From 75b4cc13a0894ae8d06b78eb0aa7ed25340b61e2 Mon Sep 17 00:00:00 2001
From: Linus Groh <mail@linusgroh.de>
Date: Fri, 5 Jun 2020 14:28:53 +0100
Subject: [PATCH] LibCrypto: Fix to_base10() for zero-value BigIntegers

All the magic is happening in a "while != 0" loop, so we ended up with
an empty string for zero-value BigIntegers. Now we just check that
upfront and return early.
---
 Libraries/LibCrypto/BigInt/UnsignedBigInteger.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Libraries/LibCrypto/BigInt/UnsignedBigInteger.cpp b/Libraries/LibCrypto/BigInt/UnsignedBigInteger.cpp
index 81367f12503..60676fc9b66 100644
--- a/Libraries/LibCrypto/BigInt/UnsignedBigInteger.cpp
+++ b/Libraries/LibCrypto/BigInt/UnsignedBigInteger.cpp
@@ -80,6 +80,9 @@ UnsignedBigInteger UnsignedBigInteger::from_base10(const String& str)
 
 String UnsignedBigInteger::to_base10() const
 {
+    if (*this == UnsignedBigInteger { 0 })
+        return "0";
+
     StringBuilder builder;
     UnsignedBigInteger temp(*this);
     UnsignedBigInteger quotient;