Upgrading bl@6.0.10 to bl@6.0.12 creates issues

[danielpeintner]

We are running into an issue when upgrading from v6.0.10 to v6.0.12.

node_modules/bl/node_modules/@types/readable-stream/index.d.ts:355:9 - error TS2416: Property 'pipe' in type 'Duplex' is not assignable to the same property in base type '_Writable'.
  Type '<S extends _IWritable>(dest: S, pipeOpts?: { end?: boolean | undefined; } | undefined) => S' is not assignable to type '<T extends WritableStream>(destination: T, options?: { end?: boolean | undefined; } | undefined) => T'.
    Types of parameters 'dest' and 'destination' are incompatible.
      Type 'T' is not assignable to type '_IWritable'.
        Type 'WritableStream' is not assignable to type '_IWritable'.
          The types returned by 'end(...)' are incompatible between these types.
            Type 'void' is not assignable to type '_IWritable'.

355         pipe<S extends _IWritable>(dest: S, pipeOpts?: { end?: boolean | undefined }): S;
            ~~~~

node_modules/mqtt/node_modules/@types/readable-stream/index.d.ts:355:9 - error TS2416: Property 'pipe' in type 'Duplex' is not assignable to the same property in base type '_Writable'.
  Type '<S extends _IWritable>(dest: S, pipeOpts?: { end?: boolean | undefined; } | undefined) => S' is not assignable to type '<T extends WritableStream>(destination: T, options?: { end?: boolean | undefined; } | undefined) => T'.
    Types of parameters 'dest' and 'destination' are incompatible.
      Type 'T' is not assignable to type '_IWritable'.
        Type 'WritableStream' is not assignable to type '_IWritable'.
          The types returned by 'end(...)' are incompatible between these types.
            Type 'void' is not assignable to type '_IWritable'.

355         pipe<S extends _IWritable>(dest: S, pipeOpts?: { end?: boolean | undefined }): S;
            ~~~~

Do you have an idea what might cause this problem?

We noticed that with v6.0.12 it pulls in a new dependency @types/readable-stream@4.0.0 which causes the problems in our case.
Any helps or pointer is appreciated. Thanks!

see also eclipse-thingweb/node-wot#1292

[rvagg]

#133

@kyle-johnson are you able to help out with this one? I don't understand it at all and my instinct is to downgrade the types package to a devdep, but reviewing #133 suggests that's not appropriate.

perhaps it should just be upped to match the readable-stream semver since it's at ^4.0.0 and we're using ^4.2.0 readable-stream so there could be some too-loose reconciliation going on in a complex enough dependency tree.

The two conflicting packages are doing fairly similar things though: https://github.com/mqttjs/MQTT.js/blob/8d5936eda1ca90694f6ae6e95567d4065a8efda3/package.json#L111C13-L122 their readable-stream types allow lower than the actual readable-stream package.

🤷 maybe it's just time to bump both of them.

[danielpeintner]

FYI: the generated (and attached) package-lock.json has varying versions in it due do external dependencies.
Maybe there is a change between v2 and v4 that causes the issue/inconsistency?

see also eclipse-thingweb/node-wot#1292 (comment)

[danielpeintner]

FYI: It was an upstream issue with the type definitions we all are using.

@JKRhb from the thingweb team detected and fixed the problem, see DefinitelyTyped/DefinitelyTyped#69974 for more details.

Hence, I am closing the issue...

"@types/readable-stream": "4.0.15" contains the fix!