From c9d2fb326d7df6752712bbd780268e9c8d77876d Mon Sep 17 00:00:00 2001
From: Fedor <fedor@mail.ru>
Date: Tue, 12 Nov 2019 08:46:59 +0300
Subject: [PATCH] Adjust tokenization of U+0000.

---
 parser/html/nsHtml5Tokenizer.cpp | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/parser/html/nsHtml5Tokenizer.cpp b/parser/html/nsHtml5Tokenizer.cpp
index 4c815b0c0..5464d211d 100644
--- a/parser/html/nsHtml5Tokenizer.cpp
+++ b/parser/html/nsHtml5Tokenizer.cpp
@@ -1054,9 +1054,6 @@ nsHtml5Tokenizer::stateLoop(int32_t state, char16_t c, int32_t pos, char16_t* bu
           }
           c = checkChar(buf, pos);
           switch(c) {
-            case '\0': {
-              NS_HTML5_BREAK(stateloop);
-            }
             case '-': {
               clearStrBufAfterOneHyphen();
               state = P::transition(mViewSource, NS_HTML5TOKENIZER_COMMENT_START, reconsume, pos);
@@ -1461,9 +1458,6 @@ nsHtml5Tokenizer::stateLoop(int32_t state, char16_t c, int32_t pos, char16_t* bu
           NS_HTML5_BREAK(stateloop);
         }
         c = checkChar(buf, pos);
-        if (c == '\0') {
-          NS_HTML5_BREAK(stateloop);
-        }
         switch(c) {
           case ' ':
           case '\t':
@@ -1471,7 +1465,8 @@ nsHtml5Tokenizer::stateLoop(int32_t state, char16_t c, int32_t pos, char16_t* bu
           case '\r':
           case '\f':
           case '<':
-          case '&': {
+          case '&':
+          case '\0': {
             emitOrAppendCharRefBuf(returnState);
             if (!(returnState & NS_HTML5TOKENIZER_DATA_AND_RCDATA_MASK)) {
               cstart = pos;
@@ -1519,9 +1514,6 @@ nsHtml5Tokenizer::stateLoop(int32_t state, char16_t c, int32_t pos, char16_t* bu
             NS_HTML5_BREAK(stateloop);
           }
           c = checkChar(buf, pos);
-          if (c == '\0') {
-            NS_HTML5_BREAK(stateloop);
-          }
           int32_t hilo = 0;
           if (c <= 'z') {
             const int32_t* row = nsHtml5NamedCharactersAccel::HILO_ACCEL[c];
@@ -1556,9 +1548,6 @@ nsHtml5Tokenizer::stateLoop(int32_t state, char16_t c, int32_t pos, char16_t* bu
             NS_HTML5_BREAK(stateloop);
           }
           c = checkChar(buf, pos);
-          if (c == '\0') {
-            NS_HTML5_BREAK(stateloop);
-          }
           entCol++;
           for (; ; ) {
             if (hi < lo) {