Possible bug: 2.2.11 not idempotent

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At work, I have to use a Linux machine whose indent(1) manpage says, in
part,

BUGS
       Please report any bugs to address@hidden

       When  indent  is  run twice on a file, with the same profile, it should
       never change that file the second time.  With  the  current  design  of
       indent,  this  can  not  be guaranteed, and it has not been extensively
       tested.

The second paragraph seems to indicate that non-idempotency is
considered a bug; in case you people consider it enough of a bug to be
worth tracking down, I have a test case which misbehaves for me (with
the OS's indent(1); "indent --version" reports "GNU indent 2.2.11").
If it still misbehaves with your current version, it might be useful as
a test case.

Command line: indent -npro -kr -i8 -ts8 -sob -l80 -ss -ncs -cp1 -il0

There are two input files below, each one base64ed; the above command
transforms each into the other.  (That is, cascaded runs alternate
between the two.)

File 1 (base64ed):
dm9pZCBmb28oc3RydWN0IHRoaW5nICpub2RlLCBzdHJ1Y3Qgb3RoZXJodGluZyAq
aW5zaWRlKQp7CglpZiAobm9kZS0+bWVtYmVyMSAhPSBOVUxMKSB7CgkJaWYgKHN0
cm5jbXAobm9kZS0+bWVtYmVyMiwgInd4eXoiLCA0KSA9PSAwKSB7CgkJCXh5eigi
MTIzNDU2Nzg5YWIgKiVzOyAvKiglbGQpJXMqL1xuIiwKCQkJICAgIG5vZGUtPmFi
Y2RlZiwKCQkJICAgIG5vZGUtPmFiY2RlZmdoaWogPyBzdHJsZW4obm9kZS0+YWJj
ZGVmZ2hpaikgOiAwLAoJCQkgICAgbm9kZS0+CgkJCSAgICBhYmNkZWZnaGlqID8g
KGNoYXIgKilub2RlLT5hYmNkZWZnaGlqIDogIm51bGwiKTsKCQl9Cgl9Cn0K

File 2 (base64ed):
dm9pZCBmb28oc3RydWN0IHRoaW5nICpub2RlLCBzdHJ1Y3Qgb3RoZXJodGluZyAq
aW5zaWRlKQp7CglpZiAobm9kZS0+bWVtYmVyMSAhPSBOVUxMKSB7CgkJaWYgKHN0
cm5jbXAobm9kZS0+bWVtYmVyMiwgInd4eXoiLCA0KSA9PSAwKSB7CgkJCXh5eigi
MTIzNDU2Nzg5YWIgKiVzOyAvKiglbGQpJXMqL1xuIiwKCQkJICAgIG5vZGUtPmFi
Y2RlZiwKCQkJICAgIG5vZGUtPmFiY2RlZmdoaWogPyBzdHJsZW4obm9kZS0+YWJj
ZGVmZ2hpaikgOiAwLAoJCQkgICAgbm9kZS0+YWJjZGVmZ2hpaiA/IChjaGFyICop
bm9kZS0+CgkJCSAgICBhYmNkZWZnaGlqIDogIm51bGwiKTsKCQl9Cgl9Cn0K

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