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-rw-r--r--php/ext/google/protobuf/upb.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/php/ext/google/protobuf/upb.c b/php/ext/google/protobuf/upb.c
index cac2b401..d701dcba 100644
--- a/php/ext/google/protobuf/upb.c
+++ b/php/ext/google/protobuf/upb.c
@@ -2308,6 +2308,9 @@ bool upb_symtab_addfile(upb_symtab *s, upb_filedef *file, upb_status *status) {
bool ret;
n = upb_filedef_defcount(file);
+ if (n == 0) {
+ return true;
+ }
defs = upb_gmalloc(sizeof(*defs) * n);
if (defs == NULL) {