loadSupergraphSdlFromStorage throws TS2869

[qumberrizvi]

Issue Description

Node version: v22.14.0 (lts/jod)
pnpm version: 10.6.4

While building the application, I encounter the following error:

TS2869: Right operand of ?? is unreachable because the left operand is never nullish.

The error is throw in the following file in gateway-js:
supergraphManagers/UplinkSupergraphManager/loadSupergraphSdlFromStorage.ts

At line 163:

throw new UplinkFetcherError(fetchErrorMsg + result.status + ' ' + e.message ?? e);

Possible solution

Change the line to as follows (notice the parenthesis):

throw new UplinkFetcherError(fetchErrorMsg + result.status + ' ' + (e.message ?? e));

or as follows:

throw new UplinkFetcherError(`${fetchErrorMsg} ${result.status}  ${e.message ?? e}`);

Link to Reproduction

https://github.com/qumberrizvi/escrow-backend

Reproduction Steps

Install dependencies:

pnpm install

Start microservices:

pnpm start:dev:ms