disable LV grad checks on CI completely

Author: Michael Abbott

test/group-3.jl

@@ -145,17 +145,20 @@ end
 
 @testset "parsing + LoopVectorization" begin include("parsing.jl") end
 
-Threads.nthreads() > 1 && test_group == "3" && exit()  # Github CI times out on multi-thread LV gradient checks?
+if test_group != "3" # Github CI fails, on some runs, "ERROR: Package Tullio errored during testing (received signal: KILL)"
+    # https://github.com/mcabbott/Tullio.jl/pull/57/checks?check_run_id=1753332805
 
-using Tracker
-GRAD = :Tracker
-_gradient(x...) = Tracker.gradient(x...)
+    using Tracker
+    GRAD = :Tracker
+    _gradient(x...) = Tracker.gradient(x...)
 
-@tullio grad=Base
-@testset "gradients: Tracker + DiffRules + LoopVectorization" begin include("gradients.jl") end
+    @tullio grad=Base
+    @testset "gradients: Tracker + DiffRules + LoopVectorization" begin include("gradients.jl") end
 
-@tullio grad=Dual
-@testset "gradients: Tracker + ForwardDiff + LoopVectorization" begin include("gradients.jl") end
+    @tullio grad=Dual
+    @testset "gradients: Tracker + ForwardDiff + LoopVectorization" begin include("gradients.jl") end
+
+end
 
 @info @sprintf("LoopVectorization tests took %.1f seconds", time()-t8)