From ec6ef86219578822fd32bbe2e5eb83b24ddfdca6 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Fri, 1 May 2020 13:33:46 -0400
Subject: [PATCH] fix off-by-one error in sizeInBaseUpperBound

---
 lib/std/math/big/int.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/math/big/int.zig b/lib/std/math/big/int.zig
index 21f983c56f..8ee1474275 100644
--- a/lib/std/math/big/int.zig
+++ b/lib/std/math/big/int.zig
@@ -995,7 +995,7 @@ pub const Const = struct {
     /// TODO See if we can make this exact.
     pub fn sizeInBaseUpperBound(self: Const, base: usize) usize {
         const bit_count = @as(usize, @boolToInt(!self.positive)) + self.bitCountAbs();
-        return (bit_count / math.log2(base)) + 1;
+        return (bit_count / math.log2(base)) + 2;
     }
 
     pub const ConvertError = error{