indexbg1.js failing because unable to run checks in parallel with index creation

 m30201| Mon Apr  9 01:04:24 [conn1] query test.jstests_index11 query: { query: { i: 100.0 }, $explain: true } ntoreturn:0 ntoskip:0 nscanned:16000000 keyUpdates:0 nreturned:1 reslen:330 139421ms

calling ensureIndex

null

assert failed

Error("Printing Stack Trace")@:0

()@src/mongo/shell/utils.js:37

("assert failed")@src/mongo/shell/utils.js:58

(null)@src/mongo/shell/utils.js:66

@/Users/erh/work/buildbot/OS_X_105_64bit_Weekly_Slow_Tests/mongo/jstests/slowWeekly/indexbg1.js:79

caught exception

but that's OK

indexing finished too soon, retrying...

assert failed : unable to run checks in parallel with index creation

Error("Printing Stack Trace")@:0

()@src/mongo/shell/utils.js:37

("assert failed : unable to run checks in parallel with index creation")@src/mongo/shell/utils.js:58

(false,"unable to run checks in parallel with index creation")@src/mongo/shell/utils.js:66

@/Users/erh/work/buildbot/OS_X_105_64bit_Weekly_Slow_Tests/mongo/jstests/slowWeekly/indexbg1.js:102

Mon Apr  9 01:04:25 uncaught exception: assert failed : unable to run checks in parallel with index creation

failed to load: /Users/erh/work/buildbot/OS_X_105_64bit_Weekly_Slow_Tests/mongo/jstests/slowWeekly/indexbg1.js