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-rw-r--r--src/os_unix.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/os_unix.c b/src/os_unix.c
index 6eed67407..30d79f0c5 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -3152,6 +3152,8 @@ static int unixRead(
unixFile *pFile = (unixFile *)id;
int got;
assert( id );
+ assert( offset>=0 );
+ assert( amt>0 );
/* If this is a database file (not a journal, master-journal or temp
** file), the bytes in the locking range should never be read or written. */