* makes test_trace tests restore the tracefunc after they run
 * write_results() in trace module will not terminate if lnotab
   cannot be found.

Issue #21863: cProfile now displays the module name of C extension functions, in addition to their own name.

tests

file_wrapper object is destroyed. The destructor now closes the file if needed.
The close() method can now be called twice: the second call does nothing.

object is destroyed. The destructor now closes the file if needed. The close()
method can now be called twice: the second call does nothing.

- Use support.captured_stderr() where appropriate
- Removes some "from test.support import xxx" import and uses support.xxx
  instead.

- Use support.captured_stderr() where appropriate
- Removes some "from test.support import xxx" import and uses support.xxx
  instead.

Future, Task and Handle objects are created. Pass the traceback to
call_exception_handler() in the 'source_traceback' key.

The traceback is truncated to hide internal calls in asyncio, show only the
traceback from user code.

Add tests for the new source_traceback, and a test for the 'Future/Task
exception was never retrieved' log.

Handle objects are created. Pass the traceback to call_exception_handler() in
the 'source_traceback' key.

The traceback is truncated to hide internal calls in asyncio, show only the
traceback from user code.

Add tests for the new source_traceback, and a test for the 'Future/Task
exception was never retrieved' log.

the coroutine object was created to the "coroutine ... was never yield from"
log

object was created to the "coroutine ... was never yield from" log

module.

This makes the behavior match that of Parser.  Patch by Vajrasky Kok.

Patch by Martin Vignali, test by Claudiu Popa.

move two functions next to the functions that use them.