NullPointerException during compilation of cocos2d application

[andrey-shikhov]

closure compiler v20191111
I tried to compile some cocos2d application into single js using closure compiler, but it crashed on cocos2d main script which is attached below
cocos2d-js-min.zip

to reproduce:
java -jar closure-compiler-v20191111.jar cocos2d-js-min.js

java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:877)
at com.google.javascript.jscomp.RemoveUnusedCode$ClassSetupCall.removeInternal(RemoveUnusedCode.java:2484)
at com.google.javascript.jscomp.RemoveUnusedCode$Removable.remove(RemoveUnusedCode.java:1622)
at com.google.javascript.jscomp.RemoveUnusedCode$VarInfo.removeAllRemovables(RemoveUnusedCode.java:2579)
at com.google.javascript.jscomp.RemoveUnusedCode.removeUnreferencedVarsAndPolyfills(RemoveUnusedCode.java:1532)
at com.google.javascript.jscomp.RemoveUnusedCode.traverseAndRemoveUnusedReferences(RemoveUnusedCode.java:272)
at com.google.javascript.jscomp.RemoveUnusedCode.process(RemoveUnusedCode.java:250)
at com.google.javascript.jscomp.PhaseOptimizer$NamedPass.process(PhaseOptimizer.java:317)
at com.google.javascript.jscomp.PhaseOptimizer$Loop.process(PhaseOptimizer.java:462)
at com.google.javascript.jscomp.PhaseOptimizer.process(PhaseOptimizer.java:232)
at com.google.javascript.jscomp.Compiler.performOptimizations(Compiler.java:2418)
at com.google.javascript.jscomp.Compiler.lambda$stage2Passes$1(Compiler.java:799)
at com.google.javascript.jscomp.CompilerExecutor$2.call(CompilerExecutor.java:102)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

[rishipal]

Created internal issue - http://b/145236516