closes #16132 [backport] (#18880)

* closes #16132 [backport]

* fixes #16132 [backport]

compiler/semexprs.nim

@@ -1667,11 +1667,14 @@ proc takeImplicitAddr(c: PContext, n: PNode; isLent: bool): PNode =
 proc asgnToResultVar(c: PContext, n, le, ri: PNode) {.inline.} =
   if le.kind == nkHiddenDeref:
     var x = le[0]
-    if x.kind == nkSym and x.sym.kind == skResult and (x.typ.kind in {tyVar, tyLent} or classifyViewType(x.typ) != noView):
-      n[0] = x # 'result[]' --> 'result'
-      n[1] = takeImplicitAddr(c, ri, x.typ.kind == tyLent)
-      x.typ.flags.incl tfVarIsPtr
-      #echo x.info, " setting it for this type ", typeToString(x.typ), " ", n.info
+    if x.kind == nkSym:
+      if x.sym.kind == skResult and (x.typ.kind in {tyVar, tyLent} or classifyViewType(x.typ) != noView):
+        n[0] = x # 'result[]' --> 'result'
+        n[1] = takeImplicitAddr(c, ri, x.typ.kind == tyLent)
+        x.typ.flags.incl tfVarIsPtr
+        #echo x.info, " setting it for this type ", typeToString(x.typ), " ", n.info
+      elif sfGlobal in x.sym.flags:
+        x.typ.flags.incl tfVarIsPtr
 
 proc borrowCheck(c: PContext, n, le, ri: PNode) =
   const

tests/views/tviews1.nim

@@ -5,7 +5,8 @@ discard """
 3
 2
 3
-3'''
+3
+15'''
   targets: "c cpp"
 """
 
@@ -26,3 +27,14 @@ proc main(s: seq[int]) =
   take x
 
 main(@[11, 22, 33])
+
+var x: int
+
+proc foo(x: var int): var int =
+  once: x = 42
+  return x
+
+var y: var int = foo(x)
+y = 15
+echo foo(x)
+# bug #16132