This is the release of v4.0.0b2. See here for the complete list of solved issues and merged PRs.

New Features

• LSQR (#745, thanks @KotaroSetoyama!)
• Incorporate persistent RNN functions of cuDNN v6 (#549, thanks @aonotas!)
• cupy.moveaxis (#684, thanks @fukatani!)
• default_casting option to ufuncs (#720)

Improvements

• Support None as an argument for clip method (#802)

Bug Fixes

• Fix matmul to raise ValueError on invalid shapes (#737)
• Fix RandomState.choice reproducibility (#741)
• Fix a bug in stack (#749)
• Make order=None work like default order (#764, thanks @kohr-h!)
• Fix to correctly display filename of CUDA dump (#777)
• Fix a bug about grouped convolution (#785, thanks @anaruse!)
• Fix order=None of unravel_index (#791, thanks @Hakuyume!)
• Cast CUPY_SEED environment variable to uint64 (#805, thanks @toslunar!)

Tests

• Add test cases for tie of argmin and argmax (#774)
• Fix checks for exceptions with inheritance (#788)
• Skip a test using numpy.stack in numpy 1.9 (#803)
• Skip a test using numpy.matmul in numpy 1.9 (#817)

Documentation

• Improve dependency description in documentation (#767)
• Fix typo in environment variable reference (#769)
• Document Compute Capability requirement (#772)
• Improve documentation of ElementwiseKernel.__call__ (#786)
• Add documentation for accept_error argument in testing.numpy_cupy_raises (#787)
• Fix wrong documentation in testing.numpy_cupy_equal (#804)
• Expose signatures of methods to reference (#808)

Others

• Add pytest cache directory to gitignore (#797)