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-rw-r--r--src/byte_source.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/byte_source.c b/src/byte_source.c
index 397ea6d7..7a839875 100644
--- a/src/byte_source.c
+++ b/src/byte_source.c
@@ -8,6 +8,7 @@
#include "serd/node.h"
#include "serd/string_view.h"
+#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
@@ -46,7 +47,10 @@ serd_byte_source_open_source(SerdByteSource* const source,
const SerdNode* const name,
const size_t page_size)
{
+ assert(read_func);
+ assert(error_func);
assert(page_size > 0);
+
memset(source, '\0', sizeof(*source));
source->read_func = read_func;
source->error_func = error_func;