework/IDE (e.g. Truffle or Remix): N/A
• EVM execution environment / backend / blockchain client: N/A
• Operating system: Ubuntu 18.04 in docker

Steps to Reproduce

Save this contract in shrink.sol (or whatever filename)

contract C {
    function f() public returns (uint, uint) {
        try this() {
        } catch Error(string memory) {
        }
    }
}

produces:

> solc shrink.sol
Unknown exception during compilation: std::bad_cast