diff --git a/compiler/linter.nim b/compiler/linter.nim
index a80c377e95..b8358f5de9 100644
--- a/compiler/linter.nim
+++ b/compiler/linter.nim
@@ -12,7 +12,7 @@
 import std/strutils
 from std/sugar import dup
 
-import options, ast, msgs, idents, lineinfos, wordrecg, astmsgs, semdata, packages
+import options, ast, msgs, idents, lineinfos, wordrecg, astmsgs, semdata, packages, modulegraphs
 export packages
 
 const
@@ -97,7 +97,7 @@ template styleCheckDef*(ctx: PContext; info: TLineInfo; sym: PSym; k: TSymKind)
   if optStyleCheck in ctx.config.options and # ignore if styleChecks are off
      {optStyleHint, optStyleError} * ctx.config.globalOptions != {} and # check only if hint/error is enabled
      hintName in ctx.config.notes and # ignore if name checks are not requested
-     ctx.config.belongsToProjectPackage(sym) and # ignore foreign packages
+     ctx.config.belongsToProjectPackageMaybeNil(getModule(ctx.graph, info.fileIndex)) and # ignore foreign packages
      optStyleUsages notin ctx.config.globalOptions and # ignore if requested to only check name usage
      sym.kind != skResult and # ignore `result`
      sym.kind != skTemp and # ignore temporary variables created by the compiler
@@ -138,7 +138,7 @@ template styleCheckUse*(ctx: PContext; info: TLineInfo; sym: PSym) =
   ## Check symbol uses match their definition's style.
   if {optStyleHint, optStyleError} * ctx.config.globalOptions != {} and # ignore if styleChecks are off
      hintName in ctx.config.notes and # ignore if name checks are not requested
-     ctx.config.belongsToProjectPackage(sym) and # ignore foreign packages
+     ctx.config.belongsToProjectPackageMaybeNil(getModule(ctx.graph, info.fileIndex)) and # ignore foreign packages
      sym.kind != skTemp and # ignore temporary variables created by the compiler
      sym.name.s[0] in Letters and # ignore operators TODO: what about unicode symbols???
      sfAnon notin sym.flags: # ignore temporary variables created by the compiler
@@ -154,5 +154,5 @@ template checkPragmaUse*(ctx: PContext; info: TLineInfo; w: TSpecialWord; pragma
   ## Note: This only applies to builtin pragmas, not user pragmas.
   if {optStyleHint, optStyleError} * ctx.config.globalOptions != {} and # ignore if styleChecks are off
      hintName in ctx.config.notes and # ignore if name checks are not requested
-     (sym != nil and ctx.config.belongsToProjectPackage(sym)): # ignore foreign packages
+     ctx.config.belongsToProjectPackageMaybeNil(getModule(ctx.graph, info.fileIndex)): # ignore foreign packages
     checkPragmaUseImpl(ctx.config, info, w, pragmaName)
diff --git a/compiler/packages.nim b/compiler/packages.nim
index bb54d61546..63879acd26 100644
--- a/compiler/packages.nim
+++ b/compiler/packages.nim
@@ -51,3 +51,11 @@ func belongsToProjectPackage*(conf: ConfigRef, sym: PSym): bool =
   ## See Also:
   ## * `modulegraphs.belongsToStdlib`
   conf.mainPackageId == sym.getPackageId
+
+func belongsToProjectPackageMaybeNil*(conf: ConfigRef, sym: PSym): bool =
+  ## Return whether the symbol belongs to the project's package.
+  ## Returns `false` if `sym` is nil.
+  ##
+  ## See Also:
+  ## * `modulegraphs.belongsToStdlib`
+  sym != nil and conf.mainPackageId == sym.getPackageId
diff --git a/tests/stdlib/tdeques.nim b/tests/stdlib/tdeques.nim
index 39ff996d11..b8eca55e96 100644
--- a/tests/stdlib/tdeques.nim
+++ b/tests/stdlib/tdeques.nim
@@ -224,7 +224,7 @@ proc main() =
 
     block:
       var a, b = initDeque[int]()
-      for i in countDown(100, 1):
+      for i in countdown(100, 1):
         a.addFirst(i)
       for i in 1..100:
         b.addLast(i)
diff --git a/tests/stylecheck/tforeign_package.nim b/tests/stylecheck/tforeign_package.nim
index 8594ad802e..eb55851398 100644
--- a/tests/stylecheck/tforeign_package.nim
+++ b/tests/stylecheck/tforeign_package.nim
@@ -13,4 +13,13 @@ import foreign_package/foreign_package
 #     - user pragma usage violations
 #   - definition violations in foreign packages are ignored
 #   - usage violations in foreign packages are ignored
-genericProc[int]()
+generic_proc[int]()
+# issue #24269, stdlib:
+proc c(_: openArray[int]) = discard
+static:
+  doAssert compiles(generic_proc[int]())
+  doAssert not compiles(genericProc[int]())
+  doAssert not (compiles do:
+    proc c(_: openarray[int]) = discard)
+  doAssert (compiles do:
+    proc d(_: openArray[int]) = discard)