diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index d6db67d3fa..04071f5087 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11673,7 +11673,7 @@ namespace ts {
         function getInferredClassType(symbol: Symbol) {
             const links = getSymbolLinks(symbol);
             if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
+                links.inferredClassType = createAnonymousType(symbol, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
             }
             return links.inferredClassType;
         }
diff --git a/tests/baselines/reference/methodsReturningThis.js b/tests/baselines/reference/methodsReturningThis.js
new file mode 100644
index 0000000000..b0ebd84770
--- /dev/null
+++ b/tests/baselines/reference/methodsReturningThis.js
@@ -0,0 +1,36 @@
+//// [input.js]
+function Class()
+{
+}
+
+// error: 'Class' doesn't have property 'notPresent'
+Class.prototype.containsError = function () { return this.notPresent; };
+
+// lots of methods that return this, which caused out-of-memory in #9527
+Class.prototype.m1 = function (a, b, c, d, tx, ty) { return this; };
+Class.prototype.m2 = function (x, y) { return this; };
+Class.prototype.m3 = function (x, y) { return this; };
+Class.prototype.m4 = function (angle) { return this; };
+Class.prototype.m5 = function (matrix) { return this; };
+Class.prototype.m6 = function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; };
+Class.prototype.m7 = function(matrix) { return this; };
+Class.prototype.m8 = function() { return this; };
+Class.prototype.m9 = function () { return this; };
+
+
+
+//// [output.js]
+function Class() {
+}
+// error: 'Class' doesn't have property 'notPresent'
+Class.prototype.containsError = function () { return this.notPresent; };
+// lots of methods that return this, which caused out-of-memory in #9527
+Class.prototype.m1 = function (a, b, c, d, tx, ty) { return this; };
+Class.prototype.m2 = function (x, y) { return this; };
+Class.prototype.m3 = function (x, y) { return this; };
+Class.prototype.m4 = function (angle) { return this; };
+Class.prototype.m5 = function (matrix) { return this; };
+Class.prototype.m6 = function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; };
+Class.prototype.m7 = function (matrix) { return this; };
+Class.prototype.m8 = function () { return this; };
+Class.prototype.m9 = function () { return this; };
diff --git a/tests/baselines/reference/methodsReturningThis.symbols b/tests/baselines/reference/methodsReturningThis.symbols
new file mode 100644
index 0000000000..eccb1a64f8
--- /dev/null
+++ b/tests/baselines/reference/methodsReturningThis.symbols
@@ -0,0 +1,101 @@
+=== tests/cases/conformance/salsa/input.js ===
+function Class()
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+{
+}
+
+// error: 'Class' doesn't have property 'notPresent'
+Class.prototype.containsError = function () { return this.notPresent; };
+>Class.prototype : Symbol(Class.containsError, Decl(input.js, 2, 1))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>containsError : Symbol(Class.containsError, Decl(input.js, 2, 1))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+// lots of methods that return this, which caused out-of-memory in #9527
+Class.prototype.m1 = function (a, b, c, d, tx, ty) { return this; };
+>Class.prototype : Symbol(Class.m1, Decl(input.js, 5, 72))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m1 : Symbol(Class.m1, Decl(input.js, 5, 72))
+>a : Symbol(a, Decl(input.js, 8, 31))
+>b : Symbol(b, Decl(input.js, 8, 33))
+>c : Symbol(c, Decl(input.js, 8, 36))
+>d : Symbol(d, Decl(input.js, 8, 39))
+>tx : Symbol(tx, Decl(input.js, 8, 42))
+>ty : Symbol(ty, Decl(input.js, 8, 46))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m2 = function (x, y) { return this; };
+>Class.prototype : Symbol(Class.m2, Decl(input.js, 8, 68))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m2 : Symbol(Class.m2, Decl(input.js, 8, 68))
+>x : Symbol(x, Decl(input.js, 9, 31))
+>y : Symbol(y, Decl(input.js, 9, 33))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m3 = function (x, y) { return this; };
+>Class.prototype : Symbol(Class.m3, Decl(input.js, 9, 54))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m3 : Symbol(Class.m3, Decl(input.js, 9, 54))
+>x : Symbol(x, Decl(input.js, 10, 31))
+>y : Symbol(y, Decl(input.js, 10, 33))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m4 = function (angle) { return this; };
+>Class.prototype : Symbol(Class.m4, Decl(input.js, 10, 54))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m4 : Symbol(Class.m4, Decl(input.js, 10, 54))
+>angle : Symbol(angle, Decl(input.js, 11, 31))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m5 = function (matrix) { return this; };
+>Class.prototype : Symbol(Class.m5, Decl(input.js, 11, 55))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m5 : Symbol(Class.m5, Decl(input.js, 11, 55))
+>matrix : Symbol(matrix, Decl(input.js, 12, 31))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m6 = function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; };
+>Class.prototype : Symbol(Class.m6, Decl(input.js, 12, 56))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m6 : Symbol(Class.m6, Decl(input.js, 12, 56))
+>x : Symbol(x, Decl(input.js, 13, 31))
+>y : Symbol(y, Decl(input.js, 13, 33))
+>pivotX : Symbol(pivotX, Decl(input.js, 13, 36))
+>pivotY : Symbol(pivotY, Decl(input.js, 13, 44))
+>scaleX : Symbol(scaleX, Decl(input.js, 13, 52))
+>scaleY : Symbol(scaleY, Decl(input.js, 13, 60))
+>rotation : Symbol(rotation, Decl(input.js, 13, 68))
+>skewX : Symbol(skewX, Decl(input.js, 13, 78))
+>skewY : Symbol(skewY, Decl(input.js, 13, 85))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m7 = function(matrix) { return this; };
+>Class.prototype : Symbol(Class.m7, Decl(input.js, 13, 110))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m7 : Symbol(Class.m7, Decl(input.js, 13, 110))
+>matrix : Symbol(matrix, Decl(input.js, 14, 30))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m8 = function() { return this; };
+>Class.prototype : Symbol(Class.m8, Decl(input.js, 14, 55))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m8 : Symbol(Class.m8, Decl(input.js, 14, 55))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+Class.prototype.m9 = function () { return this; };
+>Class.prototype : Symbol(Class.m9, Decl(input.js, 15, 49))
+>Class : Symbol(Class, Decl(input.js, 0, 0))
+>prototype : Symbol(Function.prototype, Decl(lib.d.ts, --, --))
+>m9 : Symbol(Class.m9, Decl(input.js, 15, 49))
+>this : Symbol(Class, Decl(input.js, 0, 0))
