Fix #10073 (#10218)

compiler/semexprs.nim

@@ -1043,7 +1043,8 @@ proc semSym(c: PContext, n: PNode, sym: PSym, flags: TExprFlags): PNode =
   of skConst:
     markUsed(c.config, n.info, s, c.graph.usageSym)
     onUse(n.info, s)
-    case skipTypes(s.typ, abstractInst-{tyTypeDesc}).kind
+    let typ = skipTypes(s.typ, abstractInst-{tyTypeDesc})
+    case typ.kind
     of  tyNil, tyChar, tyInt..tyInt64, tyFloat..tyFloat128,
         tyTuple, tySet, tyUInt..tyUInt64:
       if s.magic == mNone: result = inlineConst(c, n, s)
@@ -1061,6 +1062,12 @@ proc semSym(c: PContext, n: PNode, sym: PSym, flags: TExprFlags): PNode =
       # deal with two different ``[]``.
       if s.ast.len == 0: result = inlineConst(c, n, s)
       else: result = newSymNode(s, n.info)
+    of tyStatic:
+      if typ.n != nil:
+        result = typ.n
+        result.typ = typ.base
+      else:
+        result = newSymNode(s, n.info)
     else:
       result = newSymNode(s, n.info)
   of skMacro:

tests/statictypes/tstatictypes.nim

@@ -116,3 +116,19 @@ block:
     Tensor[B: static[Backend]; T] = object
 
     BackProp[B: static[Backend],T] = proc (gradient: Tensor[B,T]): Tensor[B,T]
+
+# https://github.com/nim-lang/Nim/issues/10073
+block:
+  proc foo[N: static int](x: var int,
+                          y: int,
+                          z: static int,
+                          arr: array[N, int]): auto =
+    var t1 = (a: x, b: y, c: z, d: N)
+    var t2 = (x, y, z, N)
+    doAssert t1 == t2
+    result = t1
+
+  var y = 20
+  var x = foo(y, 10, 15, [1, 2, 3])
+  doAssert x == (20, 10, 15, 3)
+