Fix fastobo.iter not forwarding SyntaxError when given a file handle

Author: althonos

src/py/mod.rs

@@ -125,6 +125,9 @@ pub fn init(py: Python, m: &PyModule) -> PyResult<()> {
         } else {
             match FrameReader::from_handle(fh, ordered, threads) {
                 Ok(r) => Ok(r),
+                Err(inner) if inner.is_instance::<pyo3::exceptions::PySyntaxError>(py) => {
+                    Err(inner)
+                }
                 Err(inner) => {
                     raise!(py, PyTypeError("expected path or binary file handle") from inner);
                 }

tests/test_fastobo.py

@@ -1,5 +1,6 @@
 # coding: utf-8
 
+import io
 import os
 import unittest
 
@@ -74,6 +75,10 @@ def test_type_error(self):
         with open(MS) as f:
             self.assertRaises(TypeError, fastobo.iter, f)
 
+    def test_syntax_error(self):
+        f = io.BytesIO(b"format-version: 1.4\ndate: 05:20:2021 12:00\n")
+        self.assertRaises(SyntaxError, fastobo.iter, f)
+
     def test_threading_single(self):
         frame_count = sum(1 for _ in fastobo.iter(MS, threads=1))
         self.assertEqual(frame_count, MS_FRAMES)