gistfile1.txt

diff --git a/src/io/syncfile.c b/src/io/syncfile.c
index 904ab6c..6d32d34 100644
--- a/src/io/syncfile.c
+++ b/src/io/syncfile.c
@@ -183,8 +183,9 @@ static MVMint64 eof(MVMThreadContext *tc, MVMOSHandle *h) {
     uv_fs_t  req;
     if (data->ds && !MVM_string_decodestream_is_empty(tc, data->ds))
         return 0;
-    if ((r = uv_fs_lstat(tc->loop, &req, data->filename, NULL)) == -1)
-        MVM_exception_throw_adhoc(tc, "Failed to stat in filehandle: %d", errno);
+    if (data->filename)
+        if ((r = uv_fs_lstat(tc->loop, &req, data->filename, NULL)) == -1)
+            MVM_exception_throw_adhoc(tc, "Failed to stat in filehandle: %d", errno);
     if ((seek_pos = MVM_platform_lseek(data->fd, 0, SEEK_CUR)) == -1)
         MVM_exception_throw_adhoc(tc, "Failed to seek in filehandle: %d", errno);
     return req.statbuf.st_size == seek_pos;