# panic: interface conversion: interface {} is X, not Y

- **ID:** `go/panic-interface-conversion-interface-is-x-not-y`
- **Domain:** go
- **Category:** type_error
- **Verification:** official
- **Fix Rate:** 80%

## Root Cause

Type assertion failed. The interface holds a different concrete type than expected.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 1.x | active | — | — |