tests/cases/compiler/extendGlobalThis2.ts(1,11): error TS2397: Declaration name conflicts with built-in global identifier 'globalThis'.


==== tests/cases/compiler/extendGlobalThis2.ts (1 errors) ====
    namespace globalThis {
              ~~~~~~~~~~
!!! error TS2397: Declaration name conflicts with built-in global identifier 'globalThis'.
        export function foo() { console.log("x"); }
    }