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-rw-r--r--src/core/pool_func.hpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/core/pool_func.hpp b/src/core/pool_func.hpp
index 2f87d3de2..299aee86c 100644
--- a/src/core/pool_func.hpp
+++ b/src/core/pool_func.hpp
@@ -123,6 +123,10 @@ DEFINE_POOL_METHOD(void *)::GetNew(size_t size)
{
size_t index = this->FindFirstFree();
+#ifdef OTTD_ASSERT
+ assert(this->checked != 0);
+ this->checked--;
+#endif /* OTTD_ASSERT */
if (index == NO_FREE_ITEM) {
error("%s: no more free items", this->name);
}