[BUG] RuntimeError: Internal error

[Furetur]

• I have reviewed this project's contribution guidelines

Describe the bug
Got this error while fuzzing with Hypothesis

Input file:

A A@

Stacktrace

tmp/41PJSO2KRV.rdl:1:4: error: mismatched input '<EOF>' expecting {'{', '(', ''', 'boolean', 'bit', 'longint', 'true', 'false', 'na', 'rw', 'wr', 'r', 'w', 'rw1', 'w1', 'rclr', 'rset', 'ruser', 'woset', 'woclr', 'wot', 'wzs', 'wzc', 'wzt', 'wclr', 'wset', 'wuser', 'compact', 'regalign', 'fullalign', 'hw', 'sw', INT, HEX_INT, VLOG_INT, STRING, '+', '-', '!', '~', '~&', '&', '|', '~|', '^', XNOR, ID}
A A@
   ^
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File ".../rdl/check_rdl_result.py", line 7, in main
    compile_one_file(file)
  File ".../rdl/check.py", line 22, in compile_one_file
    rdlc.compile_file(str(file))
  File ".../python3.11/site-packages/systemrdl/compiler.py", line 272, in compile_file
    parsed_tree = sa_systemrdl.parse(
                  ^^^^^^^^^^^^^^^^^^^
  File ".../python3.11/site-packages/systemrdl/parser/sa_systemrdl.py", line 81, in parse
    return _cpp_parse(stream, entry_rule_name, sa_err_listener)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../python3.11/site-packages/systemrdl/parser/sa_systemrdl.py", line 104, in _cpp_parse
    return sa_systemrdl_cpp_parser.do_parse(SystemRDLParser, stream, entry_rule_name, sa_err_listener)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: Internal error

Additional context

If you are interested, this is the fuzzing code that found the bug

import random
import string
from pathlib import Path


from systemrdl import RDLCompiler, RDLCompileError
from hypothesis import given
import hypothesis.strategies as st

def write_file(text: str) -> Path:
    N = 10
    postfix = "".join(random.choices(string.ascii_uppercase + string.digits, k=N))
    path = Path(f"tmp/{postfix}.rdl")
    path.write_text(text)
    return path


def compile_one_file(file: Path):
    rdlc = RDLCompiler()
    try:
        rdlc.compile_file(str(file))
        rdlc.elaborate()
    except RDLCompileError as e:
        print(f"Compilation error: {e}")


def check_compile(text: str):
    Path("tmp").mkdir(exist_ok=True)
    file = write_file(text)
    compile_one_file(file)
    file.unlink() # The file will not be deleted if the previous line raises Exception

@given(st.text())
def test_rdl_compiler_with_text(text: str):
    check_compile(text)

[amykyta3]

Thanks.
Fix will be published in next release.