SF patch 763201: handling of SyntaxErrors in symbol table build

Bug fix candidate.

Lib/test/test_symtable.py

@@ -1,8 +1,20 @@
-from test.test_support import verify
+from test.test_support import vereq, TestFailed
 
 import _symtable
 
 symbols = _symtable.symtable("def f(x): return x", "?", "exec")
 
-verify(symbols[0].name == "global")
+vereq(symbols[0].name, "global")
-verify(len([ste for ste in symbols.values() if ste.name == "f"]) == 1)
+vereq(len([ste for ste in symbols.values() if ste.name == "f"]), 1)
+
+# Bug tickler: SyntaxError file name correct whether error raised
+# while parsing or building symbol table.
+def checkfilename(brokencode):
+    try:
+        _symtable.symtable(brokencode, "spam", "exec")
+    except SyntaxError, e:
+        vereq(e.filename, "spam")
+    else:
+        raise TestFailed("no SyntaxError for %r" % (brokencode,))
+checkfilename("def f(x): foo)(")  # parse-time
+checkfilename("def f(x): global x")  # symtable-build-time

Lib/test/test_syntax.py

@@ -1,5 +1,6 @@
 import re
 import unittest
+import warnings
 
 from test import test_support
 
@@ -27,6 +28,20 @@ class SyntaxTestCase(unittest.TestCase):
     def test_assign_del(self):
         self._check_error("del f()", "delete")
 
+    def test_global_err_then_warn(self):
+        # Bug tickler:  The SyntaxError raised for one global statement
+        # shouldn't be clobbered by a SyntaxWarning issued for a later one.
+        source = re.sub('(?m)^ *:', '', """\
+            :def error(a):
+            :    global a  # SyntaxError
+            :def warning():
+            :    b = 1
+            :    global b  # SyntaxWarning
+            :""")
+        warnings.filterwarnings(action='ignore', category=SyntaxWarning)
+        self._check_error(source, "global")
+        warnings.filters.pop(0)
+
 def test_main():
     test_support.run_unittest(SyntaxTestCase)