+
+
diff --git a/tests/baselines/reference/methodsReturningThis.types b/tests/baselines/reference/methodsReturningThis.types
new file mode 100644
index 0000000000..5bcaa992a7
--- /dev/null
+++ b/tests/baselines/reference/methodsReturningThis.types
@@ -0,0 +1,133 @@
+=== tests/cases/conformance/salsa/input.js ===
+function Class()
+>Class : () => void
+{
+}
+
+// error: 'Class' doesn't have property 'notPresent'
+Class.prototype.containsError = function () { return this.notPresent; };
+>Class.prototype.containsError = function () { return this.notPresent; } : () => any
+>Class.prototype.containsError : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>containsError : any
+>function () { return this.notPresent; } : () => any
+>this.notPresent : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>notPresent : any
+
+// lots of methods that return this, which caused out-of-memory in #9527
+Class.prototype.m1 = function (a, b, c, d, tx, ty) { return this; };
+>Class.prototype.m1 = function (a, b, c, d, tx, ty) { return this; } : (a: any, b: any, c: any, d: any, tx: any, ty: any) => { containsError: () => any; m1: any; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m1 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m1 : any
+>function (a, b, c, d, tx, ty) { return this; } : (a: any, b: any, c: any, d: any, tx: any, ty: any) => { containsError: () => any; m1: any; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>a : any
+>b : any
+>c : any
+>d : any
+>tx : any
+>ty : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m2 = function (x, y) { return this; };
+>Class.prototype.m2 = function (x, y) { return this; } : (x: any, y: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: any; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m2 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m2 : any
+>function (x, y) { return this; } : (x: any, y: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: any; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>x : any
+>y : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m3 = function (x, y) { return this; };
+>Class.prototype.m3 = function (x, y) { return this; } : (x: any, y: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: any; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m3 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m3 : any
+>function (x, y) { return this; } : (x: any, y: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: any; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>x : any
+>y : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m4 = function (angle) { return this; };
+>Class.prototype.m4 = function (angle) { return this; } : (angle: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: any; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m4 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m4 : any
+>function (angle) { return this; } : (angle: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: any; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>angle : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m5 = function (matrix) { return this; };
+>Class.prototype.m5 = function (matrix) { return this; } : (matrix: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: any; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m5 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m5 : any
+>function (matrix) { return this; } : (matrix: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: any; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>matrix : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m6 = function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; };
+>Class.prototype.m6 = function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; } : (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: any; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m6 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m6 : any
+>function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; } : (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: any; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+>x : any
+>y : any
+>pivotX : any
+>pivotY : any
+>scaleX : any
+>scaleY : any
+>rotation : any
+>skewX : any
+>skewY : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m7 = function(matrix) { return this; };
+>Class.prototype.m7 = function(matrix) { return this; } : (matrix: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: any; m8: () => typeof Class; m9: () => typeof Class; }
+>Class.prototype.m7 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m7 : any
+>function(matrix) { return this; } : (matrix: any) => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: any; m8: () => typeof Class; m9: () => typeof Class; }
+>matrix : any
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m8 = function() { return this; };
+>Class.prototype.m8 = function() { return this; } : () => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: any; m9: () => typeof Class; }
+>Class.prototype.m8 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m8 : any
+>function() { return this; } : () => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: any; m9: () => typeof Class; }
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+Class.prototype.m9 = function () { return this; };
+>Class.prototype.m9 = function () { return this; } : () => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: any; }
+>Class.prototype.m9 : any
+>Class.prototype : any
+>Class : () => void
+>prototype : any
+>m9 : any
+>function () { return this; } : () => { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: any; }
+>this : { containsError: () => any; m1: (a: any, b: any, c: any, d: any, tx: any, ty: any) => typeof Class; m2: (x: any, y: any) => typeof Class; m3: (x: any, y: any) => typeof Class; m4: (angle: any) => typeof Class; m5: (matrix: any) => typeof Class; m6: (x: any, y: any, pivotX: any, pivotY: any, scaleX: any, scaleY: any, rotation: any, skewX: any, skewY: any) => typeof Class; m7: (matrix: any) => typeof Class; m8: () => typeof Class; m9: () => typeof Class; }
+
+
diff --git a/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.symbols b/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.symbols
index 5ea2756598..52fc8b9a9a 100644
--- a/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.symbols
+++ b/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.symbols
@@ -19,6 +19,8 @@ MyClass.prototype.optionalParam = function(required, notRequired) {
 >notRequired : Symbol(notRequired, Decl(jsDocOptionality.js, 8, 52))
 
