fix a pdb problem when dropping to a "raises" related failure

--HG--
branch : trunk

CHANGELOG

@@ -29,6 +29,8 @@ Changes between 1.2.1 and 1.2.0
 
 - fix issue63: assume <40 columns to be a bogus terminal width, default to 80
 
+- fix pdb debugging to be in the correct frame on raises-related errors 
+
 - update apipkg.py to fix an issue where recursive imports might
   unnecessarily break importing 
 

py/_plugin/pytest_pdb.py

@@ -91,10 +91,11 @@ class Pdb(py.std.pdb.Pdb):
         stack, i = pdb.Pdb.get_stack(self, f, t)
         if f is None:
             i = max(0, len(stack) - 1)
+            while i and stack[i][0].f_locals.get("__tracebackhide__", False):
+                i-=1
         return stack, i
 
 def post_mortem(t):
-    # modified from pdb.py for the new get_stack() implementation
     p = Pdb()
     p.reset()
     p.interaction(None, t)

testing/plugin/test_pytest_pdb.py

@@ -43,3 +43,22 @@ class TestPDB:
         child.expect("1 failed")
         if child.isalive(): 
             child.wait()
+
+    def test_pdb_interaction_exception(self, testdir):
+        p1 = testdir.makepyfile("""
+            import py
+            def globalfunc():
+                pass
+            def test_1():
+                py.test.raises(ValueError, globalfunc)
+        """)
+        child = testdir.spawn_pytest("--pdb %s" % p1)
+        child.expect(".*def test_1")
+        child.expect(".*py.test.raises.*globalfunc")
+        child.expect("(Pdb)")
+        child.sendline("globalfunc")
+        child.expect(".*function")
+        child.sendeof()
+        child.expect("1 failed")
+        if child.isalive(): 
+            child.wait()