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-rw-r--r--src/cairo-mempool.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/cairo-mempool.c b/src/cairo-mempool.c
index 96e4a62b..751ede32 100644
--- a/src/cairo-mempool.c
+++ b/src/cairo-mempool.c
@@ -157,7 +157,8 @@ get_buddy (cairo_mempool_t *pool, size_t offset, int bits)
{
struct _cairo_memblock *block;
- assert (offset + (1 << bits) <= pool->num_blocks);
+ if (offset + (1 << bits) >= pool->num_blocks)
+ return NULL; /* invalid */
if (BITTEST (pool, offset + (1 << bits) - 1))
return NULL; /* buddy is allocated */