bugfix: finally blocks were not executed when the except block is exited by raise or return

tests/run/texceptions.nim

@@ -0,0 +1,66 @@
+discard """
+  output: '''
+BEFORE
+FINALLY
+
+BEFORE
+EXCEPT
+FINALLY
+RECOVER
+
+BEFORE
+EXCEPT
+FINALLY
+'''
+"""
+
+echo ""
+
+proc no_expcetion =
+  try:
+    echo "BEFORE"
+
+  except:
+    echo "EXCEPT"
+    raise
+
+  finally:
+    echo "FINALLY"
+
+try: no_expcetion()
+except: echo "RECOVER"
+
+echo ""
+
+proc reraise_in_except =
+  try:
+    echo "BEFORE"
+    raise newException(EIO, "")
+
+  except:
+    echo "EXCEPT"
+    raise
+
+  finally:
+    echo "FINALLY"
+
+try: reraise_in_except()
+except: echo "RECOVER"
+
+echo ""
+
+proc return_in_except =
+  try:
+    echo "BEFORE"
+    raise newException(EIO, "")
+
+  except:
+    echo "EXCEPT"
+    return
+
+  finally:
+    echo "FINALLY"
+
+try: return_in_except()
+except: echo "RECOVER"
+