wasmerio/wasmer · error

failed to read v8 archive cache {}: {err}

Error message

failed to read v8 archive cache {}: {err}

What it means

Error "failed to read v8 archive cache {}: {err}" thrown in wasmerio/wasmer.

Source

Thrown at lib/api/build.rs:101

                });
            archive_tmp.write_all(&tar_data).unwrap_or_else(|err| {
                panic!(
                    "failed to write temporary v8 archive download file {}: {err}",
                    archive_tmp.path().display()
                )
            });
            archive_tmp.persist(&archive_path).unwrap_or_else(|err| {
                panic!(
                    "failed to finalize v8 archive cache {} from temporary file {}: {}",
                    archive_path.display(),
                    err.file.path().display(),
                    err.error
                )
            });
        }

        let tar_data = fs::read(&archive_path).unwrap_or_else(|err| {
            panic!(
                "failed to read v8 archive cache {}: {err}",
                archive_path.display()
            )
        });
        let unpack_tmp = tempfile::TempDir::new_in(&cache_dir).unwrap_or_else(|err| {
            panic!(
                "failed to create temporary wee8 unpack directory in {}: {err}",
                cache_dir.display()
            )
        });
        let tar = xz::read::XzDecoder::new(tar_data.as_slice());
        let mut archive = tar::Archive::new(tar);
        archive.unpack(unpack_tmp.path()).unwrap_or_else(|err| {
            let _ = fs::remove_file(&archive_path);
            panic!(
                "failed to unpack v8 archive cache {} into {} (cache removed so the next build can re-download): {err}",
                archive_path.display(),
                unpack_tmp.path().display()

View on GitHub (pinned to 8c4b9ee9d3)

When it happens

Trigger: Thrown at lib/api/build.rs:101 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of wasmerio/wasmer@8c4b9ee9d3 (2026-09-01). Data as JSON: /api/errors/f4b454c3f0698fda. Report an issue: GitHub.