runsuite_wrapper failed to produce a final list of ignore-vs-new errors

**Describe the bug**

The following tests are failing with error "Required regular expression not found..." for PR https://github.com/DynamoRIO/dynamorio/pull/5371. Logs: https://github.com/DynamoRIO/dynamorio/runs/5239756194?check_suite_focus=true#logs

1. common.nativeexec
_`22/269 Test #22: code_api|common.nativeexec ...................................***Failed Required regular expression not found. Regex=[^Running under DR`_
2. win32.mixedmode_late
`62/269 Test #62: code_api|win32.mixedmode_late ................................***Failed Required regular expression not found. Regex=[^creating subprocess `
3. win32.mixedmode
`63/269 Test #63: code_api|win32.mixedmode .....................................***Failed Required regular expression not found. Regex=[^creating subprocess`
4. x86_to_x64
` 64/269 Test #64: code_api|win32.x86_to_x64 ....................................***Failed Required regular expression not found. Regex=[^creating subprocess `
5. win32.x86_to_x64_ibl_opt
`65/269 Test #65: code_api|win32.x86_to_x64_ibl_opt ............................***Failed Required regular expression not found. Regex=[^creating subprocess `
6. client.cleancall
`85/269 Test #84: code_api|client.cleancall ....................................***Failed Required regular expression not found. Regex=[^cleancall_aflags_save`
7. client.drmgr-test
`135/269 Test #133: code_api|client.drmgr-test ...................................***Failed Required regular expression not found. Regex=[^in `
8. client.drx-test
` 147/269 Test #144: code_api|client.drx-test .....................................***Failed Required regular expression not found. Regex=[^creating child #1`
9. client.drutil-test
`156/269 Test #154: code_api|client.drutil-test ..................................***Failed Required regular expression not found. Regex=[^About to create thread`
10. client.pcache-use
`157/269 Test #157: code_api|client.pcache-use ...................................***Failed Required regular expression not found. Regex=[^thank you for testing the client interface`

11. tool.drcpusim.cpuid-Presler
`254/269 Test #239: code_api|tool.drcpusim.cpuid-Presler .........................***Failed Required regular expression not found. Regex=[^Running on an Intel processor`
12. api.detach
`269/269 Test #255: code_api|api.detach ..........................................***Failed Required regular expression not found. Regex=[^all done: 150000 iters`