fixes #19015 [backport:1.6] (#19204)

2021-12-04 07:42:58 +01:00 · 2021-12-04 07:42:58 +01:00 · d584dd5b99
commit d584dd5b99
parent 23c117a950
4 changed files with 10 additions and 2 deletions
--- a/compiler/options.nim
+++ b/compiler/options.nim
@ -207,7 +207,8 @@ type
    strictNotNil,
    overloadableEnums,
    strictEffects,
-    unicodeOperators
+    unicodeOperators,
+    flexibleOptionalParams

  LegacyFeature* = enum
    allowSemcheckedAstModification,
--- a/compiler/sigmatch.nim
+++ b/compiler/sigmatch.nim
@ -2461,7 +2461,8 @@ proc matchesAux(c: PContext, n, nOrig: PNode, m: var TCandidate, marker: var Int
        if m.callee.n[f].kind != nkSym:
          internalError(c.config, n[a].info, "matches")
          noMatch()
-        if a >= firstArgBlock: f = max(f, m.callee.n.len - (n.len - a))
+        if flexibleOptionalParams in c.features and a >= firstArgBlock:
+          f = max(f, m.callee.n.len - (n.len - a))
        formal = m.callee.n[f].sym
        m.firstMismatch.kind = kTypeMismatch
        if containsOrIncl(marker, formal.position) and container.isNil: