Use of uninitialised value of size 8
   at 0x........: test_vstrs_char (vstrs.c:50)
   by 0x........: main (vstrs.c:63)

Use of uninitialised value of size 8
   at 0x........: test_vstrs_char (vstrs.c:54)
   by 0x........: main (vstrs.c:63)

Use of uninitialised value of size 8
   at 0x........: test_vstrs_char (vstrs.c:50)
   by 0x........: main (vstrs.c:65)

Use of uninitialised value of size 8
   at 0x........: test_vstrs_char (vstrs.c:54)
   by 0x........: main (vstrs.c:65)

