autotest: error: m4_divert_pop(TEST_SCRIPT): diversion mismatch

[Braden McDaniel]

I'm seeing an error processing a testsuite.at that was working at some
point; that point was probably a few autoconf releases ago.  But I don't
see anything wrong with what I'm doing and I don't understand the error
message:

        autom4te --language=autotest -I ../../tests ../../tests/testsuite.at -o 
../../tests/testsuite.tmp; mv ../../tests/testsuite.tmp ../../tests/testsuite
        ../../tests/testsuite.at:9: error: m4_divert_pop(TEST_SCRIPT): 
diversion mismatch: 
        ../../tests/testsuite.at:6: m4_divert_push: GROW
        ../../tests/testsuite.at:5: m4_divert_push: TEST_SCRIPT
        ../../tests/testsuite.at:5: m4_divert_push: TEST_GROUPS
        ../../tests/testsuite.at:1: m4_divert_push: KILL
        ../../lib/m4sugar/m4sh.m4:794: AS_ECHO is expanded from...
        ../../tests/testsuite.at:9: the top level
        autom4te: /usr/bin/m4 failed with exit status: 1

The first nine lines of my testsuite.at are:

        AT_INIT
        
        AT_BANNER([Test URI parser])
        
        AT_SETUP([Get the scheme])
        AT_CHECK([parse-uri --scheme 
http://address@hidden:80/foo/bar?attr=val#frag],
                 [0], [http
        ])
        AT_CLEANUP

What causes this? And how do I fix it?

-- 
Braden McDaniel <address@hidden>