[Bug c++/86898] New: [9 regression] g++.old-deja/g++.mike/p784.C FAILs

["ro at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86898

            Bug ID: 86898
           Summary: [9 regression] g++.old-deja/g++.mike/p784.C FAILs
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---

Between 20180807 (r263360) and 20180808 (r263409), g++.old-deja/g++.mike/p784.C
started to FAIL

+FAIL: g++.old-deja/g++.mike/p784.C  -std=gnu++11 (test for excess errors)
+FAIL: g++.old-deja/g++.mike/p784.C  -std=gnu++14 (test for excess errors)
+FAIL: g++.old-deja/g++.mike/p784.C  -std=gnu++98 (test for excess errors)

I'm seeing it on 32-bit Solaris/SPARC and x86 only, but gcc-testresults lists
many others.

Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.old-deja/g++.mike/p784.C:1185:21:
error: friend declaration of 'String common_prefix(const String&, const
String&, int)' specifies default arguments and isn't a definition
[-fpermissive]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.old-deja/g++.mike/p784.C:1187:21:
error: friend declaration of 'String common_suffix(const String&, const
String&, int)' specifies default arguments and isn't a definition
[-fpermissive]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.old-deja/g++.mike/p784.C:1226:21:
error: friend declaration of 'int readline(istream&, String&, char, int)'
specifies default arguments and isn't a definition [-fpermissive]