diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_metadata/src/rmeta/encoder.rs | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs index 2b5bafb8b9c..41de298bcfd 100644 --- a/compiler/rustc_metadata/src/rmeta/encoder.rs +++ b/compiler/rustc_metadata/src/rmeta/encoder.rs @@ -2254,10 +2254,10 @@ fn encode_metadata_impl(tcx: TyCtxt<'_>, path: &Path) { let root = ecx.encode_crate_root(); ecx.opaque.flush(); - let mut file = std::fs::OpenOptions::new() - .write(true) - .open(path) - .unwrap_or_else(|err| tcx.sess.fatal(&format!("failed to open the file: {}", err))); + + let mut file = ecx.opaque.file(); + // We will return to this position after writing the root position. + let pos_before_seek = file.stream_position().unwrap(); // Encode the root position. let header = METADATA_HEADER.len(); @@ -2267,6 +2267,9 @@ fn encode_metadata_impl(tcx: TyCtxt<'_>, path: &Path) { file.write_all(&[(pos >> 24) as u8, (pos >> 16) as u8, (pos >> 8) as u8, (pos >> 0) as u8]) .unwrap_or_else(|err| tcx.sess.fatal(&format!("failed to write to the file: {}", err))); + // Return to the position where we are before writing the root position. + file.seek(std::io::SeekFrom::Start(pos_before_seek)).unwrap(); + // Record metadata size for self-profiling tcx.prof.artifact_size( "crate_metadata", |