Fixed #18838 (#18841) [backport]

2021-09-13 01:35:19 -06:00 · 2021-09-13 01:35:19 -06:00 · 3f3e0fa303
commit 3f3e0fa303
parent 5d1608c976
2 changed files with 40 additions and 2 deletions
--- a/compiler/semtypinst.nim
+++ b/compiler/semtypinst.nim
@ -344,7 +344,11 @@ proc handleGenericInvocation(cl: var TReplTypeVars, t: PType): PType =
      x = lookupTypeVar(cl, x)
      if x != nil:
        if header == t: header = instCopyType(cl, t)
-        header[i] = x
+        header[i] =
+          if x.kind == tyGenericInst:
+            t[i]
+          else:
+            x
        propagateToOwner(header, x)
    else:
      propagateToOwner(header, x)