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patch 9.1.0002: a closing fold expr, may start a new fold

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Problem:  a closing fold expression may unexpectedly start a new fold
          when it should end a fold
          (reported by Shota Nozaki)
Solution: if a fold hasn't started yet, do not immediately
          start a new fold with level 1
          (Shota Nozaki)

fixes: #12768
closes: #13748

Signed-off-by: Shota Nozaki <emonkak@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Shota Nozaki
2024-01-03 19:18:43 +01:00
committed by Christian Brabandt
parent bf44b69d1f
commit 0689b87059
3 changed files with 18 additions and 1 deletions
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4
src/fold.c
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@@ -3362,7 +3362,9 @@ foldlevelExpr(fline_T *flp)
break;
// "<1", "<2", .. : end a fold with a certain level
case '<': flp->lvl_next = n - 1;
case '<': // To prevent an unexpected start of a new fold, the next
// level must not exceed the level of the current fold.
flp->lvl_next = MIN(flp->lvl, n - 1);
flp->end = n;
break;