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							- diff --git a/build/lib/compilation.js b/build/lib/compilation.js
 
- index 2270e05..1bd7b90 100644
 
- --- a/build/lib/compilation.js
 
- +++ b/build/lib/compilation.js
 
- @@ -104,24 +104,3 @@ function compileTask(src, out, build, options = {}) {
 
-          }
 
- -        // mangle: TypeScript to TypeScript
 
- -        let mangleStream = es.through();
 
- -        if (build && !options.disableMangle) {
 
- -            let ts2tsMangler = new index_1.Mangler(compile.projectPath, (...data) => fancyLog(ansiColors.blue('[mangler]'), ...data), { mangleExports: true, manglePrivateFields: true });
 
- -            const newContentsByFileName = ts2tsMangler.computeNewFileContents(new Set(['saveState']));
 
- -            mangleStream = es.through(async function write(data) {
 
- -                const tsNormalPath = ts.normalizePath(data.path);
 
- -                const newContents = (await newContentsByFileName).get(tsNormalPath);
 
- -                if (newContents !== undefined) {
 
- -                    data.contents = Buffer.from(newContents.out);
 
- -                    data.sourceMap = newContents.sourceMap && JSON.parse(newContents.sourceMap);
 
- -                }
 
- -                this.push(data);
 
- -            }, async function end() {
 
- -                // free resources
 
- -                (await newContentsByFileName).clear();
 
- -                this.push(null);
 
- -                ts2tsMangler = undefined;
 
- -            });
 
- -        }
 
-          return srcPipe
 
- -            .pipe(mangleStream)
 
-              .pipe(generator.stream)
 
- diff --git a/build/lib/compilation.ts b/build/lib/compilation.ts
 
- index d5da3f1..fa46962 100644
 
- --- a/build/lib/compilation.ts
 
- +++ b/build/lib/compilation.ts
 
- @@ -123,27 +123,3 @@ export function compileTask(src: string, out: string, build: boolean, options: {
 
-  
 
- -		// mangle: TypeScript to TypeScript
 
- -		let mangleStream = es.through();
 
- -		if (build && !options.disableMangle) {
 
- -			let ts2tsMangler = new Mangler(compile.projectPath, (...data) => fancyLog(ansiColors.blue('[mangler]'), ...data), { mangleExports: true, manglePrivateFields: true });
 
- -			const newContentsByFileName = ts2tsMangler.computeNewFileContents(new Set(['saveState']));
 
- -			mangleStream = es.through(async function write(data: File & { sourceMap?: RawSourceMap }) {
 
- -				type TypeScriptExt = typeof ts & { normalizePath(path: string): string };
 
- -				const tsNormalPath = (<TypeScriptExt>ts).normalizePath(data.path);
 
- -				const newContents = (await newContentsByFileName).get(tsNormalPath);
 
- -				if (newContents !== undefined) {
 
- -					data.contents = Buffer.from(newContents.out);
 
- -					data.sourceMap = newContents.sourceMap && JSON.parse(newContents.sourceMap);
 
- -				}
 
- -				this.push(data);
 
- -			}, async function end() {
 
- -				// free resources
 
- -				(await newContentsByFileName).clear();
 
- -
 
- -				this.push(null);
 
- -				(<any>ts2tsMangler) = undefined;
 
- -			});
 
- -		}
 
- -
 
-  		return srcPipe
 
- -			.pipe(mangleStream)
 
-  			.pipe(generator.stream)
 
 
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