Bug 783502. r=jduell

netwerk/mime/nsMIMEHeaderParamImpl.cpp

@@ -456,7 +456,7 @@ nsMIMEHeaderParamImpl::DoParameterInternal(const char *aHeaderValue,
       ++str;
       valueStart = str;
       for (valueEnd = str; *valueEnd; ++valueEnd) {
-        if (*valueEnd == '\\')
+        if (*valueEnd == '\\' && *(valueEnd + 1))
           ++valueEnd;
         else if (*valueEnd == '"')
           break;

netwerk/test/unit/test_MIME_params.js

@@ -407,6 +407,10 @@ var tests = [
 
   ["attachment filename=foo", 
    "attachment", Cr.NS_ERROR_INVALID_ARG], 
+
+  // Bug 783502 - xpcshell test netwerk/test/unit/test_MIME_params.js fails on AddressSanitizer
+  ['attachment; filename="\\b\\a\\', 
+   "attachment", "ba\\"], 
 ];
 
 var rfc5987paramtests = [