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-rw-r--r--libc/src/string/strspn.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/libc/src/string/strspn.cpp b/libc/src/string/strspn.cpp
index 66bb39903ab3..b205bedf80ca 100644
--- a/libc/src/string/strspn.cpp
+++ b/libc/src/string/strspn.cpp
@@ -11,11 +11,14 @@
#include "src/__support/CPP/bitset.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
+#include "src/__support/macros/null_check.h"
#include <stddef.h>
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(size_t, strspn, (const char *src, const char *segment)) {
+ LIBC_CRASH_ON_NULLPTR(src);
+ LIBC_CRASH_ON_NULLPTR(segment);
const char *initial = src;
cpp::bitset<256> bitset;