TypeScript/tests/cases/compiler/typeComparisonCaching.ts

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// Check that we only cache results of type comparisons that are free of assumptions
interface A {
p: C;
s: string;
}
interface B {
p: D;
s: number;
}
interface C {
q: A;
}
interface D {
q: B;
}
var a: A;
var b: B;
var c: C;
var d: D;
a = b;
c = d; // Should not be allowed