fixes #24167; {.push deprecated.} for templates (#24170)

fixes #24167

(cherry picked from commit 3b85c1a2e9)

compiler/ast.nim

@@ -1258,8 +1258,11 @@ proc getDeclPragma*(n: PNode): PNode =
 
 proc extractPragma*(s: PSym): PNode =
   ## gets the pragma node of routine/type/var/let/const symbol `s`
-  if s.kind in routineKinds:
-    result = s.ast[pragmasPos]
+  if s.kind in routineKinds: # bug #24167
+    if s.ast[pragmasPos] != nil and s.ast[pragmasPos].kind != nkEmpty:
+      result = s.ast[pragmasPos]
+    else:
+      result = nil
   elif s.kind in {skType, skVar, skLet, skConst}:
     if s.ast != nil and s.ast.len > 0:
       if s.ast[0].kind == nkPragmaExpr and s.ast[0].len > 1:

tests/pragmas/tpush.nim

@@ -64,3 +64,9 @@ foo31()
 foo41()
 
 {.pop.}
+
+block:
+  {.push deprecated.}
+  template test() = discard
+  test()
+  {.pop.}