Store rlink data in opaque binary format on disk

1 files changed, 5 insertions, 3 deletions

diff --git a/compiler/rustc_driver/src/lib.rs b/compiler/rustc_driver/src/lib.rs
index acf221a08ee..ca4e7b5142e 100644
--- a/compiler/rustc_driver/src/lib.rs
+++ b/compiler/rustc_driver/src/lib.rs
@@ -29,7 +29,7 @@ use rustc_log::stdout_isatty;
 use rustc_metadata::locator;
 use rustc_save_analysis as save;
 use rustc_save_analysis::DumpHandler;
-use rustc_serialize::json::{self, ToJson};
+use rustc_serialize::json::ToJson;
 use rustc_session::config::{nightly_options, CG_OPTIONS, DB_OPTIONS};
 use rustc_session::config::{ErrorOutputType, Input, OutputType, PrintRequest, TrimmedDefPaths};
 use rustc_session::cstore::MetadataLoader;
@@ -595,10 +595,12 @@ impl RustcDefaultCalls {
                 // FIXME: #![crate_type] and #![crate_name] support not implemented yet
                 sess.init_crate_types(collect_crate_types(sess, &[]));
                 let outputs = compiler.build_output_filenames(sess, &[]);
-                let rlink_data = fs::read_to_string(file).unwrap_or_else(|err| {
+                let rlink_data = fs::read(file).unwrap_or_else(|err| {
                     sess.fatal(&format!("failed to read rlink file: {}", err));
                 });
-                let codegen_results: CodegenResults = json::decode(&rlink_data);
+                let mut decoder = rustc_serialize::opaque::Decoder::new(&rlink_data, 0);
+                let codegen_results: CodegenResults =
+                    rustc_serialize::Decodable::decode(&mut decoder);
                 let result = compiler.codegen_backend().link(sess, codegen_results, &outputs);
                 abort_on_err(result, sess);
             } else {