Update to handle dsym files that end with a header.

src/common/dwarf/dwarf2reader.cc

Index: src/common/dwarf/dwarf2reader.cc
diff --git a/src/common/dwarf/dwarf2reader.cc b/src/common/dwarf/dwarf2reader.cc
index 003ed7b188b6457a2ac3f84c787c823004cd524e..dc0e2349b02a4a9f07d7d0cf297fa44400247739 100644
--- a/src/common/dwarf/dwarf2reader.cc
+++ b/src/common/dwarf/dwarf2reader.cc
@@ -266,7 +266,9 @@ void CompilationUnit::ReadHeader() {
   header_.abbrev_offset = reader_->ReadOffset(headerptr);
   headerptr += reader_->OffsetSize();
 
-  assert(headerptr + 1 < buffer_ + buffer_length_);
+  // Compare against less than or equal because this may be the last
+  // section in the file.
+  assert(headerptr + 1 <= buffer_ + buffer_length_);
   header_.address_size = reader_->ReadOneByte(headerptr);
   reader_->SetAddressSize(header_.address_size);
   headerptr += 1;