investigate flaky test-inspector-debug-end on AIX

[Trott]

https://ci.nodejs.org/job/node-test-commit-aix/19716/nodes=aix61-ppc64/console

test-osuosl-aix61-ppc64_be-1

09:58:13 not ok 2436 sequential/test-inspector-debug-end
09:58:13   ---
09:58:13   duration_ms: 1.178
09:58:13   severity: fail
09:58:13   exitcode: 1
09:58:13   stack: |-
09:58:13     Test there's no crash stopping server that was not started
09:58:13     { AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:
09:58:13     
09:58:13     42 !== null
09:58:13     
09:58:13         at testNoServerNoCrash (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/sequential/test-inspector-debug-end.js:13:3)
09:58:13         at process.internalTickCallback (internal/process/next_tick.js:77:7)
09:58:13       generatedMessage: true,
09:58:13       name: 'AssertionError [ERR_ASSERTION]',
09:58:13       code: 'ERR_ASSERTION',
09:58:13       actual: 42,
09:58:13       expected: null,
09:58:13       operator: 'strictEqual' }
09:58:13     1
09:58:13   ...

[Trott]

Still happening (recent example below) but infrequently enough that I won't mark it flaky yet, especially because I'm optimistic it will be fixed by whatever combination of things addresses #25007.

test-osuosl-aix61-ppc64_be-1

https://ci.nodejs.org/job/node-test-commit-aix/19840/nodes=aix61-ppc64/console

04:32:59 not ok 2443 sequential/test-inspector-debug-end
04:32:59   ---
04:32:59   duration_ms: 1.200
04:32:59   severity: fail
04:32:59   exitcode: 1
04:32:59   stack: |-
04:32:59     Test there's no crash stopping server that was not started
04:32:59     { AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:
04:32:59     
04:32:59     42 !== null
04:32:59     
04:32:59         at testNoServerNoCrash (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/sequential/test-inspector-debug-end.js:13:3)
04:32:59         at process.internalTickCallback (internal/process/next_tick.js:77:7)
04:32:59       generatedMessage: true,
04:32:59       name: 'AssertionError [ERR_ASSERTION]',
04:32:59       code: 'ERR_ASSERTION',
04:32:59       actual: 42,
04:32:59       expected: null,
04:32:59       operator: 'strictEqual' }
04:32:59     1
04:32:59   ...

[gireeshpunathil]

got a core file today.

(dbx) where
.() at 0x0
array-buffer-collector._ZN2v88internal20CancelableLambdaTaskIZNS0_20ArrayBufferCollector15FreeAllocationsEvEUlvE_E11RunInternalEv(??) at 0x1011caca4
cancelable-task.LTHUNK..0(??) at 0x100039304
node_platform._ZN4node12_GLOBAL__N_1L20PlatformWorkerThreadEPv(??) at 0x1001e6970
(dbx) ($link-4)/i
0x1011caca4 (_ZN2v88internal20CancelableLambdaTaskIZNS0_20ArrayBufferCollector15FreeAllocationsEvEUlvE_E11RunInternalEv+0x36c) 4e800421       bctrl
(dbx) x
  $r0:0x00000001011cac10  $stkp:0x00000001102b2480   $toc:0x0000000000000000  
  $r3:0x000000011023e9b0    $r4:0x0000000101f78220    $r5:0x0000000000ee1e7e  
  $r6:0x0037710155f3a70b    $r7:0x000000000000007d    $r8:0x000000000000007d  
  $r9:0x0000000000000000   $r10:0x0000000000000000   $r11:0x0000000000000000  
 $r12:0x09001000a0082b60   $r13:0x00000001102ba800   $r14:0x0000000000000000  
 $r15:0x0000000000000000   $r16:0x0000000000000000   $r17:0x0000000000000000  
 $r18:0x0000000000000000   $r19:0x0000000000000000   $r20:0x0000000000000000  
 $r21:0x0000000000000000   $r22:0x0000000000000000   $r23:0x0000000000000000  
 $r24:0x0000000000000000   $r25:0x000000011023f300   $r26:0x0000000000000000  
 $r27:0x000000011023ff50   $r28:0x00000001101fb220   $r29:0x0000000110420790  
 $r30:0x0000000000000000   $r31:0x00000001102b2480  
 $iar:0x0000000000000000   $msr:0xa00000000000d032    $cr:0x42000228  
$link:0x00000001011caca8   $ctr:0x0000000000000000   $xer:0x40000000  
(dbx) 

So it is clearly a wild branch that we saw in #24921 . Resolving #25007 should be the way forward. I will submit one to mark this flaky.

[gireeshpunathil]

the test is active for the last one week with no failures, so as expected #25061 has fixed the underlying issue. Closing.