Qt Creator не может начать отладку на Mac

Недавно (я подозреваю какое-то системное/доморощенное обновление) перестал работать отладчик Qt. Он висит навсегда на Setting up inferior...

Внутренний журнал:

dStart parameters: 'QGIS' mode: 1
dABI: x86-darwin-generic-mach_o-64bit
dLanguages: c++ 
dExecutable: ./QGIS 
dDirectory: ./build/output/bin/QGIS.app/Contents/MacOS
dDebugger: /Library/Developer/CommandLineTools/usr/bin/lldb
dProject: ./QGIS
dAdditional Search Directories:
dSysroot: 
dDebug Source Location: 
dDebugger settings:
dAdditionalArguments:   (default: )
dAdjustBreakpointLocations: true  (default: true)
dAllPluginBreakpoints: true  (default: true)
dAlwaysAdjustColumnWidths: true  (default: true)
dAutoDerefPointers: true  (default: true)
dAutoEnrichParameters: true  (default: true)
dAutoQuit: false  (default: false)
dBreakEvent:   (default: )
dBreakOnAbort: false  (default: false)
dBreakOnCatch: false  (default: false)
dBreakOnCrtDbgReport: false  (default: false)
dBreakOnFatal: false  (default: false)
dBreakOnThrow: false  (default: false)
dBreakOnWarning: false  (default: false)
dBreakpointCorrection: true  (default: true)
dBreakpointsFullPath: false  (default: false)
dCDB_Console: false  (default: false)
dCloseBuffersOnExit: false  (default: false)
dCloseMemoryBuffersOnExit: true  (default: true)
dDisplayStringLimit: 100  (default: 100)
dEnableReverseDebugging: false  (default: false)
dExtraDumperFile:   (default: )
dFirstChanceExceptionTaskEntry: true  (default: true)
dFontSizeFollowsEditor: false  (default: false)
dGdbCustomDumperCommands:   (default: )
dGdbPostAttachCommands:   (default: )
dGdbStartupCommands:   (default: )
dIdentifyDebugInfoPackages: false  (default: false)
dIgnoreFirstChanceAccessViolation: false  (default: false)
dIntelFlavor: false  (default: false)
dLoadGdbDumpers2: false  (default: false)
dLoadGdbInit: true  (default: true)
dLogTimeStamps: false  (default: false)
dMaximalStackDepth: 20  (default: 20)
dMaximalStringLength: 10000  (default: 10000)
dMultiInferior: false  (default: false)
dNoPluginBreakpoints: false  (default: false)
dQmlInspector.ShowAppOnTop: false  (default: false)
dRaiseOnInterrupt: true  (default: true)
dSecondChanceExceptionTaskEntry: true  (default: true)
dSelectedPluginBreakpoints: false  (default: false)
dSelectedPluginBreakpointsPattern: .*  (default: .*)
dShowQObjectNames2: true  (default: true)
dShowQmlObjectTree: true  (default: true)
dShowQtNamespace: true  (default: true)
dShowStandardNamespace: true  (default: true)
dShowThreadNames: false  (default: false)
dSkipKnownFrames: false  (default: false)
dSortStructMembers: true  (default: true)
dSourcePaths:   (default: )
dStationaryEditorWhileStepping: false  (default: false)
dSwitchModeOnExit: false  (default: false)
dSymbolPaths:   (default: )
dTargetAsync: false  (default: false)
dUseAddressInBreakpointsView: false  (default: false)
dUseAddressInStackView: false  (default: false)
dUseAlternatingRowColours: false  (default: false)
dUseCodeModel: true  (default: true)
dUseDebuggingHelper: true  (default: true)
dUseDynamicType: true  (default: true)
dUseMessageBoxForSignals: true  (default: true)
dUsePythonDumper: true  (default: true)
dUseToolTips: true  (default: true)
dUseToolTipsInBreakpointsView: false  (default: false)
dUseToolTipsInLocalsView: false  (default: false)
dUseToolTipsInStackView: true  (default: true)
dWarnOnReleaseBuilds: true  (default: true)
dWatchdogTimeout: 20  (default: 20)
dState changed from DebuggerNotReady(0) to EngineSetupRequested(1)
dCALL: SETUP ENGINE
dSTARTING LLDB: /Library/Developer/CommandLineTools/usr/bin/lldb
 Setting up inferior...
<1loadDumpers({"token":1})
<2setupInferior({"attachpid":0,"breakonmain":0,<environment suppressed>,"executable":"/Users/peter/Projects/qgis3/build-QGIS-Qt_5_12_3_5_12_3-Debug/output/bin/QGIS.app/Contents/MacOS/QGIS","nativemixed":0,"platform":"","processargs":"","remotechannel":"","startmode":1,"sysroot":"","token":2,"useterminal":0,"workingdirectory":"./output/bin/QGIS.app/Contents/MacOS"})

eERROR: Lldb stderr: error: there is no embedded script interpreter in this mode.
eerror: there is no embedded script interpreter in this mode.
eERROR: Lldb stderr: error: there is no embedded script interpreter in this mode.
eerror: there is no embedded script interpreter in this mode.

