GS error not caught by js code

[naren8642]

I am trying to handle a GS font error gracefully. So I tried ghostscript4js. WHen I ran it on a document that i know has a font issue, this was not handled by the library. Here is the output for reference. I am using the example provided on the readme using the callback. It just prints 'All is OK'

(node:2270) Warning: N-API is an experimental feature and could change at any time.
GPL Ghostscript 9.26 (2018-11-20)
Copyright (C) 2018 Artifex Software, Inc. All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Processing pages 1 through 1.
Page 1
Can't find CID font "Calibri".
Attempting to substitute CID font /Adobe-Identity for /Calibri, see doc/Use.htm#CIDFontSubstitution.
The substitute CID font "Adobe-Identity" is not provided either. attempting to use fallback CIDFont.See doc/Use.htm#CIDFontSubstitution.
The fallback CID font "CIDFallBack" is not provided. Finally attempting to use ArtifexBullet.
**** Error reading a content stream. The page may be incomplete.
Output may be incorrect.
**** Error: File did not complete the page properly and may be damaged.
Output may be incorrect.
%%BoundingBox: 17 17 1203 771
%%HiResBoundingBox: 17.421875 17.097656 1202.404297 770.152344
All is ok
root@948c20816c14:/docs#