Fix JuliaDiff#714: Make TAGCOUNT always greater than the last instant…

…iated Tag's count
Technici4n · Nov 18, 2024 · 4cb3336 · 4cb3336
1 parent 3acc8a6
commit 4cb3336
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/config.jl b/src/config.jl
@@ -14,7 +14,9 @@ const TAGCOUNT = Threads.Atomic{UInt}(0)
 end
 
 function Tag(f::F, ::Type{V}) where {F,V}
-    tagcount(Tag{F,V}) # trigger generated function
+    count = tagcount(Tag{F,V}) # trigger generated function
+    # make sure inner derivatives have a higher count even if this Tag instantiation was precompiled; fixes #714
+    Threads.atomic_max!(TAGCOUNT, count+1)
     Tag{F,V}()
 end