diff --git a/html5lib/html5parser.py b/html5lib/html5parser.py
index 74d829d9..f06a1008 100644
--- a/html5lib/html5parser.py
+++ b/html5lib/html5parser.py
@@ -205,45 +205,44 @@ def mainLoop(self):
             prev_token = None
             new_token = token
             while new_token is not None:
-                prev_token = new_token
-                currentNode = self.tree.openElements[-1] if self.tree.openElements else None
-                currentNodeNamespace = currentNode.namespace if currentNode else None
-                currentNodeName = currentNode.name if currentNode else None
-
                 type = new_token["type"]
-
                 if type == ParseErrorToken:
                     self.parseError(new_token["data"], new_token.get("datavars", {}))
-                    new_token = None
-                else:
-                    if (len(self.tree.openElements) == 0 or
-                        currentNodeNamespace == self.tree.defaultNamespace or
-                        (self.isMathMLTextIntegrationPoint(currentNode) and
-                         ((type == StartTagToken and
-                           token["name"] not in frozenset(["mglyph", "malignmark"])) or
-                          type in (CharactersToken, SpaceCharactersToken))) or
-                        (currentNodeNamespace == namespaces["mathml"] and
-                         currentNodeName == "annotation-xml" and
-                         type == StartTagToken and
-                         token["name"] == "svg") or
-                        (self.isHTMLIntegrationPoint(currentNode) and
-                         type in (StartTagToken, CharactersToken, SpaceCharactersToken))):
-                        phase = self.phase
-                    else:
-                        phase = self.phases["inForeignContent"]
-
-                    if type == CharactersToken:
-                        new_token = phase.processCharacters(new_token)
-                    elif type == SpaceCharactersToken:
-                        new_token = phase.processSpaceCharacters(new_token)
-                    elif type == StartTagToken:
-                        new_token = phase.processStartTag(new_token)
-                    elif type == EndTagToken:
-                        new_token = phase.processEndTag(new_token)
-                    elif type == CommentToken:
-                        new_token = phase.processComment(new_token)
-                    elif type == DoctypeToken:
-                        new_token = phase.processDoctype(new_token)
+                    break
+
+                prev_token = new_token
+                currentNode = self.tree.openElements[-1] if self.tree.openElements else None
+
+                in_foreign_content = True
+                if currentNode is None:
+                    in_foreign_content = False
+                elif currentNode.namespace == self.tree.defaultNamespace:
+                    in_foreign_content = False
+                elif self.isHTMLIntegrationPoint(currentNode):
+                    if type in (StartTagToken, CharactersToken, SpaceCharactersToken):
+                        in_foreign_content = False
+                elif self.isMathMLTextIntegrationPoint(currentNode):
+                    if type == StartTagToken and token["name"] not in frozenset(["mglyph", "malignmark"]):
+                        in_foreign_content = False
+                    elif type in (CharactersToken, SpaceCharactersToken):
+                        in_foreign_content = False
+                elif currentNode.namespace == namespaces["mathml"] and currentNode.name == "annotation-xml":
+                    if type == StartTagToken and token["name"] == "svg":
+                        in_foreign_content = False
+
+                phase = self.phases["inForeignContent"] if in_foreign_content else self.phase
+                if type == CharactersToken:
+                    new_token = phase.processCharacters(new_token)
+                elif type == SpaceCharactersToken:
+                    new_token = phase.processSpaceCharacters(new_token)
+                elif type == StartTagToken:
+                    new_token = phase.processStartTag(new_token)
+                elif type == EndTagToken:
+                    new_token = phase.processEndTag(new_token)
+                elif type == CommentToken:
+                    new_token = phase.processComment(new_token)
+                elif type == DoctypeToken:
+                    new_token = phase.processDoctype(new_token)
 
             if (type == StartTagToken and prev_token["selfClosing"] and
                     not prev_token["selfClosingAcknowledged"]):