SIFR-STDLIB-0004: Standard-library cache build or reuse failure. - Sifr

SIFR-STDLIB-0004 belongs to the Standard library surface diagnostic family. It means: standard-library cache build or reuse failure.

Why It Happens

The selected standard-library surface is not supported in this form. Use the documented sifr.* contract for the API you need.

Use sifr --explain SIFR-STDLIB-0004 locally to see the renderer’s exact message template and any machine-applicable suggestions for the compiler version you are running.

Erroneous Code

values = defaultdict()

How To Fix It

Use the supported sifr.* surface and constructor shape. Some CPython conveniences are intentionally absent or require explicit arguments.

Fixed Code

from sifr.collections import defaultdict

values = defaultdict(lambda: 0)

Details

Field	Value
Code	`SIFR-STDLIB-0004`
Family	`STDLIB`
Severity	Error
Stability	stable
Owner	`sifr_driver::stdlib::cache`
Representative fixture	`crates/sifr_driver/src/tests/project_build_check.rs`

See the Error Codes index for the complete catalog.