We are now getting really close to the final release! The new release candidate, Scala 2.9.1 RC4, is currently available for testing: you can find it on our Download Page. This is a maintenance release: several bugs have been fixed, and other improvements introduced. The new release is intended to be fully binary compatible with the existing version 2.9.0.1.

Please help us testing this new release candidate, and let us know of any issues you may detect, or of any binary incompatibility issue that you may encounter. A description of the improvements in Scala 2.9.1 is available below.

The Scala 2.9.1 distribution

This Release Candidate is made available for testing purposes only and is not intended for production environments. We will wait 7 days in order to allow developers and testers to send us their feedback, and if no critical faults are reported we will release 2.9.1 final on August 31st.

What is new?

The 2.9.1 release of Scala includes many bug fixes and improvements, in particular to the interpreter: most of the interpreter changes available in the development mainline have been ported to the 2.9.x release branch.

In addition, the following changes (bug fixes and improvements) have also been ported:

24909, 24919, 24941, 24961, 24963, 24965, 24981, 24984, 24986, 24987, 24992, 24993, 24999, 25000, 25001, 25002, 25003, 25004, 25005, 25006, 25007, 25008, 25009, 25010, 25015, 25028, 25029, 25030, 25031, 25033, 25038, 25039, 25040, 25041, 25044, 25045, 25046, 25048, 25050, 25051, 25052, 25053, 25054, 25055, 25057, 25058, 25059, 25061, 25062, 25063, 25065, 25066, 25069, 25068, 25070, 25071, 25072, 25074, 25075, 25076, 25080, 25081, 25082, 25083, 25085, 25087, 25088, 25090, 25091, 25092, 25093, 25094, 25095, 25096, 25097, 25099, 25100, 25101, 25110, 25111, 25112, 25113, 25114, 25117, 25119, 25122, 25124, 25125, 25126, 25127, 25128, 25130, 25132, 25133, 25134, 25135, 25136, 25137, 25138, 25138, 25139, 25140, 25141, 25142, 25144, 25145, 25146, 25148, 25149, 25152, 25153, 25158, 25160, 25161, 25162, 25164, 25167, 25169, 25170, 25171, 25172, 25202, 25204, 25207, 25208, 25209, 25212, 25252, 25374, 25375, 25377, 25379, 25380, 25381, 25384, 25385, 25390, 25404, 25405, 25462, 25504, 25506, 25509, 25531, 25534, 25544, 25548, 25549.

Among the bug fixed in this release are:

SI-1048, SI-3501, SI-4237, SI-4547, SI-4556, SI-4588, SI-4593, SI-4603, SI-4614, SI-4659, SI-4660, SI-4662, SI-4671, SI-4678, SI-4692, SI-4705, SI-4712, SI-4748, SI-4752, SI-4757, SI-4759, SI-4782, SI-4791, SI-4821.