fixes #23295; don't expand constants for complex structures

compiler/trees.nim

@@ -226,8 +226,7 @@ proc stupidStmtListExpr*(n: PNode): bool =
 proc dontInlineConstant*(orig, cnst: PNode): bool {.inline.} =
   # symbols that expand to a complex constant (array, etc.) should not be
   # inlined, unless it's the empty array:
-  result = orig.kind != cnst.kind and
-           cnst.kind in {nkCurly, nkPar, nkTupleConstr, nkBracket, nkObjConstr} and
+  result = cnst.kind in {nkCurly, nkPar, nkTupleConstr, nkBracket, nkObjConstr} and
            cnst.len > ord(cnst.kind == nkObjConstr)
 
 proc isRunnableExamples*(n: PNode): bool =

tests/objvariant/tconstobjvariant.nim

@@ -0,0 +1,18 @@
+# This is a sample code, the first echo statement prints out the error
+type
+  A = object
+    case w: uint8
+    of 1:
+      n: int
+    else:
+      other: string
+
+const
+  a = A(w: 1, n: 5)
+
+proc foo =
+
+  let c = [a]
+  doAssert c[0].n == 5
+
+foo()