using indent 2.2.10 I observed that the break-function-decl-args-end
long option was not recognized well.
digging into the source I found that the comment of function "eqin"
says that "true" is returned when the two argument strings are equal,
however, its implementation returns "true" whenever the first argument
is a prefix of the second one, which explains the observed behavior.
suggestion: insert the line
if(*s2) return false;
just before asigning the value to achieve what I guess was intented.
(every pair of options but the two
are prefix-free, which give a hint why the bug has been hidden for years :-).
PS. remember the saying from Norm Schryer:
"If the code and comments disagree, both are probably wrong".