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Diffstat (limited to '')
| -rw-r--r-- | compiler/rustc_serialize/src/opaque.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_serialize/src/opaque.rs b/compiler/rustc_serialize/src/opaque.rs index 5c17ef6ac..f35cc08f4 100644 --- a/compiler/rustc_serialize/src/opaque.rs +++ b/compiler/rustc_serialize/src/opaque.rs @@ -193,7 +193,9 @@ impl FileEncoder { // shaves an instruction off those code paths (on x86 at least). assert!(capacity <= usize::MAX - max_leb128_len()); - let file = File::create(path)?; + // Create the file for reading and writing, because some encoders do both + // (e.g. the metadata encoder when -Zmeta-stats is enabled) + let file = File::options().read(true).write(true).create(true).truncate(true).open(path)?; Ok(FileEncoder { buf: Box::new_uninit_slice(capacity), |