diff options
| -rw-r--r-- | crates/proc-macro-api/src/version.rs | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/crates/proc-macro-api/src/version.rs b/crates/proc-macro-api/src/version.rs index 13f67a0128a..48efbf589c6 100644 --- a/crates/proc-macro-api/src/version.rs +++ b/crates/proc-macro-api/src/version.rs @@ -135,7 +135,12 @@ pub fn read_version(dylib_path: &AbsPath) -> io::Result<String> { } }; - let mut snappy_decoder = SnapDecoder::new(snappy_portion); + let mut uncompressed: Box<dyn Read> = if &snappy_portion[0..4] == b"rust" { + // Not compressed. + Box::new(snappy_portion) + } else { + Box::new(SnapDecoder::new(snappy_portion)) + }; // the bytes before version string bytes, so this basically is: // 8 bytes for [b'r',b'u',b's',b't',0,0,0,5] @@ -144,11 +149,11 @@ pub fn read_version(dylib_path: &AbsPath) -> io::Result<String> { // so 13 bytes in total, and we should check the 13th byte // to know the length let mut bytes_before_version = [0u8; 13]; - snappy_decoder.read_exact(&mut bytes_before_version)?; + uncompressed.read_exact(&mut bytes_before_version)?; let length = bytes_before_version[12]; let mut version_string_utf8 = vec![0u8; length as usize]; - snappy_decoder.read_exact(&mut version_string_utf8)?; + uncompressed.read_exact(&mut version_string_utf8)?; let version_string = String::from_utf8(version_string_utf8); version_string.map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e)) } |