add tests for recently closed issues (#10722)

tests/template/tmethodcall.nim

@@ -0,0 +1,24 @@
+# bug #5909
+type
+  Vec2[T] = tuple
+    x,y: T
+  Vec2f = Vec2[float32]
+
+proc vec2f(x,y: float): Vec2f =
+  result.x = x
+  result.y = y
+
+proc `-`[T](a,b: Vec2[T]): Vec2[T] =
+  result.x = a.x - b.x
+  result.y = a.y - b.y
+
+proc foo[T](a: Vec2[T]): Vec2[T] =
+  result = a
+
+block:
+ # this being called foo is a problem when calling .foo()
+  var foo = true
+
+  let a = vec2f(1.0,0.0)
+  let b = vec2f(3.0,1.0)
+  let c = (a - b).foo() # breaks