     return this;
+>this : Symbol(MyClass, Decl(jsDocOptionality.js, 0, 0))
+
 };
 let pInst = new MyClass();
 >pInst : Symbol(pInst, Decl(jsDocOptionality.js, 11, 3))
diff --git a/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.types b/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.types
index 2dcaa37b94..48d44bb540 100644
--- a/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.types
+++ b/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.types
@@ -26,27 +26,27 @@ MyClass.prototype.optionalParam = function(required, notRequired) {
 >notRequired : string
 
     return this;
->this : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
+>this : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
 
 };
 let pInst = new MyClass();
->pInst : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
->new MyClass() : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
+>pInst : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
+>new MyClass() : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
 >MyClass : () => void
 
 let c1 = pInst.optionalParam('hello')
->c1 : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
->pInst.optionalParam('hello') : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
+>c1 : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
+>pInst.optionalParam('hello') : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
 >pInst.optionalParam : (required: string, notRequired?: string) => { prop: null; optionalParam: any; }
->pInst : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
+>pInst : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
 >optionalParam : (required: string, notRequired?: string) => { prop: null; optionalParam: any; }
 >'hello' : string
 
 let c2 = pInst.optionalParam('hello', null)
->c2 : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
->pInst.optionalParam('hello', null) : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
+>c2 : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
+>pInst.optionalParam('hello', null) : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
 >pInst.optionalParam : (required: string, notRequired?: string) => { prop: null; optionalParam: any; }
->pInst : { prop: null; optionalParam: (required: string, notRequired?: string) => { prop: null; optionalParam: any; }; }
+>pInst : { prop: null; optionalParam: (required: string, notRequired?: string) => typeof MyClass; }
 >optionalParam : (required: string, notRequired?: string) => { prop: null; optionalParam: any; }
 >'hello' : string
 >null : null
diff --git a/tests/cases/conformance/salsa/methodsReturningThis.ts b/tests/cases/conformance/salsa/methodsReturningThis.ts
new file mode 100644
index 0000000000..4c9f0d5cd0
--- /dev/null
+++ b/tests/cases/conformance/salsa/methodsReturningThis.ts
@@ -0,0 +1,21 @@
+// @filename: input.js
+// @out: output.js
+// @allowJs: true
+function Class()
+{
+}
+
+// error: 'Class' doesn't have property 'notPresent'
+Class.prototype.containsError = function () { return this.notPresent; };
+
+// lots of methods that return this, which caused out-of-memory in #9527
+Class.prototype.m1 = function (a, b, c, d, tx, ty) { return this; };
+Class.prototype.m2 = function (x, y) { return this; };
+Class.prototype.m3 = function (x, y) { return this; };
+Class.prototype.m4 = function (angle) { return this; };
+Class.prototype.m5 = function (matrix) { return this; };
+Class.prototype.m6 = function (x, y, pivotX, pivotY, scaleX, scaleY, rotation, skewX, skewY) { return this; };
+Class.prototype.m7 = function(matrix) { return this; };
+Class.prototype.m8 = function() { return this; };
+Class.prototype.m9 = function () { return this; };
+