Assertion violation: undefined `relativeSpecifiers` on `Object.getModuleSpecifiers`

[DanielRosenwasser]

From @dlannoye:

dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:91576
                    ts.Debug.checkDefined(relativeSpecifiers);
                             ^
Error: Debug Failure.
    at Object.getModuleSpecifiers (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:91576:30)
    at getSpecifierForModuleSymbol (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39998:62)
    at dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39874:39
    at Array.map (<anonymous>)
    at getSymbolChain (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39872:58)
    at lookupSymbolChainWorker (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39858:51)
    at lookupSymbolChain (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39852:24)
    at symbolToTypeNode (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:40005:29)
    at typeToTypeNodeHelper (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39150:28)
    at mapToTypeNodes (dependencies_path\typescript@4.2.1-rc\node_modules\typescript\lib\tsc.js:39671:40)

[btakita]

I'm getting a similar error:

/patheu/typescript/lib/tsc.js:91587
                    ts.Debug.checkDefined(relativeSpecifiers);
                             ^
Error: Debug Failure.
    at Object.getModuleSpecifiers (/path/node_modules/typescript/lib/tsc.js:91587:30)
    at getSpecifierForModuleSymbol (/path/node_modules/typescript/lib/tsc.js:39998:62)
    at /path/node_modules/typescript/lib/tsc.js:39874:39
    at Array.map (<anonymous>)
    at getSymbolChain (/path/node_modules/typescript/lib/tsc.js:39872:58)
    at lookupSymbolChainWorker (/path/node_modules/typescript/lib/tsc.js:39858:51)
    at lookupSymbolChain (/path/node_modules/typescript/lib/tsc.js:39852:24)
    at symbolToTypeNode (/path/node_modules/typescript/lib/tsc.js:40005:29)
    at typeReferenceToTypeNode (/path/node_modules/typescript/lib/tsc.js:39463:40)
    at typeToTypeNodeHelper (/path/node_modules/typescript/lib/tsc.js:39155:95)

[btakita]

This seems to be related to type inference; as the solution to this crash is to explicitly declare the type of a const though I'm not able to reproduce the exact cause.

[07akioni]

This seems to be related to type inference; as the solution to this crash is to explicitly declare the type of a const though I'm not able to reproduce the exact cause.

I'm facing the same problem (only in ts 4.2):

...
// got error
export const SsrContext = defineComponent({
...

// pass
export const SsrContext: ReturnType<typeof defineComponent> = defineComponent({
...

[flybayer]

I'm having the same error, and I have a small reproduction repo: https://github.com/flybayer/tsc-broken (boilerplate for a new Blitz app)

1. git clone git@github.com:flybayer/tsc-broken.git
2. cd tsc-broken
3. yarn
4. yarn tsc

Related: #42773

[dlannoye]

For my projects that were reproducing this I tracked it back to a regression introduced by #42095 .

I was able to get my projects building without the crash by reverting a single line in the PR that was doing extra filtering on the return of forEachFileNameOfModule in src/compiler/moduleSpecifiers.ts.

I am not sure if this is a complete fix and how it might interact with the desired behavior introduced by #42095.

[dylanvorster]

have had to rollback to "typescript": "^4.1.5",. @dlannoye any chance you can open a PR?

[andrewbranch]

@flybayer I can’t reproduce with your repo. I get a few checker errors but no crash:

❯ yarn tsc
yarn run v1.22.4
$ /System/Volumes/Data/Developer/microsoft/eg/tsc-broken/node_modules/.bin/tsc
app/auth/mutations/forgotPassword.test.ts:12:3 - error TS2698: Spread types may only be created from object types.

12   ...jest.requireActual("blitz")!,
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

db/index.ts:2:10 - error TS2305: Module '"@prisma/client"' has no exported member 'PrismaClient'.

2 import { PrismaClient } from "@prisma/client"
           ~~~~~~~~~~~~

types.ts:3:10 - error TS2614: Module '"db"' has no exported member 'User'. Did you mean to use 'import User from "db"' instead?

3 import { User } from "db"
           ~~~~


Found 3 errors.

error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

@dlannoye (or actually anyone else who has seen this error), are you using pnpm or some other system that puts modules in a hidden folder (starting with .) inside node_modules? The line you reverted to fix your problem is supposed to filter out invalid module specifiers, and the crash means you were left with no valid module specifiers after the filtering. But if you’re not using pnpm, I’m very confused as to what was getting filtered out in the first place. If anyone can provide a small reproduction of this bug, that would be very helpful.

[flybayer]

@andrewbranch run yarn blitz prisma generate to fix those type errors, and then tsc should crash. That prisma command is supposed to run automatically. It generates code and typedefs at node_modules/.prisma.