declare-missing-class-properties fails with error in @babel/parser

[amitbeck]

The error:

Error: [declare-missing-class-properties][<some app>/dist/scripts.ae37101bcfd3368a0703.ts] Error:
 SyntaxError: Identifier '_typeof' has already been declared. (20915:9)
    at Object._raise (node_modules/@babel/parser/lib/index.js:541:17)
    at Object.raiseWithData (node_modules/@babel/parser/lib/index.js:534:17)
    at Object.raise (node_modules/@babel/parser/lib/index.js:495:17)
    at TypeScriptScopeHandler.checkRedeclarationInScope (node_modules/@babel/parser/lib/index.js:1688:12)
    at TypeScriptScopeHandler.declareName (node_modules/@babel/parser/lib/index.js:1654:12)
    at TypeScriptScopeHandler.declareName (node_modules/@babel/parser/lib/index.js:7565:11)
    at Object.registerFunctionStatementId (node_modules/@babel/parser/lib/index.js:14100:16)
    at Object.registerFunctionStatementId (node_modules/@babel/parser/lib/index.js:9292:13)
    at Object.parseFunction (node_modules/@babel/parser/lib/index.js:14080:12)
    at Object.parseFunctionStatement (node_modules/@babel/parser/lib/index.js:13709:17) {
  loc: Position { line: 20915, column: 9 },
  pos: 2017488,
  code: 'BABEL_PARSER_SYNTAX_ERROR',
  reasonCode: 'VarRedeclaration'
}