Solang treats unimplemented syntax as unreachable code leading to a crash

[lum7na]

When including selfdestruct IR, solang does not generate a "not implemented" error, but instead produces other errors. It seems to treat the "not implemented" case as an "entered unreachable code".

solang compile a.sol --target solana

contract Test {
  function test(int a, uint b, uint c) public returns(int) {
    if (c < 45) {
      b = 1;
    } else if (c >= 45 && c < 64) {
      b = 1;
    } else if (c >= 64 && c < 85) {
      assembly  {
        {
          selfdestruct(true)
        }
      }
      b = 1;
    }
    return 0;
  }
}

thread 'main' panicked at src/emit/expression.rs:2415:14:
internal error: entered unreachable code
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace