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Fixed source-map passed to istanbul-lib-instrument not being a plain object #10

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Fixed source-map passed to istanbul-lib-instrument not being a plain object #10

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8 changes: 7 additions & 1 deletion src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,13 @@ export default function(this: loader.LoaderContext, source: string, sourceMap?:

// Instrument the code
let instrumenter = createInstrumenter(options);
instrumenter.instrument(source, this.resourcePath, done.bind(this), sourceMap);
if (sourceMap !== undefined) {
const { ...sourceMapPlainObject } = sourceMap;
instrumenter.instrument(source, this.resourcePath, done.bind(this), sourceMapPlainObject);
}
else {
instrumenter.instrument(source, this.resourcePath, done.bind(this), undefined);
}

function done(this: loader.LoaderContext, error: Error | null, instrumentedSource: string) {
// Get the source map for the instrumented code
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