oh betty

Author: ChrisRackauckas

lib/OrdinaryDiffEqCore/src/integrators/integrator_interface.jl

@@ -221,8 +221,8 @@ function resize!(integrator::ODEIntegrator, i::Int)
         # may be required for things like units
         c !== nothing && resize!(c, i)
     end
-    resize!(integrator.fsalfirst, i)
-    resize!(integrator.fsallast, i)
+    !isnothing(integrator.fsalfirst) && resize!(integrator.fsalfirst, i)
+    !isnothing(integrator.fsallast) && resize!(integrator.fsallast, i)
     resize_f!(integrator.f, i)
     resize_nlsolver!(integrator, i)
     resize_J_W!(cache, integrator, i)
@@ -235,8 +235,8 @@ function resize!(integrator::ODEIntegrator, i::NTuple{N, Int}) where {N}
     for c in full_cache(cache)
         resize!(c, i)
     end
-    resize!(integrator.fsalfirst, i)
-    resize!(integrator.fsallast, i)
+    !isnothing(integrator.fsalfirst) && resize!(integrator.fsalfirst, i)
+    !isnothing(integrator.fsallast) && resize!(integrator.fsallast, i)
     resize_f!(integrator.f, i)
     # TODO the parts below need to be adapted for implicit methods
     isdefined(integrator.cache, :nlsolver) && resize_nlsolver!(integrator, i)