Added escaping of vertical bar character in annotation labels (#8610)

1 files changed, 9 insertions, 1 deletions

diff --git a/pylint/pyreverse/dot_printer.py b/pylint/pyreverse/dot_printer.py
index 054814d05..edaea2384 100644
--- a/pylint/pyreverse/dot_printer.py
+++ b/pylint/pyreverse/dot_printer.py
@@ -119,11 +119,19 @@ class DotPrinter(Printer):
             )
             label += rf"{method_name}({', '.join(args)})"
             if func.returns:
-                label += ": " + get_annotation_label(func.returns)
+                annotation_label = get_annotation_label(func.returns)
+                label += ": " + self._escape_annotation_label(annotation_label)
             label += rf"{HTMLLabels.LINEBREAK_LEFT.value}"
         label += "}"
         return label
 
+    def _escape_annotation_label(self, annotation_label: str) -> str:
+        # Escape vertical bar characters to make them appear as a literal characters
+        # otherwise it gets treated as field separator of record-based nodes
+        annotation_label = annotation_label.replace("|", r"\|")
+
+        return annotation_label
+
     def emit_edge(
         self,
         from_node: str,