On OS X Catalina, running 'solve' in DifferentialEquations causes crash

General Usage
16

For Example 3 from that tutorial page I linked on the first page, it appears 1.4.2 runs significantly faster:

julia> @btime solve(prob);
  101.799 μs (3991 allocations: 112.48 KiB)

julia> @btime solve(prob);
  102.888 μs (3991 allocations: 112.48 KiB)

julia> versioninfo()
Julia Version 1.4.2

julia> @btime solve(prob);
  660.923 μs (3989 allocations: 113.94 KiB)

julia> @btime solve(prob);
  658.327 μs (3989 allocations: 113.94 KiB)

julia> versioninfo()
Julia Version 1.6.0-DEV.306

And for your sum code:

julia> @btime mysum($x)
  6.459 ns (0 allocations: 0 bytes)
59.37744793932639

julia> versioninfo()
Julia Version 1.4.2

julia> @btime mysum($x)
  6.332 ns (0 allocations: 0 bytes)
66.60390799012274

julia> versioninfo()
Julia Version 1.6.0-DEV.306