Error: Debug Failure. False expression. in 'ProjectService.applyChangesInOpenFiles' during 'updateOpen'

[typescript-bot]

This issue comes from crash dumps in telemetry. We've tried to de-duplicate issues on a best-effort basis, comparing the sequence of methods called and the command requested while ignoring line numbers.
TypeScript version prefix: 3.7.2
VSCode version: 1.40.0
Command requested: updateOpen
Hitting sessions: 999
Five line hash: 4d92d6402109da29bcae978b166e587c
Stack:

    at ProjectService.applyChangesInOpenFiles (tsserver.js:138343:34)
    at _a.<computed> (tsserver.js:139212:46)
    at <anonymous> (tsserver.js:140870:88)
    at Session.executeWithRequestId (tsserver.js:140861:28)
    at Session.executeCommand (tsserver.js:140870:33)
    at Session.onMessage (tsserver.js:140893:35)
    at <anonymous> (tsserver.js:142208:27)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)
    at unknown (suppressed.js)

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.3
VSCode version: 1.41.0-insider
Command requested: updateOpen
Hitting sessions: 383
Five line hash: ca3bd85aefb68326dd9676e80f0b27e5
Stack:

Error: Debug Failure. False expression: Script should not exist and not be open already
    at ProjectService.applyChangesInOpenFiles (tsserver.js:138377:34)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139259:46)
    at unknown (tsserver.js:140917:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140908:28)
    at IOSession.Session.executeCommand (tsserver.js:140917:33)
    at IOSession.Session.onMessage (tsserver.js:140940:35)
    at Interface.<anonymous> (tsserver.js:142255:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.4
VSCode version: 1.40.2
Command requested: updateOpen
Hitting sessions: 123
Five line hash: ca3bd85aefb68326dd9676e80f0b27e5
Stack:

Error: Debug Failure. False expression: Script should not exist and not be open already
    at ProjectService.applyChangesInOpenFiles (tsserver.js:138392:34)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139274:46)
    at unknown (tsserver.js:140932:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140923:28)
    at IOSession.Session.executeCommand (tsserver.js:140932:33)
    at IOSession.Session.onMessage (tsserver.js:140955:35)
    at Interface.<anonymous> (tsserver.js:142270:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[typescript-bot]

This issue reproduced in the following context:
TypeScript version prefix: 3.7.5
VSCode version: 1.41.1
Command requested: updateOpen
Hitting sessions: 175
Five line hash: ca3bd85aefb68326dd9676e80f0b27e5
Stack:

Error: Debug Failure. False expression.
    at ProjectService.applyChangesInOpenFiles (tsserver.js:138433:34)
    at Session.handlers.ts.createMapFromTemplate._a.<computed> (tsserver.js:139302:46)
    at unknown (tsserver.js:140960:88)
    at IOSession.Session.executeWithRequestId (tsserver.js:140951:28)
    at IOSession.Session.executeCommand (tsserver.js:140960:33)
    at IOSession.Session.onMessage (tsserver.js:140983:35)
    at Interface.<anonymous> (tsserver.js:142298:27)
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()
    at suppressed_frame()

[mjbvz]

@RyanCavanaugh Marking as VS Code priority since this is the second from the top hitter in TS 3.8.2