---
id: "bug-1496"
status: "fixed"
status_updated: "2026-09-24"
status_note: ""
component: "scheduler"
severity: "unknown"
timestamp: "2026-08-04T00:00:00Z"
last_seen: "2026-09-19T09:00:00Z"
occurrences: 1
files: ["src/scheduler/src/snapshot_load.c"]
tags: ["scheduler-core", "task-8.1", "snapshot_load.c", "prng_seed", "round-trip-gap"]
related: []
legacy: true
---

# bug-1496: xce_sched_core_load_snapshot() never restored core->prng_seed from the snapshot -- a freshly…

## Description
xce_sched_core_load_snapshot() never restored core->prng_seed from the snapshot -- a freshly loaded core silently kept xce_sched_core_init()'s default (0) instead of the value xce_sched_core_save_snapshot() had captured. Caught by test_snapshot_save_load.c's field-level assertion: TEST_ASSERT_EQUAL_UINT64(0xDEADBEEFULL, core_b.prng_seed) failed with Expected 3735928559 Was 0 after a successful save+load round trip.

## Environment
_Not recorded (migrated from buglog.json)._

## Reproduction
_Not recorded (migrated from buglog.json)._

## Root cause
save_snapshot() (snapshot.c) correctly writes `out->prng_seed = core->prng_seed;`, but the corresponding `core->prng_seed = in->prng_seed;` assignment was simply missing from load_snapshot()'s field-copy sequence -- an incomplete round trip for a field the function's own header comment (snapshot.c, 'PRNG seed resolution') explicitly documents as in scope (Req 5 AC 21's 'PRNG state' checklist row).

## Fix
Added `core->prng_seed = in->prng_seed;` to xce_sched_core_load_snapshot() (snapshot_load.c), placed after the jobs-restoration loop and before the internal_state restoration block. Verified via the same field-level assertion, now passing.

## Verification
_Not recorded (migrated from buglog.json)._

## References
_Not recorded (migrated from buglog.json)._