fixes #5170 (#13589)

* fixes #5170

* make tests green

tests/types/tissues_types.nim

@@ -8,6 +8,8 @@ ptr Foo
 (member: 123.456)
 (member: "hello world", x: ...)
 (member: 123.456, x: ...)
+0
+false
 '''
 joinable: false
 """
@@ -78,3 +80,31 @@ block t7905:
 
   foobarRec("hello world")
   foobarRec(123.456'f64)
+
+# bug #5170
+
+when true:
+  type Foo = object
+    bar: bool
+
+  type Bar = object
+    sameBody: string
+
+  var b0: Bar
+  b0.sameBody = "abc"
+
+block:
+  type Foo = object
+    baz: int
+
+  type Bar = object
+    sameBody: string
+
+  var b1: Bar
+  b1.sameBody = "def"
+
+  var f2: Foo
+  echo f2.baz
+
+var f1: Foo
+echo f1.bar