From c88f58948a81975d2f37b3a233eeaaafbd07ef38 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Thu, 4 May 2023 16:42:04 +0200
Subject: [PATCH] fixes #21780 [backport:1.6] (#21785)

* fixes #21780 [backport:1.6]

* complete patch

(cherry picked from commit 79ac242c7206b71ff1ea8ea8d1e499c610a1403f)
---
 lib/system/seqs_v2.nim | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/system/seqs_v2.nim b/lib/system/seqs_v2.nim
index 0c487b31d6..e12dada750 100644
--- a/lib/system/seqs_v2.nim
+++ b/lib/system/seqs_v2.nim
@@ -89,7 +89,7 @@ proc grow*[T](x: var seq[T]; newLen: Natural; value: T) =
   #sysAssert newLen >= x.len, "invalid newLen parameter for 'grow'"
   if newLen <= oldLen: return
   var xu = cast[ptr NimSeqV2[T]](addr x)
-  if xu.p == nil or xu.p.cap < newLen:
+  if xu.p == nil or (xu.p.cap and not strlitFlag) < newLen:
     xu.p = cast[typeof(xu.p)](prepareSeqAdd(oldLen, xu.p, newLen - oldLen, sizeof(T), alignof(T)))
   xu.len = newLen
   for i in oldLen .. newLen-1:
@@ -104,7 +104,7 @@ proc add*[T](x: var seq[T]; value: sink T) {.magic: "AppendSeqElem", noSideEffec
   ## respected.
   let oldLen = x.len
   var xu = cast[ptr NimSeqV2[T]](addr x)
-  if xu.p == nil or xu.p.cap < oldLen+1:
+  if xu.p == nil or (xu.p.cap and not strlitFlag) < oldLen+1:
     xu.p = cast[typeof(xu.p)](prepareSeqAdd(oldLen, xu.p, 1, sizeof(T), alignof(T)))
   xu.len = oldLen+1
   # .nodestroy means `xu.p.data[oldLen] = value` is compiled into a
@@ -121,7 +121,7 @@ proc setLen[T](s: var seq[T], newlen: Natural) =
       let oldLen = s.len
       if newlen <= oldLen: return
       var xu = cast[ptr NimSeqV2[T]](addr s)
-      if xu.p == nil or xu.p.cap < newlen:
+      if xu.p == nil or (xu.p.cap and not strlitFlag) < newlen:
         xu.p = cast[typeof(xu.p)](prepareSeqAdd(oldLen, xu.p, newlen - oldLen, sizeof(T), alignof(T)))
       xu.len = newlen