From 91518511a79ad2f2d227baba7d45a68acb19a9af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1s=20Gr=C3=BCner?=
 <47506558+MegaRedHand@users.noreply.github.com>
Date: Thu, 7 Nov 2024 16:59:29 -0300
Subject: [PATCH] fix: set length to unknown if set to -1

---
 progressbar.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/progressbar.go b/progressbar.go
index 251e583..b994d6d 100644
--- a/progressbar.go
+++ b/progressbar.go
@@ -849,7 +849,11 @@ func (p *ProgressBar) ChangeMax64(newMax int64) {
 			p.config.useIECUnits)
 	}
 
-	p.lengthKnown(newMax)
+	if newMax == -1 {
+		p.lengthUnknown()
+	} else {
+		p.lengthKnown(newMax)
+	}
 	p.lock.Unlock() // so p.Add can lock
 
 	p.Add(0) // re-render