v0.6.42

Zygote v0.6.42

Diff since v0.6.41

Closed issues:

• Flux.train error when using reduce hcat in loss (#626)
• Broadcasting fails for functions with adjoint 'nothing' (#642)
• Incorrect Wirtinger for prod operation (#744)
• Surprising error when constructing diagonal matrix (#771)
• dropdims gives MethodError in v0.5.6 when training with Flux.jl (#784)
• accum NamedTuple sometimes silently drops derivatives (#861)
• Dot product differentiation (#982)
• unique() error in pullback (#1053)
• Adjoint of cholesky is hard-coded for the CPU (#1210)
• Deprecate @nograd and dropgrad in favour of ChainRulesCore.@non_differentiable and ChainRulesCore.ignore_derivatives (#1235)
• Remove @adjoint for adjoint/Adjoint in favor of ChainRules (#1257)
• Error message link 404 error (#1260)

Merged pull requests:

• deprecate Zygote.@nograd (#1249) (@mzgubic)
• rm rules for Statistics.var, std, mean (#1252) (@mcabbott)
• rm adjoint & transpose adjoints (#1259) (@mcabbott)
• Fix link in error message (#1265) (@ziyiyin97)
• Replace @require CUDA with using GPUArraysCore (#1272) (@mcabbott)