r231066 - clang-format: Fix access to uninitialized memory.

[Daniel Jasper]

Author: djasper
Date: Tue Mar  3 07:59:49 2015
New Revision: 231066

URL: http://llvm.org/viewvc/llvm-project?rev=231066&view=rev
Log:
clang-format: Fix access to uninitialized memory.

With incomplete code, we aren't guaranteed to generated changes for
every token. In that case, we need to assume that even the very first
change can continue a preprocessor directive and initialize values
accordingly.

Modified:
    cfe/trunk/lib/Format/WhitespaceManager.cpp
    cfe/trunk/unittests/Format/FormatTest.cpp

Modified: cfe/trunk/lib/Format/WhitespaceManager.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Format/WhitespaceManager.cpp?rev=231066&r1=231065&r2=231066&view=diff
==============================================================================
--- cfe/trunk/lib/Format/WhitespaceManager.cpp (original)
+++ cfe/trunk/lib/Format/WhitespaceManager.cpp Tue Mar  3 07:59:49 2015
@@ -232,6 +232,7 @@ void WhitespaceManager::alignEscapedNewl
   unsigned MaxEndOfLine =
       Style.AlignEscapedNewlinesLeft ? 0 : Style.ColumnLimit;
   unsigned StartOfMacro = 0;
+  Changes[0].EscapedNewlineColumn = 0;
   for (unsigned i = 1, e = Changes.size(); i < e; ++i) {
     Change &C = Changes[i];
     if (C.NewlinesBefore > 0) {

Modified: cfe/trunk/unittests/Format/FormatTest.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/unittests/Format/FormatTest.cpp?rev=231066&r1=231065&r2=231066&view=diff
==============================================================================
--- cfe/trunk/unittests/Format/FormatTest.cpp (original)
+++ cfe/trunk/unittests/Format/FormatTest.cpp Tue Mar  3 07:59:49 2015
@@ -2656,6 +2656,10 @@ TEST_F(FormatTest, MacroDefinitionsWithI
                getLLVMStyleWithColumns(28));
   verifyFormat("#d, = };");
   verifyFormat("#if \"a");
+  verifyFormat("({\n"
+               "#define b }\\\n"
+               "  a\n"
+               "a");
 
   verifyNoCrash("#if a\na(\n#else\n#endif\n{a");
   verifyNoCrash("a={0,1\n#if a\n#else\n;\n#endif\n}");