{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"println!(\"cargo::rustc-env=PROC_MACRO_TEST_LOCATION=\\\"\\\"\");"}]}
        println!("cargo::rustc-env=PROC_MACRO_TEST_LOCATION=\"\"");
        println!("proc-macro-test testing only works on nightly toolchains");
        return;