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-rw-r--r--src/msvc_helper-win32.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/msvc_helper-win32.cc b/src/msvc_helper-win32.cc
index 78b79b0..d516240 100644
--- a/src/msvc_helper-win32.cc
+++ b/src/msvc_helper-win32.cc
@@ -15,6 +15,7 @@
#include "msvc_helper.h"
#include <algorithm>
+#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <windows.h>
@@ -85,6 +86,7 @@ bool CLParser::FilterInputFilename(string line) {
bool CLParser::Parse(const string& output, const string& deps_prefix,
string* filtered_output, string* err) {
// Loop over all lines in the output to process them.
+ assert(&output != filtered_output);
size_t start = 0;
while (start < output.size()) {
size_t end = output.find_first_of("\r\n", start);