tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(3,5): error TS2532: Object is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(4,5): error TS18048: 'matchResult.index' is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(5,5): error TS18048: 'matchResult.input' is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(6,5): error TS18048: 'matchResult.groups' is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(6,5): error TS2532: Object is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(7,5): error TS2412: Type 'undefined' is not assignable to type '{ [key: string]: string; }' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the type of the target.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(10,5): error TS2532: Object is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(13,5): error TS18048: 'execResult.groups' is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(13,5): error TS2532: Object is possibly 'undefined'.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(14,5): error TS2412: Type 'undefined' is not assignable to type '{ [key: string]: string; }' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the type of the target.
tests/cases/compiler/regexpExecAndMatchTypeUsages.ts(20,9): error TS2375: Type 'RegExpMatchArray' is not assignable to type 'RegExpExecArray' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the types of the target's properties.
  Property 'index' is optional in type 'RegExpMatchArray' but required in type 'RegExpExecArray'.


==== tests/cases/compiler/regexpExecAndMatchTypeUsages.ts (11 errors) ====
    export function foo(matchResult: RegExpMatchArray, execResult: RegExpExecArray) {
        matchResult[0].length;
        matchResult[999].length;
        ~~~~~~~~~~~~~~~~
!!! error TS2532: Object is possibly 'undefined'.
        matchResult.index + 0;
        ~~~~~~~~~~~~~~~~~
!!! error TS18048: 'matchResult.index' is possibly 'undefined'.
        matchResult.input.length;
        ~~~~~~~~~~~~~~~~~
!!! error TS18048: 'matchResult.input' is possibly 'undefined'.
        matchResult.groups["someVariable"].length;
        ~~~~~~~~~~~~~~~~~~
!!! error TS18048: 'matchResult.groups' is possibly 'undefined'.
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! error TS2532: Object is possibly 'undefined'.
        matchResult.groups = undefined;
        ~~~~~~~~~~~~~~~~~~
!!! error TS2412: Type 'undefined' is not assignable to type '{ [key: string]: string; }' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the type of the target.
    
        execResult[0].length;
        execResult[999].length;
        ~~~~~~~~~~~~~~~
!!! error TS2532: Object is possibly 'undefined'.
        execResult.index + 0;
        execResult.input.length;
        execResult.groups["someVariable"].length;
        ~~~~~~~~~~~~~~~~~
!!! error TS18048: 'execResult.groups' is possibly 'undefined'.
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! error TS2532: Object is possibly 'undefined'.
        execResult.groups = undefined;
        ~~~~~~~~~~~~~~~~~
!!! error TS2412: Type 'undefined' is not assignable to type '{ [key: string]: string; }' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the type of the target.
    
        if (Math.random()) {
            matchResult = execResult;
        }
        else {
            execResult = matchResult
            ~~~~~~~~~~
!!! error TS2375: Type 'RegExpMatchArray' is not assignable to type 'RegExpExecArray' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the types of the target's properties.
!!! error TS2375:   Property 'index' is optional in type 'RegExpMatchArray' but required in type 'RegExpExecArray'.
        }
    }