Compiler crash using new.target with --language_out ECMASCRIPT_2019

[AshleyScirra]

Tested with Closure Compiler v20200517

Command: java -jar closure-compiler.jar --js in.js --js_output_file out.js --language_out ECMASCRIPT_2019

in.js:

window.Class = class {
	constructor()
	{
		let newTarget = new.target;
		return Object.create(newTarget.prototype);
	}
};

This crashes with IllegalStateException (full stack omitted for brevity):

java.lang.IllegalStateException: Unexpected expression node: NEW_TARGET 4 [length: 10] [source_file: in.js]
 parent:NAME newTarget 4 [length: 22] [source_file: in.js] [constant_var_flags: 2]
        at com.google.javascript.jscomp.NodeUtil.evaluatesToLocalValue(NodeUtil.java:4754)
        at com.google.javascript.jscomp.RemoveUnusedCode$NameDeclarationStatement.isAssignedValueLocal(RemoveUnusedCode.java:2384)
        at com.google.javascript.jscomp.RemoveUnusedCode$VarInfo.addRemovable(RemoveUnusedCode.java:2670)
        at com.google.javascript.jscomp.RemoveUnusedCode.traverseDeclarationStatement(RemoveUnusedCode.java:1038)

Another seemingly related case is the following:

window.Class = class {
	constructor()
	{
		return new.target;
	}
};

This crashes too but only in ADVANCED compilation mode. Full command line:
java -jar closure-compiler.jar --js in.js --js_output_file out.js --language_out ECMASCRIPT_2019 --compilation_level ADVANCED

This crashes with INTERNAL COMPILER ERROR (full stack omitted for brevity):

in.js:4: WARNING - [JSC_TYPE_MISMATCH] inconsistent return type
found   : Function
required: window.Class
                return new.target;
                       ^^^^^^^^^^

0 error(s), 1 warning(s), 100.0% typed
java.lang.RuntimeException: INTERNAL COMPILER ERROR.
Please report this problem.

Unexpected expression node: NEW_TARGET 4 [length: 10] [source_file: in.js] : Function
 parent:RETURN 4 [length: 18] [source_file: in.js]
  Node(RETURN): in.js:4:2
                return new.target;
  Parent(BLOCK): in.js:3:1
        {

        at com.google.javascript.jscomp.NodeUtil.evaluatesToLocalValue(NodeUtil.java:4754)
        at com.google.javascript.jscomp.PureFunctionIdentifier$FunctionBodyAnalyzer.updateSideEffectsForNode(PureFunctionIdentifier.java:829)
        at com.google.javascript.jscomp.PureFunctionIdentifier$FunctionBodyAnalyzer.visit(PureFunctionIdentifier.java:709)
        at com.google.javascript.jscomp.NodeTraversal.traverseBranch(NodeTraversal.java:909)

[concavelenz]

The fix for this should be trivial, I put together a change