Hello.

I have found the following bug in limit.

┌────────────────────────────────────────────────────────────────────┐

│ SageMath version 8.6, Release Date: 2019-01-15                     │

│ Using Python 2.7.15. Type "help()" for help.                       │

└────────────────────────────────────────────────────────────────────┘

sage: f=exp(-*2**x^*2*)-cos(*2**x);f

-cos(2*x) + e^(-2*x^2)

sage: g=x*(sin(x))^*3*;g

x*sin(x)^3

sage: lim(f/g,x=*0*) # this is wrong

und

sage: lim(f/g,x=*0*,dir='-'),lim(f/g,x=*0*,dir='+') # the second result is 
wrong

(4/3, +Infinity)

sage: taylor(f/g,x,*0*,*3*) # this is right

-26/45*x^2 + 4/3

sage: lim(f/x^*4*,x=*0*) # this is right too

4/3

sage: 

Any ideas?  Thanks in advance.

Guillermo

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