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tests/cases/compiler/typePredicateInLoop.ts(17,11): error TS1345: An expression of type 'void' cannot be tested for truthiness
==== tests/cases/compiler/typePredicateInLoop.ts (1 errors) ====
// Repro from #12101
interface Type {
type: number;
}
interface TypeExt extends Type {
arr: Type[];
}
const guard = (arg: Type): arg is TypeExt => arg.type === 1;
const otherFunc = (arg1: Type, arg2: TypeExt): void => {};
export function y(arg: Type): void {
if (guard(arg)) {
for (const ITEM of arg.arr) {
if (otherFunc(ITEM, arg)) {
~~~~~~~~~~~~~~~~~~~~
!!! error TS1345: An expression of type 'void' cannot be tested for truthiness
}
}
}
}
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