initial test case for follow-on issue

tests/lang_callable/overload/tfoo.nim

@@ -0,0 +1,29 @@
+discard """
+"""
+
+import std/strformat
+
+echo fmt"{1}f"
+
+#[
+# attempting at creating a minimal failure case
+proc main(n: SomeNumber) =
+  when n is SomeUnsignedInt:
+    var v = n.uint64
+    let negative = false
+  else:
+    let n = n.int64
+    let negative = n < 0
+    var v =
+      if negative:
+        # `uint64(-n)`, but accounts for `n == low(int64)`
+        uint64(not n) + 1
+      else:
+        uint64(n)
+  
+  var w = typeof(v)(10)
+  
+  doAssert v == w
+
+main(10)
+]#