Merged revisions 76776 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r76776 | benjamin.peterson | 2009-12-12 19:23:39 -0600 (Sat, 12 Dec 2009) | 25 lines

  Merged revisions 76534,76538,76628,76701,76774 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r76534 | martin.v.loewis | 2009-11-26 02:42:05 -0600 (Thu, 26 Nov 2009) | 2 lines

    Fix typo.
  ........
    r76538 | georg.brandl | 2009-11-26 14:48:25 -0600 (Thu, 26 Nov 2009) | 1 line

    #7400: typo.
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    r76628 | andrew.kuchling | 2009-12-02 08:27:11 -0600 (Wed, 02 Dec 2009) | 1 line

    Markup fixes
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    r76701 | andrew.kuchling | 2009-12-07 20:37:05 -0600 (Mon, 07 Dec 2009) | 1 line

    Typo fix; grammar fix
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    r76774 | benjamin.peterson | 2009-12-12 18:54:15 -0600 (Sat, 12 Dec 2009) | 1 line

    account for PyObject_IsInstance's new ability to fail
  ........
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Doc/library/functions.rst

@@ -965,7 +965,7 @@ are always available.  They are listed here in alphabetical order.
 .. function:: set([iterable])
    :noindex:
 
-   Return a new set, optionally with elements are taken from *iterable*.
+   Return a new set, optionally with elements taken from *iterable*.
    The set type is described in :ref:`types-set`.
 
 

Parser/asdl_c.py

@@ -366,6 +366,7 @@ class Obj2ModVisitor(PickleVisitor):
         self.emit("obj2ast_%s(PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0)
         self.emit("{", 0)
         self.emit("PyObject* tmp = NULL;", 1)
+        self.emit("int isinstance;", 1)
         self.emit("", 0)
 
     def sumTrailer(self, name):
@@ -385,7 +386,13 @@ class Obj2ModVisitor(PickleVisitor):
     def simpleSum(self, sum, name):
         self.funcHeader(name)
         for t in sum.types:
-            self.emit("if (PyObject_IsInstance(obj, (PyObject*)%s_type)) {" % t.name, 1)
+            line = ("isinstance = PyObject_IsInstance(obj, "
+                    "(PyObject *)%s_type);")
+            self.emit(line % (t.name,), 1)
+            self.emit("if (isinstance == -1) {", 1)
+            self.emit("return 1;", 2)
+            self.emit("}", 1)
+            self.emit("if (isinstance) {", 1)
             self.emit("*out = %s;" % t.name, 2)
             self.emit("return 0;", 2)
             self.emit("}", 1)
@@ -407,7 +414,12 @@ class Obj2ModVisitor(PickleVisitor):
         for a in sum.attributes:
             self.visitField(a, name, sum=sum, depth=1)
         for t in sum.types:
-            self.emit("if (PyObject_IsInstance(obj, (PyObject*)%s_type)) {" % t.name, 1)
+            line = "isinstance = PyObject_IsInstance(obj, (PyObject*)%s_type);"
+            self.emit(line % (t.name,), 1)
+            self.emit("if (isinstance == -1) {", 1)
+            self.emit("return 1;", 2)
+            self.emit("}", 1)
+            self.emit("if (isinstance) {", 1)
             for f in t.fields:
                 self.visitFieldDeclaration(f, t.name, sum=sum, depth=2)
             self.emit("", 0)
@@ -1077,11 +1089,15 @@ mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
     PyObject *req_type[] = {(PyObject*)Module_type, (PyObject*)Expression_type,
                             (PyObject*)Interactive_type};
     char *req_name[] = {"Module", "Expression", "Interactive"};
+    int isinstance;
     assert(0 <= mode && mode <= 2);
 
     init_types();
 
-    if (!PyObject_IsInstance(ast, req_type[mode])) {
+    isinstance = PyObject_IsInstance(ast, req_type[mode]);
+    if (isinstance == -1)
+        return NULL;
+    if (!isinstance) {
         PyErr_Format(PyExc_TypeError, "expected %s node, got %.400s",
                      req_name[mode], Py_TYPE(ast)->tp_name);
         return NULL;

Python/bltinmodule.c

@@ -529,6 +529,7 @@ builtin_compile(PyObject *self, PyObject *args, PyObject *kwds)
 	int mode = -1;
 	int dont_inherit = 0;
 	int supplied_flags = 0;
+	int is_ast;
 	PyCompilerFlags cf;
 	PyObject *cmd;
 	static char *kwlist[] = {"source", "filename", "mode", "flags",
@@ -567,7 +568,10 @@ builtin_compile(PyObject *self, PyObject *args, PyObject *kwds)
 		return NULL;
 	}
 
-	if (PyAST_Check(cmd)) {
+	is_ast = PyAST_Check(cmd);
+	if (is_ast == -1)
+		return NULL;
+	if (is_ast) {
 		PyObject *result;
 		if (supplied_flags & PyCF_ONLY_AST) {
 			Py_INCREF(cmd);