cpython: f90e7540dcba (original) (raw)

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changeset 84869:f90e7540dcba

merge 3.3 (#18565) [#18565]

Benjamin Peterson benjamin@python.org
date	Sat, 27 Jul 2013 14:07:19 -0700
parents	852e824c7093(current diff)516303f32bad(diff)
children	66a3dc613627
files
diffstat	1 files changed, 40 insertions(+), 1 deletions(-)[+] [-] Lib/test/test_pep380.py 41

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line diff

--- a/Lib/test/test_pep380.py +++ b/Lib/test/test_pep380.py @@ -13,7 +13,7 @@ import sys import inspect import parser -from test.support import captured_stderr +from test.support import captured_stderr, disable_gc, gc_collect class TestPEP380Operation(unittest.TestCase): """ @@ -954,6 +954,45 @@ class TestPEP380Operation(unittest.TestC list(gen()) self.assertEqual(ret, 42)

def test_close_with_cleared_frame(self):
```
   # See issue #17669.[](#l1.17)
```
```
   #[](#l1.18)
```

   # Create a stack of generators: outer() delegating to inner()[](#l1.19)

   # delegating to innermost(). The key point is that the instance of[](#l1.20)

   # inner is created first: this ensures that its frame appears before[](#l1.21)

   # the instance of outer in the GC linked list.[](#l1.22)

```
   #[](#l1.23)
```
```
   # At the gc.collect call:[](#l1.24)
```

   #   - frame_clear is called on the inner_gen frame.[](#l1.25)

   #   - gen_dealloc is called on the outer_gen generator (the only[](#l1.26)

   #     reference is in the frame's locals).[](#l1.27)

   #   - gen_close is called on the outer_gen generator.[](#l1.28)

   #   - gen_close_iter is called to close the inner_gen generator, which[](#l1.29)

   #     in turn calls gen_close, and gen_yf.[](#l1.30)

```
   #[](#l1.31)
```

   # Previously, gen_yf would crash since inner_gen's frame had been[](#l1.32)

   # cleared (and in particular f_stacktop was NULL).[](#l1.33)

```
   def innermost():[](#l1.35)
```
```
       yield[](#l1.36)
```
```
   def inner():[](#l1.37)
```
```
       outer_gen = yield[](#l1.38)
```
```
       yield from innermost()[](#l1.39)
```
```
   def outer():[](#l1.40)
```
```
       inner_gen = yield[](#l1.41)
```
```
       yield from inner_gen[](#l1.42)
```

```
   with disable_gc():[](#l1.44)
```
```
       inner_gen = inner()[](#l1.45)
```
```
       outer_gen = outer()[](#l1.46)
```
```
       outer_gen.send(None)[](#l1.47)
```

       outer_gen.send(inner_gen)[](#l1.48)

       outer_gen.send(outer_gen)[](#l1.49)

```
       del outer_gen[](#l1.51)
```
```
       del inner_gen[](#l1.52)
```
```
       gc_collect()[](#l1.53)
```

+ def test_main(): from test import support