loading: prevent module replacement during precompile

This is theoretically okay, but unlikely to be intended ever.
JuliaLang · Jun 30, 2022 · d81724a · d81724a
1 parent fec6951
commit d81724a
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/base/loading.jl b/base/loading.jl
@@ -1193,7 +1193,11 @@ root_module_key(m::Module) = @lock require_lock module_keys[m]
     if haskey(loaded_modules, key)
         oldm = loaded_modules[key]
         if oldm !== m
-            @warn "Replacing module `$(key.name)`"
+            if (0 != ccall(:jl_generating_output, Cint, ())) && (JLOptions().incremental != 0)
+                error("Replacing module `$(key.name)`")
+            else
+                @warn "Replacing module `$(key.name)`"
+            end
         end
     end
     loaded_modules[key] = m