StatementExtractor: better diagnostics if parent is unexpectedly null

Review: IDEA-CR-21189
2026-09-27 10:03:11 +07:00 · 2017-06-14 10:07:30 +07:00
parent f7f8a7f214
commit 4a79dbe010
1 changed files with 4 additions and 1 deletions
@@ -73,7 +73,10 @@ public class StatementExtractor {
      }
      parent = ObjectUtils.tryCast(parentElement, PsiExpression.class);
      if (parent == null) {
-        throw new RuntimeExceptionWithAttachments("Expected to have expression parent",
+        String message = PsiTreeUtil.isAncestor(root, expression, false) ?
+                         "Expected to have expression parent" :
+                         "Supplied root is not the expression ancestor";
+        throw new RuntimeExceptionWithAttachments(message,
                                                  new Attachment("expression.txt", expression.getText()),
                                                  new Attachment("root.txt", root.getText()));
      }