Catch GeneratorExit exception. Fixes #231.

gns3server/modules/base_manager.py

@@ -115,7 +115,7 @@ class BaseManager:
             for future in done:
                 try:
                     future.result()
-                except Exception as e:
+                except (Exception, GeneratorExit) as e:
                     log.error("Could not close VM {}".format(e), exc_info=1)
                     continue
 

gns3server/modules/dynamips/__init__.py

@@ -130,7 +130,7 @@ class Dynamips(BaseManager):
             for future in done:
                 try:
                     future.result()
-                except Exception as e:
+                except (Exception, GeneratorExit) as e:
                     log.error("Could not stop device hypervisor {}".format(e), exc_info=1)
                     continue
 
@@ -154,7 +154,7 @@ class Dynamips(BaseManager):
             for future in done:
                 try:
                     future.result()
-                except Exception as e:
+                except (Exception, GeneratorExit) as e:
                     log.error("Could not delete device {}".format(e), exc_info=1)
 
     @asyncio.coroutine

gns3server/modules/project.py

@@ -367,7 +367,7 @@ class Project:
             for future in done:
                 try:
                     future.result()
-                except Exception as e:
+                except (Exception, GeneratorExit) as e:
                     log.error("Could not close VM or device {}".format(e), exc_info=1)
 
         if cleanup and os.path.exists(self.path):