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-rw-r--r--src/fs/io/Reader.hxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/fs/io/Reader.hxx b/src/fs/io/Reader.hxx
index adf7a0667..d41e92dd0 100644
--- a/src/fs/io/Reader.hxx
+++ b/src/fs/io/Reader.hxx
@@ -45,6 +45,7 @@ public:
* @return the number of bytes read into the given buffer or 0
* on error/end-of-stream
*/
+ gcc_nonnull_all
virtual size_t Read(void *data, size_t size, Error &error) = 0;
};