tests/cases/compiler/forInStatement7.ts(3,6): error TS2405: The left-hand side of a 'for...in' statement must be of type 'string' or 'any'. ==== tests/cases/compiler/forInStatement7.ts (1 errors) ==== var a: number; var expr: any; for (a in expr) { ~ !!! error TS2405: The left-hand side of a 'for...in' statement must be of type 'string' or 'any'. }