digamma-trigamma Knet errors

f = SpecialFunctions.digamma
(f, t) = (SpecialFunctions.digamma, Float32)
(f, t, n) = (SpecialFunctions.digamma, Float32, 1)
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(digamma)}(SpecialFunctions.digamma), 0.2618932f0, -4.031657f0, 15.752012f0, NaN32, Any[Float32[0.261893]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float32, (1, 1))
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(digamma)}(SpecialFunctions.digamma), 0.69419265f0, -1.2365913f0, 2.874851f0, NaN32, Any[Float32[0.694193]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float32, 2)
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(digamma)}(SpecialFunctions.digamma), 0.64674807f0, -2.687751f0, 3.215733f0, NaN32, Any[Float32[0.646748, 0.670356]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float32, (2, 1))
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(digamma)}(SpecialFunctions.digamma), 0.51649374f0, -3.4034107f0, 4.6650777f0, NaN32, Any[Float32[0.516494; 0.605973]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float32, (1, 2))
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(digamma)}(SpecialFunctions.digamma), 0.51312476f0, -4.513994f0, 4.7294397f0, NaN32, Any[Float32[0.513125 0.392904]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float32, (2, 2))
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(digamma)}(SpecialFunctions.digamma), 0.6723453f0, -6.7107944f0, 3.0178785f0, NaN32, Any[Float32[0.672345 0.495193; 0.732261 0.44053]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t) = (SpecialFunctions.digamma, Float64)
(f, t, n) = (SpecialFunctions.digamma, Float64, 1)
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox([-2.06157], [-2.06157])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float64, (1, 1))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox([-1.86519], [-1.86519])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float64, 2)
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox([-1.72367, -1.75257], [-1.72367, -1.75257])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float64, (2, 1))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox([-1.8009; -1.25649], [-1.8009; -1.25649])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.digamma, Float64, (1, 2))
(f, t, n) = (SpecialFunctions.digamma, Float64, (2, 2))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox([-1.34687 -2.02528; -3.86458 -2.35303], [-1.34687 -2.02528; -3.86458 -2.35303])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
f = SpecialFunctions.trigamma
(f, t) = (SpecialFunctions.trigamma, Float32)
(f, t, n) = (SpecialFunctions.trigamma, Float32, 1)
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox(Float32[2.92088], Float32[NaN])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(trigamma)}(SpecialFunctions.trigamma), 0.6868629f0, NaN32, NaN32, -6.787856f0, Any[Float32[0.686863]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.trigamma, Float32, (1, 1))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox(Float32[5.05545], Float32[NaN])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(trigamma)}(SpecialFunctions.trigamma), 0.49297625f0, NaN32, NaN32, -17.532457f0, Any[Float32[0.492976]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.trigamma, Float32, 2)
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox(Float32[7.91243, 5.64607], Float32[NaN, NaN])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(trigamma)}(SpecialFunctions.trigamma), 0.38156474f0, NaN32, NaN32, -37.025417f0, Any[Float32[0.381565, 0.4623]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.trigamma, Float32, (2, 1))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox(Float32[7.05215; 3.85413], Float32[NaN; NaN])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(trigamma)}(SpecialFunctions.trigamma), 0.40710402f0, NaN32, NaN32, -30.618752f0, Any[Float32[0.407104; 0.579204]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.trigamma, Float32, (1, 2))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox(Float32[5.25425 7.37346], Float32[NaN NaN])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(trigamma)}(SpecialFunctions.trigamma), 0.48200172f0, NaN32, NaN32, -18.714846f0, Any[Float32[0.482002 0.39699]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t, n) = (SpecialFunctions.trigamma, Float32, (2, 2))
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:39
  Expression: isapprox(cy, Array(gy))
   Evaluated: isapprox(Float32[3.04625 3.86985; 13.2549 4.19562], Float32[NaN NaN; NaN NaN])
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:36 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(fn, xi, f0, nd, ad, x) = (getfield(Main, Symbol("##17#20")){typeof(trigamma)}(SpecialFunctions.trigamma), 0.6690652f0, NaN32, NaN32, -7.310215f0, Any[Float32[0.669065 0.577783; 0.287416 0.550409]])
unary: Test Failed at /home/ec2-user/.julia/dev/Knet/test/unary.jl:40
  Expression: gradcheck(bf, gx)
Stacktrace:
 [1] macro expansion at /home/ec2-user/.julia/dev/Knet/test/unary.jl:37 [inlined]
 [2] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1083 [inlined]
 [3] top-level scope at /home/ec2-user/.julia/dev/Knet/test/unary.jl:6
(f, t) = (SpecialFunctions.trigamma, Float64)
(f, t, n) = (SpecialFunctions.trigamma, Float64, 1)
(f, t, n) = (SpecialFunctions.trigamma, Float64, (1, 1))
(f, t, n) = (SpecialFunctions.trigamma, Float64, 2)
(f, t, n) = (SpecialFunctions.trigamma, Float64, (2, 1))
(f, t, n) = (SpecialFunctions.trigamma, Float64, (1, 2))
(f, t, n) = (SpecialFunctions.trigamma, Float64, (2, 2))