CODEWITHSUNDEEP
node.jscompressionzlib
Calladrus2k1
Calladrus2k1

Reputation: 104

Argument of type 'Buffer' is not assignable to parameter of type 'InputType'

My project has been using zlib for its decompression methods for a long time. Suddenly while trying to update packages its throwing a TypeError in the following code:

Argument of type 'Buffer' is not assignable to parameter of type 'InputType'.
  Type 'Buffer' is not assignable to type 'ArrayBuffer | Uint8Array<ArrayBufferLike> | DataView<ArrayBufferLike>'.
    Type 'Buffer' is not assignable to type 'Uint8Array<ArrayBufferLike>'.
      The types of 'slice(...).buffer' are incompatible between these types.
        Type 'ArrayBufferLike' is not assignable to type 'ArrayBuffer'.
          Type 'SharedArrayBuffer' is missing the following properties from type 'ArrayBuffer': resizable, resize, detached, transfer, transferToFixedLength

import { deflateSync, gzipSync } from 'zlib'

const getFile = () => {
    if (compression === 'gzip') {
      return gzipSync(Buffer.from(csv))    // Here
    } else if (compression === 'deflate') {
      return deflateSync(Buffer.from(csv))   // Here
    } else {
      return Buffer.from(csv)
    }
  }

zlib is a core node.js module and in my package.json there is no indication of either node or this lib to have been upgraded. So I am unsure of why this TypeError is getting thrown now. zlib hasnt been updated recently. Doing the following fixes this issue:

gzipSync(new Uint8Array(Buffer.from(csv)))

Since the code is only used in tests and the tests still work, I am only interested in knowing the root cause. Why did this error suddenly appear when seemingly nothing changed?

Upvotes: 0

Views: 145

Answers (0)

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