updated for version 7.3.055
Problem:    Recursively nested lists and dictionaries cause a near-endless
            loop when comparing them with a copy. (ZyX)
Solution:   Limit recursiveness in a way that non-recursive structures can
            still be nested very deep.
Files:      src/eval.c, src/testdir/test55.in, src/testdir/test55.ok
diff --git a/src/testdir/test55.ok b/src/testdir/test55.ok
index da83002..6e40235 100644
--- a/src/testdir/test55.ok
+++ b/src/testdir/test55.ok
@@ -109,3 +109,5 @@
 1
 0
 0
+1
+1