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-rw-r--r--src/indexer.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/indexer.c b/src/indexer.c
index 11268e018..ebfdffb47 100644
--- a/src/indexer.c
+++ b/src/indexer.c
@@ -429,6 +429,7 @@ static int write_at(git_indexer *idx, const void *data, git_off_t offset, size_t
git_file fd = idx->pack->mwf.fd;
long page_size = git__page_size();
git_off_t page_start, page_offset;
+ unsigned char *map_data;
git_map map;
int error;
@@ -439,7 +440,8 @@ static int write_at(git_indexer *idx, const void *data, git_off_t offset, size_t
if ((error = p_mmap(&map, page_offset + size, GIT_PROT_WRITE, GIT_MAP_SHARED, fd, page_start)) < 0)
return error;
- memcpy(map.data + page_offset, data, size);
+ map_data = (unsigned char *)map.data;
+ memcpy(map_data + page_offset, data, size);
p_munmap(&map);
return 0;