ICE for calldata parameter in an internal function

[alex1448]

Description

The following code triggers the ICE shown bellow in the latest solc version 0.8.30. The problem seems to appear with version 0.6.9 (tested on remix), which is when calldata location was permitted for internal functions.

Steps to Reproduce

testcase.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.8.30;

contract C {
    function f(S[10] calldata p) internal {
    }
}

struct S {
    function () internal pure m1;
}

solc testcase.sol

Internal compiler error:
/solidity/libsolidity/ast/Types.cpp(2295): Throw in function virtual bool solidity::frontend::StructType::isDynamicallyEncoded() const
Dynamic exception type: boost::wrapexcept<solidity::langutil::InternalCompilerError>
std::exception::what: Solidity assertion failed
[solidity::util::tag_comment*] = Solidity assertion failed

Environment

• Compiler version: 0.8.30