[Minor] Do not decompress empty stream as zst behaves badly in this case

diff --git a/src/lua/lua_compress.c b/src/lua/lua_compress.c
index 8d2a7e70b095ae38335bb674315fb4ee51ef5b32..5bebd0e0d95845674b102d0b364cec338f441592 100644 (file)
--- a/src/lua/lua_compress.c
+++ b/src/lua/lua_compress.c
@@ -545,6 +545,10 @@ lua_zstd_decompress_stream (lua_State *L)
        if (ctx && t) {
                gsize dlen = 0;
 
+               if (t->len == 0) {
+                       return lua_zstd_push_error (L, ZSTD_error_init_missing);
+               }
+
                inb.size = t->len;
                inb.pos = 0;
                inb.src = (const void*)t->start;