Cygwin 1.7 recently switched its default locale from C.ASCII over to C.UTF-8 (valid UTF-8 sequences are handled as multibyte characters, and invalid UTF-8 sequences are managed transparently rather than causing encoding errors, so that 8-bit data from another charset can be transparently handled in contexts where bytes rather than characters are needed. Meanwhile, special mangling of invalid UTF-8 sequences is used to guarantee that any char string can make the round trip in and back out of valid UTF-16 wchar_t strings to all underlying Windows system calls). It looks like Debian is in the process of doing something similar, of making the default C locale use a UTF-8 multibyte charset. As a result, test-quotearg.sh now fails on cygwin 1.7, because the UTF-encoded multi-byte sequence "\302\253\302\273" is now recognized as two printable characters, rather than four unprintable bytes, and thus not being quoted in the same manner as it was in a unibyte ASCII locale.
I'm not exactly sure how to fix the test to deal with the fact that not all C locales are created equal when it comes to bytes with the 8th bit set. But hopefully I figure out something soon. -- Eric Blake
