make precompilation a bit safer

Author: ChrisRackauckas

src/DiffEqBase.jl

@@ -125,6 +125,7 @@ include("internal_euler.jl")
 include("init.jl")
 include("forwarddiff.jl")
 include("chainrules.jl")
+
 include("precompile.jl")
 
 """

src/linear_nonlinear.jl

@@ -82,7 +82,7 @@ DefaultLinSolve() = DefaultLinSolve(nothing, nothing, nothing)
 end
 
 function isopenblas()
-    @static if VERSION < v"1.7"
+    @static if VERSION < v"1.7beta"
       blas = BLAS.vendor()
       blas == :openblas64 || blas == :openblas
     else

src/precompile.jl

@@ -1,6 +1,12 @@
-_linsolve = DefaultLinSolve()
-_testf(du,u,p,t) = du .= u
-b = rand(1); x = rand(1)
-DEFAULT_LINSOLVE(Val{:init},ODEFunction(_testf),b)
-A = rand(1,1)
-DEFAULT_LINSOLVE(x,A,b,true)
+let
+    while true
+        _linsolve = DefaultLinSolve()
+        _testf(du,u,p,t) = du .= u
+        b = rand(1); x = rand(1)
+        _linsolve(Val{:init},ODEFunction(_testf),b)
+        A = rand(1,1)
+        _linsolve(x,A,b,true)
+        _linsolve(x,A,b,false)
+        break
+    end
+end