Error when the last integration step is smaller than dtmin

[radlicka]

The step size algorithm checks the size of the last integration step and when it is lower than dtmin the warning is displayed and integration is terminated. I understand that it is not a typical case but it causes random code errors. A simple example is below.
Tomas

using DifferentialEquations
# Simple example from DifferentialEquation.jl documentation
f(u,p,t) = 1.01*u
u0 = 1/2
tspan = (0.0,1.0)
prob = ODEProblem(f,u0,tspan)
sol = solve(prob, Tsit5(), reltol=1e-8, abstol=1e-8)
# Change tspan to end integration 1.0e-6 after sol.t[end-1] - the last step is 1e-6
tspan=(0.0,sol.t[end-1]+1e-6)
prob = ODEProblem(f,u0,tspan)
# when the dtmin is higher than the last step (>1.0e-6) the warning is displayed and the integration is terminated
sol = solve(prob, Tsit5(), reltol=1e-8, abstol=1e-8,dtmin=1e-5);