Something wrong with diff --color-words=regexp?

From: Mike Hommey <mh@glandium.org>
Date: Feb 19, 2015, 23:52 UTC
Message-ID: <20150219235213.GA1291@glandium.org>

Hi,

I was trying to use --color-words with a regex to check a diff, and it appears it displays things out of order. Am I misunderstanding what my regexp should be doing or is there a bug?

$ git diff -U3 HEAD^ dom/base/nsDOMFileReader.cpp

diff --git a/dom/base/nsDOMFileReader.cpp b/dom/base/nsDOMFileReader.cpp
index 6267e0e..fa22590 100644
--- a/dom/base/nsDOMFileReader.cpp
+++ b/dom/base/nsDOMFileReader.cpp
@@ -363,7 +363,7 @@ nsDOMFileReader::DoReadData(nsIAsyncInputStream* aStream, uint64_t aCount)
       return NS_ERROR_OUT_OF_MEMORY;
     }
     if (mDataFormat != FILE_AS_ARRAYBUFFER) {
-      mFileData = (char *) moz_realloc(mFileData, mDataLen + aCount);
+      mFileData = (char *) realloc(mFileData, mDataLen + aCount);
       NS_ENSURE_TRUE(mFileData, NS_ERROR_OUT_OF_MEMORY);
     }
 
$ git diff -U3 --color-words='[^ ()]' HEAD^ dom/base/nsDOMFileReader.cpp 
diff --git a/dom/base/nsDOMFileReader.cpp b/dom/base/nsDOMFileReader.cpp
index 6267e0e..fa22590 100644
--- a/dom/base/nsDOMFileReader.cpp
+++ b/dom/base/nsDOMFileReader.cpp
@@ -363,7 +363,7 @@ nsDOMFileReader::DoReadData(nsIAsyncInputStream* aStream, uint64_t aCount)
      return NS_ERROR_OUT_OF_MEMORY;
    }
    if (mDataFormat != FILE_AS_ARRAYBUFFER) {
      mFileData = (char *moz_) realloc(mFileData, mDataLen + aCount);
      NS_ENSURE_TRUE(mFileData, NS_ERROR_OUT_OF_MEMORY);
    }


(This is with 2.3.0)

Cheers,

Mike