Squashed 'external/capstone/' content from commit e46f64fa

git-subtree-dir: external/capstone
git-subtree-split: e46f64fadb351e9ecd05264fab26f2772feb0994

tests/integration/test_assert_macros.c

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+// SPDX-FileCopyrightText: 2025 Rot127 <unisono@quyllur.org>
+// SPDX-License-Identifier: LGPL-3.0-only
+
+// Has to be built as Release build or with CAPSTONE_ASSERTION_WARNINGS.
+
+#include <capstone/platform.h>
+#include <capstone/capstone.h>
+
+// Test: https://github.com/capstone-engine/capstone/issues/2791
+static bool test_cs_reg_null_case()
+{
+	csh handle;
+	if (cs_open(CS_ARCH_AARCH64, (cs_mode)0, &handle) != CS_ERR_OK) {
+		printf("Open failed\n");
+		return false;
+	}
+	// Invalid register id 0 should return NULL.
+	if (cs_reg_name(handle, 0) != NULL) {
+		printf("NULL check failed\n");
+		return false;
+	}
+	cs_close(&handle);
+	return true;
+}
+
+int main()
+{
+	bool result = true;
+	result &= test_cs_reg_null_case();
+
+	return result ? 0 : -1;
+}