Check failed for libidn-1.24 with glibc 2.14.1

[Funda Wang]

Hello,

I'm currently build libidn-1.24 with glibc 2.14.1/valgrind 3.7 under
Mageia cauldron. All builds fine, except that `make check' failed
after building. Log here:

PASS: tst_idna
==25261== Invalid read of size 4
==25261==    at 0x4E328E5: idna_to_ascii_4z (idna.c:526)
==25261==    by 0x4E32B74: idna_to_ascii_8z (idna.c:579)
==25261==    by 0x400AB5: doit (tst_idna2.c:485)
==25261==    by 0x40089C: main (utils.c:146)
==25261==  Address 0x53ed8d8 is 8 bytes inside a block of size 10 alloc'd
==25261==    at 0x4C2693D: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==25261==    by 0x4E32A30: idna_to_ascii_4z (idna.c:540)
==25261==    by 0x4E32B74: idna_to_ascii_8z (idna.c:579)
==25261==    by 0x400AB5: doit (tst_idna2.c:485)
==25261==    by 0x40089C: main (utils.c:146)
==25261==
==25261== Invalid read of size 4
==25261==    at 0x4E328D0: idna_to_ascii_4z (idna.c:526)
==25261==    by 0x4E32B74: idna_to_ascii_8z (idna.c:579)
==25261==    by 0x400AB5: doit (tst_idna2.c:485)
==25261==    by 0x40089C: main (utils.c:146)
==25261==  Address 0x53fbae0 is 0 bytes inside a block of size 3 alloc'd
==25261==    at 0x4C2693D: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==25261==    by 0x4E32A30: idna_to_ascii_4z (idna.c:540)
==25261==    by 0x4E32B74: idna_to_ascii_8z (idna.c:579)
==25261==    by 0x400AB5: doit (tst_idna2.c:485)
==25261==    by 0x40089C: main (utils.c:146)
==25261==
FAIL: tst_idna2
PASS: tst_idna3
==25269== Invalid read of size 4
==25269==    at 0x4E328D0: idna_to_ascii_4z (idna.c:526)
==25269==    by 0x4E32B74: idna_to_ascii_8z (idna.c:579)
==25269==    by 0x400931: doit (tst_idna4.c:45)
==25269==    by 0x40076C: main (utils.c:146)
==25269==  Address 0x53ed2d4 is 4 bytes inside a block of size 7 alloc'd
==25269==    at 0x4C2693D: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==25269==    by 0x4E32A30: idna_to_ascii_4z (idna.c:540)
==25269==    by 0x4E32B74: idna_to_ascii_8z (idna.c:579)
==25269==    by 0x400931: doit (tst_idna4.c:45)
==25269==    by 0x40076C: main (utils.c:146)
==25269==
FAIL: tst_idna4

i.e., idna2 and idna4 tests are failed. Is it a bug in libidn or
valgrind? Regards.