Warning and fixup for user string as format.

Fixes: 145819305
Test: aidl_parser_fuzzer w/ cases such as "Wenum o{//%n"
Change-Id: I3d8b456e4c465a7be4343d2591c0e8ccef6e3989

1 files changed, 2 insertions, 2 deletions

diff --git a/code_writer.cpp b/code_writer.cpp
index 6d54d405..096c8955 100644
--- a/code_writer.cpp
+++ b/code_writer.cpp
@@ -89,12 +89,12 @@ bool CodeWriter::Close() {
 }
 
 CodeWriter& CodeWriter::operator<<(const char* s) {
-  Write(s);
+  Write("%s", s);
   return *this;
 }
 
 CodeWriter& CodeWriter::operator<<(const std::string& str) {
-  Write(str.c_str());
+  Write("%s", str.c_str());
   return *this;
 }