dynamorio x86 scattergather tests fail with "gather result does not match"

In the master merge for PR #7667, the x86-64 test workflow had the following failures:

2025-10-14T20:30:43.2855871Z code_api|client.drx-scattergather 2025-10-14T20:30:43.2856117Z code_api|client.drx-scattergather-bbdup 2025-10-14T20:30:43.2856437Z code_api|sample.memval_simple_scattergather 2025-10-14T20:30:43.2856927Z code_api|tool.drcachesim.scattergather-x86

The error seems to be:

ERROR: gather result does not match

Logs: https://github.com/DynamoRIO/dynamorio/actions/runs/18508849493/attempts/1

Succeeded on a retry.

Oct 14 '25 21:10 abhinav92003

Happened in a PR with output mismatch on the same set of scattergather tests:

https://github.com/DynamoRIO/dynamorio/actions/runs/18603374767/job/53046989454?pr=7686

====> FAILURE in debug-internal-64 <====
	code_api|client.drx-scattergather 
	code_api|client.drx-scattergather-bbdup 
	code_api|sample.memval_simple_scattergather 
	code_api|tool.drcachesim.scattergather-x86

Oct 17 '25 20:10 derekbruening

Same output mismatch happened in x86-32 (https://github.com/DynamoRIO/dynamorio/actions/runs/18724532585/job/53405532740?pr=7691)

====> FAILURE in debug-internal-32 <====
code_api|client.drx-scattergather 
code_api|client.drx-scattergather-bbdup 
code_api|sample.memval_simple_scattergather 
code_api|tool.drcachesim.scattergather-x86

Oct 22 '25 22:10 edeiana

Happened again x86-64: https://github.com/DynamoRIO/dynamorio/actions/runs/18912885658/job/53988260379?pr=7700

Oct 29 '25 17:10 derekbruening

Happened on x86-32: https://github.com/DynamoRIO/dynamorio/actions/runs/19878728699/job/56971949068 Master merge: https://github.com/DynamoRIO/dynamorio/commit/0caf3965ad9c3099e18568a387d9c4a2d4b63d9f

Dec 03 '25 01:12 edeiana