test a
a   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
test aa
aa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
test aaa
aaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
test aaaa
aaaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
test abab
abab   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
test abca
abca   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
test abcda
abcda   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_d (recursive-merge.c:34)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:56)
merge-recursive-frames value changed from 1 to 3
test a
a   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
test aa
aa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
test aaa
aaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
test aaaa
aaaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
test abab
abab   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
test abca
abca   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
test abcda
abcda   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_d (recursive-merge.c:34)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:59)
merge-recursive-frames value changed from 3 to 2
test a
a   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
test aa
aa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
test aaa
aaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
test aaaa
aaaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
test abab
abab   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
test abca
abca   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
test abcda
abcda   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_d (recursive-merge.c:34)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:62)
merge-recursive-frames value changed from 2 to 1
test a
a   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
test aa
aa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
test aaa
aaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
test aaaa
aaaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
test abab
abab   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
test abca
abca   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
test abcda
abcda   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_d (recursive-merge.c:34)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:65)
merge-recursive-frames value changed from 1 to 0
test a
a   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)
test aa
aa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)
test aaa
aaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)
test aaaa
aaaa   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)
test abab
abab   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)
test abca
abca   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)
test abcda
abcda   at 0x........: VALGRIND_PRINTF_BACKTRACE (valgrind.h:...)
   by 0x........: stacktrace (recursive-merge.c:17)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: f_d (recursive-merge.c:34)
   by 0x........: f_c (recursive-merge.c:31)
   by 0x........: f_b (recursive-merge.c:28)
   by 0x........: f_a (recursive-merge.c:25)
   by 0x........: doit (recursive-merge.c:43)
   by 0x........: main (recursive-merge.c:68)