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=== tests/cases/compiler/inferenceOfNullableObjectTypesWithCommonBase.ts ===
function equal<T>(a: T, b: T) { }
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>T : Symbol(T, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 15))
>a : Symbol(a, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 18))
>T : Symbol(T, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 15))
>b : Symbol(b, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 23))
>T : Symbol(T, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 15))
let v = null!;
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
// Object types with common base types
type B = { foo: string }
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>foo : Symbol(foo, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 10))
type D = { foo: string; bar: number }
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
>foo : Symbol(foo, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 7, 10))
>bar : Symbol(bar, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 7, 23))
equal(v as B, v as undefined | D)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
equal(v as undefined | D, v as B)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
equal<undefined | B>(v as B, v as undefined | D)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
equal<undefined | B>(v as undefined | D, v as B)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
equal(v as B, v as undefined)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
equal(v as undefined, v as B)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
equal(v as B, v as D)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
equal(v as D, v as B)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>D : Symbol(D, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 6, 24))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
equal(v as B, v as B | undefined)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
equal(v as B | undefined, v as B)
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>B : Symbol(B, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 14))
equal(v as 'a' | undefined, v as 'b');
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
equal(v as 'a', v as 'b' | undefined);
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
equal(v as 'a' | undefined, v as 'b' | null);
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
equal(v as 'a' | null, v as 'b' | undefined);
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
equal(v as string, v as string & { tag: 'foo' } | undefined);
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>tag : Symbol(tag, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 30, 34))
equal(v as string & { tag: 'foo' } | undefined, v as string);
>equal : Symbol(equal, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 0, 0))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
>tag : Symbol(tag, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 31, 21))
>v : Symbol(v, Decl(inferenceOfNullableObjectTypesWithCommonBase.ts, 2, 3))
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