tool.drcacheoff.burst_replaceall failure on Windows with 2nd thread in simulator results

[derekbruening]

Looks like we expect one thread, but two are running. Is it one of the Windows pool threads? Why is it only showing up on this one run?

https://github.com/DynamoRIO/dynamorio/runs/5502017781?check_suite_focus=true

238: Running postcmd |D:/a/dynamorio/dynamorio/build_debug-internal-64/clients/bin64/drcachesim.exe;-indir;D:/a/dynamorio/dynamorio/build_debug-internal-64/suite/tests/drmemtrace.tool.drcacheoff.burst_replaceall.exe.02076.9096.dir|
238: CMake Error at D:/a/dynamorio/dynamorio/suite/tests/runmulti.cmake:130 (message):
238:   output |replace all file functions
238: 
238:   pre-DR init
238: 
238:   pre-DR start
238: 
238:   pre-DR detach
238: 
238:   processing 15 buffers
238: 
238:   creating module file
238:   .\drmemtrace.tool.drcacheoff.burst_replaceall.exe.02076.9096.dir\raw\modules.log
238: 
238: 
238:   all done
238: 
238:   Cache simulation results:
238: 
238:   Core #0 (1 thread(s))
238: 
238:     L1I stats:
238:       Hits:                          212,510
238:       Misses:                            251
238:       Compulsory misses:                 251
238:       Invalidations:                       0
238:       Miss rate:                        0.12%
238:     L1D stats:
238:       Hits:                           78,521
238:       Misses:                             62
238:       Compulsory misses:                 100
238:       Invalidations:                       0
238:       Prefetch hits:                      24
238:       Prefetch misses:                    38
238:       Miss rate:                        0.08%
238: 
238:   Core #1 (1 thread(s))
238: 
238:     L1I stats:
238:       Hits:                            2,577
238:       Misses:                            168
238:       Compulsory misses:                 168
238:       Invalidations:                       0
238:       Miss rate:                        6.12%
238:     L1D stats:
238:       Hits:                            1,094
238:       Misses:                             98
238:       Compulsory misses:                 172
238:       Invalidations:                       0
238:       Prefetch hits:                      24
238:       Prefetch misses:                    74
238:       Miss rate:                        8.22%
238: 
238:   Core #2 (0 thread(s))
238: 
238:   Core #3 (0 thread(s))
238: 
238:   LL stats:
238: 
238:       Hits:                                3
238:       Misses:                            576
238:       Compulsory misses:                 686
238:       Invalidations:                       0
238:       Prefetch hits:                       2
238:       Prefetch misses:                   110
238:       Local miss rate:                 99.48%
238:       Child hits:                    294,750
238:       Total miss rate:                  0.20%
238: 
238:   | failed to match expected output |replace all file functions
238: 
238:   pre-DR init
238: 
238:   pre-DR start
238: 
238:   pre-DR detach
238: 
238:   processing [0-9]* buffers
238: 
238:   creating module file .*
238: 
238:   all done
238: 
238:   Cache simulation results:
238: 
238:   Core #0 \(1 thread\(s\)\)
238: 
238:     L1I stats:
238:       Hits:                         *[0-9,\.]*
238:       Misses:                       *[0-9,\.]*
238:       Compulsory misses:            *[0-9,\.]*
238:       Invalidations:                *0
238: 
238:   .* Miss rate: [0-3][,\.]..%
238: 
238:     L1D stats:
238:       Hits:                         *[0-9,\.]*
238:       Misses:                       *[0-9,\.]*
238:       Compulsory misses:            *[0-9,\.]*
238:       Invalidations:                *0
238: 
238:   .* Miss rate: [0-3][,\.]..%
238: 
238:   Core #1 \(0 thread\(s\)\)
238: 
238:   Core #2 \(0 thread\(s\)\)
238: 
238:   Core #3 \(0 thread\(s\)\)
238: 
238:   LL stats:
238: 
238:       Hits:                         *[0-9,\.]*
238:       Misses:                       *[0-9,\.]*
238:       Compulsory misses:            *[0-9,\.]*
238:       Invalidations:                *0
238: 
238:   .* Local miss rate: *[0-9,.]*%
238: 
238:       Child hits:                   *[0-9,\.]*
238:       Total miss rate:                  [0-1][,\.]..%
238: 
238:   |
238: 
238: 
237/274 Test #238: code_api|tool.drcacheoff.burst_replaceall ....................***Failed    2.44 sec

[xdje42]

Sigh. Why does is:issue is:open burst_traceopts find #6423,
but is:issue is:open burst_replaceall find no bugs (back up the clock to before #6523 was filed) ???
I wouldn't have filed 6523 otherwise ...