Added more guard code for syntax errors. Further fix for #316.

Author: gsherwood

CodeSniffer/Standards/Generic/Sniffs/Functions/CallTimePassByReferenceSniff.php

@@ -93,10 +93,18 @@ public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
             return;
         }
 
+        if (isset($tokens[$openBracket]['parenthesis_closer']) === false) {
+            return;
+        }
+
         $closeBracket = $tokens[$openBracket]['parenthesis_closer'];
 
         $nextSeparator = $openBracket;
         while (($nextSeparator = $phpcsFile->findNext(T_VARIABLE, ($nextSeparator + 1), $closeBracket)) !== false) {
+            if (isset($tokens[$nextSeparator]['nested_parenthesis']) === false) {
+                continue;
+            }
+
             // Make sure the variable belongs directly to this function call
             // and is not inside a nested function call or array.
             $brackets    = $tokens[$nextSeparator]['nested_parenthesis'];

CodeSniffer/Standards/PSR2/Sniffs/ControlStructures/ControlStructureSpacingSniff.php

@@ -80,7 +80,9 @@ public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
         $this->requiredSpacesBeforeClose = (int) $this->requiredSpacesBeforeClose;
         $tokens = $phpcsFile->getTokens();
 
-        if (isset($tokens[$stackPtr]['parenthesis_opener']) === true) {
+        if (isset($tokens[$stackPtr]['parenthesis_opener']) === true
+            && isset($tokens[$stackPtr]['parenthesis_closer']) === true
+        ) {
             $parenOpener    = $tokens[$stackPtr]['parenthesis_opener'];
             $parenCloser    = $tokens[$stackPtr]['parenthesis_closer'];
             $spaceAfterOpen = 0;

CodeSniffer/Standards/Squiz/Sniffs/Classes/ClassDeclarationSniff.php

@@ -113,6 +113,9 @@ public function processOpen(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
     public function processClose(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
     {
         $tokens = $phpcsFile->getTokens();
+        if (isset($tokens[$stackPtr]['scope_closer']) === false) {
+            return;
+        }
 
         $closeBrace = $tokens[$stackPtr]['scope_closer'];
         if ($tokens[($closeBrace - 1)]['code'] === T_WHITESPACE) {

CodeSniffer/Standards/Squiz/Sniffs/WhiteSpace/ControlStructureSpacingSniff.php

@@ -75,7 +75,9 @@ public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
     {
         $tokens = $phpcsFile->getTokens();
 
-        if (isset($tokens[$stackPtr]['parenthesis_opener']) === true) {
+        if (isset($tokens[$stackPtr]['parenthesis_opener']) === true
+            && isset($tokens[$stackPtr]['parenthesis_closer']) === true
+        ) {
             $parenOpener = $tokens[$stackPtr]['parenthesis_opener'];
             $parenCloser = $tokens[$stackPtr]['parenthesis_closer'];
             if ($tokens[($parenOpener + 1)]['code'] === T_WHITESPACE) {