Merge pull request #535 from tlsfuzzer/more-errors-on-import-mlkem

fail kyber_py import because of SyntaxError too

Author: tomato42

tlslite/utils/compat.py

@@ -244,5 +244,9 @@ def byte_length(val):
     del ML_KEM_1024
 except ImportError:
     ML_KEM_AVAILABLE = False
+except SyntaxError:
+    # trying to import it on older Python versions causes it to abort with
+    # SyntaxError not ImportError
+    ML_KEM_AVAILABLE = False
 else:
     ML_KEM_AVAILABLE = True