void main() {
foreach(i; 0..s.length) {}
}
-------
When compiling the above code with dmd 2.047 on Windows XP SP3, I get the following error:
test.d(2): Error: undefined identifier s
Assertion failure: '0' on line 2237 in 'statement.c'

Testing it on Windows 98 with dmd 2.036 didn't yield this error (It caught the undefined identifier, but didn't fail an assert.)