2 files changed, 5 insertions, 2 deletions
diff --git a/src/google/protobuf/testing/file.cc b/src/google/protobuf/testing/file.cc
index f32222b7..f68aba9a 100644
--- a/src/google/protobuf/testing/file.cc
+++ b/src/google/protobuf/testing/file.cc
@@ -121,7 +121,7 @@ void File::WriteStringToFileOrDie(const string& contents, const string& name) {
 
 bool File::CreateDir(const string& name, int mode) {
   if (!name.empty()) {
-    GOOGLE_CHECK_OK(name.back() != '.');
+    GOOGLE_CHECK_OK(name[name.size() - 1] != '.');
   }
   return mkdir(name.c_str(), mode) == 0;
 }
diff --git a/src/google/protobuf/testing/zcgunzip.cc b/src/google/protobuf/testing/zcgunzip.cc
index 76f8cfe1..349ad86e 100644
--- a/src/google/protobuf/testing/zcgunzip.cc
+++ b/src/google/protobuf/testing/zcgunzip.cc
@@ -72,7 +72,10 @@ int main(int argc, const char** argv) {
     }
     if (inlen > 0) {
       int err = write(STDOUT_FILENO, inptr, inlen);
-      assert(err == inlen);
+      if (err != inlen) {
+        fprintf(stderr, "write unexpectedly returned %d.\n", err);
+        return 1;
+      }
     }
   }