Debugger: do not stop on exceptions thrown inside pydev-debugger with on raise setting set (PY-15502)

Ignore some inner exceptions while importing in Python 3 and with import hooks.

python/helpers/pydev/pydevd_frame_utils.py

@@ -1,3 +1,5 @@
+from pydevd_constants import IS_PY3K
+
 class Frame(object):
     def __init__(
             self,
@@ -27,12 +29,25 @@ class FCode(object):
 def add_exception_to_frame(frame, exception_info):
     frame.f_locals['__exception__'] = exception_info
 
+FILES_WITH_IMPORT_HOOKS = ['pydev_monkey_qt.py', 'pydev_import_hook.py']
 
 def just_raised(trace):
     if trace is None:
         return False
-    return trace.tb_next is None
-
+    if trace.tb_next is None:
+        if IS_PY3K:
+            if trace.tb_frame.f_code.co_filename != '<frozen importlib._bootstrap>':
+                # Do not stop on inner exceptions in py3 while importing
+                return True
+        else:
+            return True
+    if trace.tb_next is not None:
+        filename = trace.tb_next.tb_frame.f_code.co_filename
+        # ImportError should appear in a user's code, not inside debugger
+        for file in FILES_WITH_IMPORT_HOOKS:
+            if filename.endswith(file):
+                return True
+    return False
 
 def cached_call(obj, func, *args):
     cached_name = '_cached_' + func.__name__