From 2fa314a89da5e23dea24d0825d1161d76828a4c0 Mon Sep 17 00:00:00 2001
From: SirOlaf <34164198+SirOlaf@users.noreply.github.com>
Date: Thu, 10 Aug 2023 07:56:09 +0200
Subject: [PATCH] Fix #21760 (#22422)

* Remove call-specific replaceTypeVarsN

* Run for all call kinds and ignore typedesc

* Testcase

---------

Co-authored-by: SirOlaf <>
(cherry picked from commit baf350493b08d5e1ee25f61b7d7eff33c3499487)
---
 compiler/seminst.nim      | 4 ++--
 tests/generics/t21760.nim | 8 ++++++++
 2 files changed, 10 insertions(+), 2 deletions(-)
 create mode 100644 tests/generics/t21760.nim

diff --git a/compiler/seminst.nim b/compiler/seminst.nim
index 5b0fe6ba25..8d50a1c37e 100644
--- a/compiler/seminst.nim
+++ b/compiler/seminst.nim
@@ -272,9 +272,9 @@ proc instantiateProcType(c: PContext, pt: TIdTable,
     # call head symbol, because this leads to infinite recursion.
     if oldParam.ast != nil:
       var def = oldParam.ast.copyTree
-      if def.kind == nkCall:
+      if def.kind in nkCallKinds:
         for i in 1..<def.len:
-          def[i] = replaceTypeVarsN(cl, def[i])
+          def[i] = replaceTypeVarsN(cl, def[i], 1)
 
       def = semExprWithType(c, def)
       if def.referencesAnotherParam(getCurrOwner(c)):
diff --git a/tests/generics/t21760.nim b/tests/generics/t21760.nim
new file mode 100644
index 0000000000..5343279bb3
--- /dev/null
+++ b/tests/generics/t21760.nim
@@ -0,0 +1,8 @@
+import std/tables
+
+type Url = object
+
+proc myInit(_: type[Url], params = default(Table[string, string])): Url =
+  discard
+
+discard myInit(Url)
\ No newline at end of file