>(lldb) script sys.path.insert(1, '/Applications/Qt Creator.app/Contents/Resources/debugger/')
>(lldb) script from lldbbridge import *
>(lldb) script theDumper.loadDumpers({"token":1})
>(lldb) script theDumper.setupInferior({"attachpid":0,"breakonmain":0,"environment":["4170706c655f5075625375625f536f636b65745f52656e6465723d2f707269766174652f746d702f636f6d2e6170706c652e6c61756e6368642e523977366371596a6d642f52656e646572","434c49434f4c4f523d31","444953504c41593d2f707269766174652f746d702f636f6d2e6170706c652e6c61756e6368642e734648496356415574732f6f72672e6d61636f73666f7267652e7871756172747a3a30","484f4d453d2f55736572732f7065746572","484f4d45425245575f43433d636c616e67","484f4d45425245575f4358583d636c616e672b2b","484f4d45425245575f4e4f5f4155544f5f5550444154453d31","4c414e473d656e5f55532e5554462d38","4c435f414c4c3d656e5f55532e5554462d38","4c435f43545950453d5554462d38","4c4f474e414d453d7065746572","4f4c445057443d2f55736572732f70657465722f50726f6a656374732f71676973332f51474953","504154483d2f7573722f6c6f63616c2f7362696e3a2f7573722f6c6f63616c2f62696e3a2f7573722f62696e3a2f62696e3a2f7573722f7362696e3a2f7362696e3a2f4c6962726172792f5465582f74657862696e3a2f6f70742f5831312f62696e","5053313d5c5b5c655b33326d5c5d5c755c5b5c655b6d5c5d5c5b5c655b33326d5c5d405c5b5c655b6d5c5d5c5b5c655b33326d5c5d5c685c5b5c655b6d5c5d3a5c5b5c655b33346d5c5d5c775c5b5c655b6d5c5d5c2420","51544449523d2f7573722f6c6f63616c2f43656c6c61722f71742f352e31322e33","534543555249545953455353494f4e49443d3138366138","5348454c4c3d2f62696e2f62617368","53484c564c3d31","5353485f415554485f534f434b3d2f707269766174652f746d702f636f6d2e6170706c652e6c61756e6368642e7836626d74703371524a2f4c697374656e657273","5445524d3d787465726d2d323536636f6c6f72","5445524d5f50524f4752414d3d4170706c655f5465726d696e616c","5445524d5f50524f4752414d5f56455253494f4e3d3432312e32","5445524d5f53455353494f4e5f49443d34434644433031342d393731392d344437442d394132382d344637413739354235453632","544d504449523d2f7661722f666f6c646572732f395f2f316e747a31736778317167666c6b32707973686e74726d7230303030676e2f542f","555345523d7065746572","5850435f464c4147533d307830","5850435f534552564943455f4e414d453d6f72672e71742d70726f6a6563742e717463726561746f722e3435343736","5f3d2f7573722f62696e2f6f70656e","5f5f43465f555345525f544558545f454e434f44494e473d30783146353a3078303a307830"],"executable":"/Users/peter/Projects/qgis3/build-QGIS-Qt_5_12_3_5_12_3-Debug/output/bin/QGIS.app/Contents/MacOS/QGIS","nativemixed":0,"platform":"","processargs":"","remotechannel":"","startmode":1,"sysroot":"","token":2,"useterminal":0,"workingdirectory":"/Users/peter/Projects/qgis3/build-QGIS-Qt_5_12_3_5_12_3-Debug/output/bin/QGIS.app/Contents/MacOS"})

соответствующая ошибка, вероятно:

ERROR: Lldb stderr: error: there is no embedded script interpreter in this mode.

У меня lldb-1100.0.25.3, MacOS 10.14.5, Qt Creator 4.9.0 (на основе Qt 5.12.2 (Clang 10.0 (Apple), 64 бит))