Higher Order Generics: Runtime "Type Error: cannot read property ... of underfined" on type function invocation

[lukedegruchy]

Write the following higher order generics code using the production 1.2.0 Eclipse plugin:

    Set<Param> getSet<Param>(Set<Param> params, Param next) given Param satisfies Object
        => set(params.sequence().withTrailing(next));

    <Param> given Param satisfies Object => Set<Param>(Set<Param>, Param) ref = getSet;

    value mySet = ref(set{1,2,3}, 4);

Attempt to run it.

This error happens:

${ECLIPSE_WORKSPACE}/HigherOrderGenerics/modules/luke/higherOrderGenerics/1.0.0/luke.higherOrderGenerics-1.0.0.js:96
var $cf7=function($cf8,$cf9,$romevz$){return m$cdm.set($cf8.sequence().withTrailing($cf9,{Other$withTrailing:$romevz$.Param$getSet}),undefined,{Element$set:$romevz$.Param$getSet});};
                                                                                                                     ^

TypeError: Cannot read property 'Param$getSet' of undefined
    at Number.$cf7 (${ECLIPSE_WORKSPACE}/HigherOrderGenerics/modules/luke/higherOrderGenerics/1.0.0/luke.higherOrderGenerics-1.0.0.js:96:118)
    at c2 (${Eclipse.app}/Contents/Eclipse/plugins/com.redhat.ceylon.dist.repo_1.2.0.v20151028-2216/repo/ceylon/language/1.2.0/ceylon.language-1.2.0.js:690:10)
    at runStreamStuff (${ECLIPSE_WORKSPACE}/HigherOrderGenerics/modules/luke/higherOrderGenerics/1.0.0/luke.higherOrderGenerics-1.0.0.js:99:10)
    at [eval]:1:358
    at Object.exports.runInThisContext (vm.js:54:17)
    at Object.<anonymous> ([eval]-wrapper:6:22)
    at Module._compile (module.js:435:26)
    at node.js:576:27
    at doNTCallback0 (node.js:417:9)
    at process._tickCallback (node.js:346:13)
ceylon run-js: Node process exited with non-zero exit code: 1