chore: import upstream snapshot with attribution

tests/test-autorelease.cpp

@@ -0,0 +1,24 @@
+// ref: https://github.com/ggml-org/llama.cpp/issues/4952#issuecomment-1892864763
+
+#include <cstdio>
+#include <string>
+#include <thread>
+
+#include "llama.h"
+#include "get-model.h"
+
+// This creates a new context inside a pthread and then tries to exit cleanly.
+int main(int argc, char ** argv) {
+    auto * model_path = get_model_or_exit(argc, argv);
+
+    std::thread([&model_path]() {
+        llama_backend_init();
+        auto * model = llama_model_load_from_file(model_path, llama_model_default_params());
+        auto * ctx = llama_init_from_model(model, llama_context_default_params());
+        llama_free(ctx);
+        llama_model_free(model);
+        llama_backend_free();
+    }).join();
+
+    return 0;
+}