deepseek-ai/deepseek-harness · error · Error
dsh-scope: scope parent link would form a cycle
Error message
dsh-scope: scope parent link would form a cycle
What it means
Error "dsh-scope: scope parent link would form a cycle" thrown in deepseek-ai/deepseek-harness.
Source
Thrown at packages/core/scope/src/index.ts:56
*/
const scopeParents = new WeakMap<ScopeKey, ScopeKey>()
/** The privileged handle to move one scope key's parent link. */
export interface ScopeParentBinding {
/**
* Re-link the bound key to a different parent, with the same cycle check as
* the bind. Valid only while nothing produced under the old parent is
* retained — the blank-session recompose contract, which the holder upholds
* because this relation cannot see what a session logged.
* @param parent - the new enclosing scope key.
*/
rebind(parent: ScopeKey): void
}
/** Cycle-checked write shared by the bind and every rebind. */
function linkScopeParent(key: ScopeKey, parent: ScopeKey): void {
for (let cursor: ScopeKey | undefined = parent; cursor !== undefined; cursor = scopeParents.get(cursor)) {
if (cursor === key) throw new Error('dsh-scope: scope parent link would form a cycle')
}
scopeParents.set(key, parent)
}
/**
* Bind `parent` as `key`'s enclosing scope, once.
*
* A key that already has a parent throws: there is no open re-link path, so a
* scope's ancestry cannot be moved by anyone but the original binder, who
* alone receives the {@link ScopeParentBinding}. A link that would close a
* cycle is rejected, because every chain consumer walks parents to the root.
* @param key - the child scope key.
* @param parent - its enclosing scope key.
* @returns the binding that alone may re-link this key.
*/
export function bindScopeParent(key: ScopeKey, parent: ScopeKey): ScopeParentBinding {
if (scopeParents.has(key)) {
throw new Error('dsh-scope: scope key is already bound to a parent; re-linking requires the binding returned by the original bind')View on GitHub (pinned to b150a551b8)
Solutions
- Restructure the scope hierarchy so the parent link does not form a cycle.
When it happens
Trigger: Thrown at packages/core/scope/src/index.ts:56 when the library encounters an invalid state.
Common situations: See trigger scenarios.
AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24).
Data as JSON: /api/errors/a05e84ea71296a5a.
Report an issue: GitHub.