Running listToStrictJSArray [1,2,3] results in the error Uncaught ReferenceError: primStrictWriteArray is not defined (at runtime in the browser).
I'm using ehc-1.1.3, Revision 2422:2426M but the sources at https://github.com/UU-ComputerScience/uhc/blob/master/EHC/src/javascript/rts/prim.cjs don't have a definition either.