Adding regression test

Author: ahejlsberg

tests/baselines/reference/cyclicGenericTypeInstantiation.js

@@ -0,0 +1,37 @@
+//// [cyclicGenericTypeInstantiation.ts]
+function foo<T>() {
+    var z = foo<typeof y>();
+    var y: {
+        y2: typeof z
+    };
+    return y;
+}
+
+
+function bar<T>() {
+    var z = bar<typeof y>();
+    var y: {
+        y2: typeof z;
+    }
+    return y;
+}
+
+var a = foo<number>();
+var b = bar<number>();
+a = b;
+
+
+//// [cyclicGenericTypeInstantiation.js]
+function foo() {
+    var z = foo();
+    var y;
+    return y;
+}
+function bar() {
+    var z = bar();
+    var y;
+    return y;
+}
+var a = foo();
+var b = bar();
+a = b;

tests/baselines/reference/cyclicGenericTypeInstantiation.symbols

@@ -0,0 +1,55 @@
+=== tests/cases/compiler/cyclicGenericTypeInstantiation.ts ===
+function foo<T>() {
+>foo : Symbol(foo, Decl(cyclicGenericTypeInstantiation.ts, 0, 0))
+>T : Symbol(T, Decl(cyclicGenericTypeInstantiation.ts, 0, 13))
+
+    var z = foo<typeof y>();
+>z : Symbol(z, Decl(cyclicGenericTypeInstantiation.ts, 1, 7))
+>foo : Symbol(foo, Decl(cyclicGenericTypeInstantiation.ts, 0, 0))
+>y : Symbol(y, Decl(cyclicGenericTypeInstantiation.ts, 2, 7))
+
+    var y: {
+>y : Symbol(y, Decl(cyclicGenericTypeInstantiation.ts, 2, 7))
+
+        y2: typeof z
+>y2 : Symbol(y2, Decl(cyclicGenericTypeInstantiation.ts, 2, 12))
+>z : Symbol(z, Decl(cyclicGenericTypeInstantiation.ts, 1, 7))
+
+    };
+    return y;
+>y : Symbol(y, Decl(cyclicGenericTypeInstantiation.ts, 2, 7))
+}
+
+
+function bar<T>() {
+>bar : Symbol(bar, Decl(cyclicGenericTypeInstantiation.ts, 6, 1))
+>T : Symbol(T, Decl(cyclicGenericTypeInstantiation.ts, 9, 13))
+
+    var z = bar<typeof y>();
+>z : Symbol(z, Decl(cyclicGenericTypeInstantiation.ts, 10, 7))
+>bar : Symbol(bar, Decl(cyclicGenericTypeInstantiation.ts, 6, 1))
+>y : Symbol(y, Decl(cyclicGenericTypeInstantiation.ts, 11, 7))
+
+    var y: {
+>y : Symbol(y, Decl(cyclicGenericTypeInstantiation.ts, 11, 7))
+
+        y2: typeof z;
+>y2 : Symbol(y2, Decl(cyclicGenericTypeInstantiation.ts, 11, 12))
+>z : Symbol(z, Decl(cyclicGenericTypeInstantiation.ts, 10, 7))
+    }
+    return y;
+>y : Symbol(y, Decl(cyclicGenericTypeInstantiation.ts, 11, 7))
+}
+
+var a = foo<number>();
+>a : Symbol(a, Decl(cyclicGenericTypeInstantiation.ts, 17, 3))
+>foo : Symbol(foo, Decl(cyclicGenericTypeInstantiation.ts, 0, 0))
+
+var b = bar<number>();
+>b : Symbol(b, Decl(cyclicGenericTypeInstantiation.ts, 18, 3))
+>bar : Symbol(bar, Decl(cyclicGenericTypeInstantiation.ts, 6, 1))
+
+a = b;
+>a : Symbol(a, Decl(cyclicGenericTypeInstantiation.ts, 17, 3))
+>b : Symbol(b, Decl(cyclicGenericTypeInstantiation.ts, 18, 3))
+

tests/baselines/reference/cyclicGenericTypeInstantiation.types

@@ -0,0 +1,60 @@
+=== tests/cases/compiler/cyclicGenericTypeInstantiation.ts ===
+function foo<T>() {
+>foo : <T>() => { y2: any; }
+>T : T
+
+    var z = foo<typeof y>();
+>z : { y2: any; }
+>foo<typeof y>() : { y2: any; }
+>foo : <T>() => { y2: any; }
+>y : { y2: any; }
+
+    var y: {
+>y : { y2: any; }
+
+        y2: typeof z
+>y2 : { y2: any; }
+>z : { y2: any; }
+
+    };
+    return y;
+>y : { y2: any; }
+}
+
+
+function bar<T>() {
+>bar : <T>() => { y2: any; }
+>T : T
+
+    var z = bar<typeof y>();
+>z : { y2: any; }
+>bar<typeof y>() : { y2: any; }
+>bar : <T>() => { y2: any; }
+>y : { y2: any; }
+
+    var y: {
+>y : { y2: any; }
+
+        y2: typeof z;
+>y2 : { y2: any; }
+>z : { y2: any; }
+    }
+    return y;
+>y : { y2: any; }
+}
+
+var a = foo<number>();
+>a : { y2: any; }
+>foo<number>() : { y2: any; }
+>foo : <T>() => { y2: any; }
+
+var b = bar<number>();
+>b : { y2: any; }
+>bar<number>() : { y2: any; }
+>bar : <T>() => { y2: any; }
+
+a = b;
+>a = b : { y2: any; }
+>a : { y2: any; }
+>b : { y2: any; }
+

tests/cases/compiler/cyclicGenericTypeInstantiation.ts

@@ -0,0 +1,20 @@
+function foo<T>() {
+    var z = foo<typeof y>();
+    var y: {
+        y2: typeof z
+    };
+    return y;
+}
+
+
+function bar<T>() {
+    var z = bar<typeof y>();
+    var y: {
+        y2: typeof z;
+    }
+    return y;
+}
+
+var a = foo<number>();
+var b = bar<number>();
+a = b;