self-referential c record imports

compiler_tests.odin

@@ -1972,6 +1972,20 @@ by_value_c_records_and_unions_compile_and_link :: proc(t: ^testing.T) {
 	testing.expect_value(t, state.exit_code, 1)
 }
 
+@(test)
+self_referential_c_records_import_and_compile :: proc(t: ^testing.T) {
+	// `struct Node { struct Node *next; int value; }`: the importer must not recurse
+	// forever populating the self-referential record, and the checker must accept the
+	// self-referential `?*mut Node` field as C-layout-compatible.
+	output := "/tmp/brolang-test-recursive"
+	defer _ = os.remove(output)
+	c_options := cimport.Options{include_paths=[]string{"examples/interop/recursive/include"}}
+	status := compiler_core.compile_package("examples/interop/recursive/app", output, nil, target.DEFAULT, c_options)
+	testing.expect_value(t, status, 0)
+	state := run_executable(output)
+	testing.expect_value(t, state.exit_code, 0)
+}
+
 @(test)
 unsupported_c_header_members_diagnose_only_when_referenced :: proc(t: ^testing.T) {
 	output := "/tmp/brolang-test-header-unsupported"