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Diffstat (limited to 'sfntly/table/bitmap/index_sub_table_format1.cc')
-rw-r--r--sfntly/table/bitmap/index_sub_table_format1.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/sfntly/table/bitmap/index_sub_table_format1.cc b/sfntly/table/bitmap/index_sub_table_format1.cc
index db73723..5199e18 100644
--- a/sfntly/table/bitmap/index_sub_table_format1.cc
+++ b/sfntly/table/bitmap/index_sub_table_format1.cc
@@ -121,6 +121,9 @@ IndexSubTableFormat1::Builder::CreateBuilder(ReadableFontData* data,
ReadableFontDataPtr new_data;
new_data.Attach(down_cast<ReadableFontData*>(
data->Slice(index_sub_table_offset, length)));
+ if (new_data == NULL) {
+ return NULL;
+ }
IndexSubTableFormat1BuilderPtr output =
new IndexSubTableFormat1::Builder(new_data,
first_glyph_index,