TypeError Exception in canonical_form

[jenschude]

Using Ospray with this RAML I get following error:

TypeError: datatype_expansion.canonical_form.Exception is not a constructor
    at /workspace/osprey-raml1.0/node_modules/datatype-expansion/node/datatype_expansion/canonical_form.js:582:12
    at cljs.core.MultiFn.call.G__10851__3 (/workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:33372:108)
    at cljs.core.MultiFn.call.G__10851 [as call] (/workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:33628:20)
    at /workspace/osprey-raml1.0/node_modules/datatype-expansion/node/datatype_expansion/canonical_form.js:530:138
    at /workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:17998:135
    at /workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:7639:96
    at Function.cljs.core.seq_reduce.cljs$core$IFn$_invoke$arity$3 (/workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:7640:3)
    at Function.cljs.core.reduce.cljs$core$IFn$_invoke$arity$3 (/workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:7744:29)
    at Function.cljs.core.mapv.cljs$core$IFn$_invoke$arity$2 (/workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:17997:52)
    at cljs$core$mapv (/workspace/osprey-raml1.0/node_modules/datatype-expansion/node/cljs/core.js:17978:23)

When changing it to Error instead of Exception at least I get the underlying issues reported