1 files changed, 35 insertions, 0 deletions
diff --git a/test/racc/assets/error_recovery.y b/test/racc/assets/error_recovery.y
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index 0000000000..1fd21ac7d0
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+++ b/test/racc/assets/error_recovery.y
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+# Regression test case for the bug discussed here:
+# https://github.com/whitequark/parser/issues/93
+# In short, a Racc-generated parser could go into an infinite loop when
+# attempting error recovery at EOF
+
+class InfiniteLoop
+
+rule
+
+  stmts: stmt
+       | error stmt
+
+  stmt: '%' stmt
+
+end
+
+---- inner
+
+  def parse
+    @errors = []
+    do_parse
+  end
+
+  def next_token
+    nil
+  end
+
+  def on_error(error_token, error_value, value_stack)
+    # oh my, an error
+    @errors << [error_token, error_value]
+  end
+
+---- footer
+
+InfiniteLoop.new.parse
+\ No newline at end of file