Opal.ArgumentError.$new("already bridged");

[thom4parisot]

When I convert a document in combination with asciidoctor.js@1.5.9 and asciidoctor.js-pug@0.8.0, I get this stack trace:

/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:987
      throw Opal.ArgumentError.$new("already bridged");
                               ^

TypeError: Cannot read property '$new' of undefined
    at Object.Opal.bridge (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:987:32)
    at Opal.klass (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:447:12)
    at /Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:5289:29
    at Opal.modules.corelib/error (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:5405:5)
    at Object.Opal.load (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:2202:7)
    at Object_alloc.Opal.require [as $require] (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:2230:17)
    at Opal.modules.opal/base (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:5800:8)
    at Object.Opal.load (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:2202:7)
    at Object_alloc.Opal.require [as $require] (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:2230:17)
    at Opal.modules.opal (/Users/oncletom/workspace/nodebook/node_modules/asciidoctor.js-template/node_modules/opal-runtime/src/opal.js:22152:8)

Does it ring a bell?