return 0 on fread on invalid stream

1 files changed, 1 insertions, 0 deletions

diff --git a/src/library.js b/src/library.js
index 77633c5e..d6601077 100644
--- a/src/library.js
+++ b/src/library.js
@@ -2519,6 +2519,7 @@ LibraryManager.library = {
     }
     var bytesRead = 0;
     var streamObj = FS.getStream(stream);
+    if (!streamObj) return 0;
     while (streamObj.ungotten.length && bytesToRead > 0) {
       {{{ makeSetValue('ptr++', '0', 'streamObj.ungotten.pop()', 'i8') }}}
       bytesToRead--;