Unicode characters not working properly in regex

[asoltysik]

Trying to compile this code:

val other = "^[^\u0000-\u00a0\u1680\u2000-\u200a\u202f\u205f\u3000\u2028\u2029]$"

Pattern.compile(other, Pattern.CASE_INSENSITIVE)

Gives me this error:
java.util.regex.PatternSyntaxException: Unclosed character class near index 1 ^[^-   -   　

]$ ^ at java.lang.Throwable::fillInStackTrace_class.java.lang.Throwable at java.lang.Throwable::init_class.java.lang.String_class.java.lang.Throwable at java.lang.Exception::init_class.java.lang.String_class.java.lang.Throwable at java.lang.RuntimeException::init_class.java.lang.String_class.java.lang.Throwable at java.lang.IllegalArgumentException::init_class.java.lang.String_class.java.lang.Throwable at java.lang.IllegalArgumentException::init at java.util.regex.PatternSyntaxException::init_class.java.lang.String_class.java.lang.String_i32 at java.util.regex.Pattern$::compile_class.java.lang.String_i32_bool_class.java.util.regex.Pattern at java.util.regex.Pattern$::compile_class.java.lang.String_i32_class.java.util.regex.Pattern at example.Main$::main_class.ssnr.ObjectArray_unit at main at __libc_start_main at _start at java.lang.RuntimeException: Nonzero exit code: 1 at scala.sys.package$.error(package.scala:27)

It compiles on JVM: http://ideone.com/r2I2gm
And it does in Go, which uses re2: http://ideone.com/CGrZar

[densh]

Thanks for the bug report!

[densh]

From the first glance it looks like our current regex completely ignores the fact utf-8 and utf-16 that we use for in-memory representation of strings are two completely separate beasts.