fix getExtendedConfig in commandLineParser#27139
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* remove invalid assertion * fix invalid array spread on possibly undefined value * only add unique files to extendedSourceFiles, preventing the array from growing infinitely
sheetalkamat
approved these changes
Sep 17, 2018
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Pushing to
extendedSourceFilesunconditionally causes it to grow larger accumulating duplicates on each call toparseJsonSourceFileConfigFileContent. This happens if you callts.createPrograma lot withprojectReferences(where one of themextendsanother config) and a host that caches TsConfigSourceFiles.