ICE when nested type definition does not use referrent name

[mwu-tow]

Running the following file produces ICE:

type Foo
    type bar
    type Baz

main = Nothing

It works fine if I replace bar with Bar.

Output:

Exception in thread "main" org.graalvm.polyglot.PolyglotException: org.enso.compiler.exception.CompilerError: Compiler Internal Error: Unexpected IR node in complex type body.
        at org.enso.compiler.pass.desugar.ComplexType$.$anonfun$desugarComplexType$6(ComplexType.scala:173)
        at scala.collection.immutable.List.flatMap(List.scala:293)
        at org.enso.compiler.pass.desugar.ComplexType$.desugarComplexType(ComplexType.scala:163)
        at org.enso.compiler.pass.desugar.ComplexType$.$anonfun$runModule$1(ComplexType.scala:78)
        at scala.collection.immutable.List.flatMap(List.scala:293)
        at org.enso.compiler.pass.desugar.ComplexType$.runModule(ComplexType.scala:77)
        at org.enso.compiler.pass.PassManager.$anonfun$runPassesOnModule$2(PassManager.scala:101)
        at scala.collection.LinearSeqOps.foldLeft(LinearSeq.scala:169)
        at scala.collection.LinearSeqOps.foldLeft$(LinearSeq.scala:165)
        at scala.collection.immutable.List.foldLeft(List.scala:79)
        at org.enso.compiler.pass.PassManager.runPassesOnModule(PassManager.scala:92)
        at org.enso.compiler.Compiler.recognizeBindings(Compiler.scala:253)
        at org.enso.compiler.Compiler.parseModule(Compiler.scala:128)
        at org.enso.compiler.Compiler.run(Compiler.scala:69)
        at org.enso.interpreter.runtime.Module.compile(Module.java:241)
        at org.enso.interpreter.runtime.Module.compileScope(Module.java:202)
        at org.enso.interpreter.runtime.Module$InvokeMember.doInvoke(Module.java:405)
        at org.enso.interpreter.runtime.ModuleGen$InteropLibraryExports$Cached.executeAndSpecialize(ModuleGen.java:109)
        at org.enso.interpreter.runtime.ModuleGen$InteropLibraryExports$Cached.invokeMember(ModuleGen.java:89)
        at org.graalvm.truffle/com.oracle.truffle.api.interop.InteropLibraryGen$CachedDispatch.invokeMember(InteropLibraryGen.java:6078)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotValue$InteropCodeCache$AbstractInvokeNode.executeShared(PolyglotValue.java:2158)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotValue$InteropCodeCache$InvokeNoArgsNode.executeImpl(PolyglotValue.java:2222)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.HostToGuestRootNode.execute(HostToGuestRootNode.java:119)
        at org.graalvm.sdk/org.graalvm.polyglot.Value.invokeMember(Value.java:548)
        at org.enso.polyglot.Module.getAssociatedConstructor(Module.scala:15)
        at org.enso.runner.Main$.runMain(Main.scala:386)
        at org.enso.runner.Main$.runSingleFile(Main.scala:326)
        at org.enso.runner.Main$.run(Main.scala:309)
        at org.enso.runner.Main$.main(Main.scala:556)
        at org.enso.runner.Main.main(Main.scala)
Original Internal Error:
org.enso.compiler.exception.CompilerError: Compiler Internal Error: Unexpected IR node in complex type body.
        at org.enso.compiler.pass.desugar.ComplexType$.$anonfun$desugarComplexType$6(ComplexType.scala:173)
        at scala.collection.immutable.List.flatMap(List.scala:293)
        at org.enso.compiler.pass.desugar.ComplexType$.desugarComplexType(ComplexType.scala:163)
        at org.enso.compiler.pass.desugar.ComplexType$.$anonfun$runModule$1(ComplexType.scala:78)
        at scala.collection.immutable.List.flatMap(List.scala:293)
        at org.enso.compiler.pass.desugar.ComplexType$.runModule(ComplexType.scala:77)
        at org.enso.compiler.pass.PassManager.$anonfun$runPassesOnModule$2(PassManager.scala:101)
        at scala.collection.LinearSeqOps.foldLeft(LinearSeq.scala:169)
        at scala.collection.LinearSeqOps.foldLeft$(LinearSeq.scala:165)
        at scala.collection.immutable.List.foldLeft(List.scala:79)
        at org.enso.compiler.pass.PassManager.runPassesOnModule(PassManager.scala:92)
        at org.enso.compiler.Compiler.recognizeBindings(Compiler.scala:253)
        at org.enso.compiler.Compiler.parseModule(Compiler.scala:128)
        at org.enso.compiler.Compiler.run(Compiler.scala:69)
        at org.enso.interpreter.runtime.Module.compile(Module.java:241)
        at org.enso.interpreter.runtime.Module.compileScope(Module.java:202)
        at org.enso.interpreter.runtime.Module$InvokeMember.doInvoke(Module.java:405)
        at org.enso.interpreter.runtime.ModuleGen$InteropLibraryExports$Cached.executeAndSpecialize(ModuleGen.java:109)
        at org.enso.interpreter.runtime.ModuleGen$InteropLibraryExports$Cached.invokeMember(ModuleGen.java:89)
        at org.graalvm.truffle/com.oracle.truffle.api.interop.InteropLibraryGen$CachedDispatch.invokeMember(InteropLibraryGen.java:6078)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotValue$InteropCodeCache$AbstractInvokeNode.executeShared(PolyglotValue.java:2158)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotValue$InteropCodeCache$InvokeNoArgsNode.executeImpl(PolyglotValue.java:2222)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.HostToGuestRootNode.execute(HostToGuestRootNode.java:119)
        at jdk.internal.vm.compiler/org.graalvm.compiler.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:591)
        at jdk.internal.vm.compiler/org.graalvm.compiler.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:562)
        at jdk.internal.vm.compiler/org.graalvm.compiler.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:512)
        at jdk.internal.vm.compiler/org.graalvm.compiler.truffle.runtime.OptimizedCallTarget.doInvoke(OptimizedCallTarget.java:496)
        at jdk.internal.vm.compiler/org.graalvm.compiler.truffle.runtime.GraalRuntimeSupport.callProfiled(GraalRuntimeSupport.java:136)
        at org.graalvm.truffle/com.oracle.truffle.polyglot.PolyglotValue$InteropValue.invoke(PolyglotValue.java:2903)
        at org.graalvm.sdk/org.graalvm.polyglot.Value.invokeMember(Value.java:548)
        at org.enso.polyglot.Module.getAssociatedConstructor(Module.scala:15)
        at org.enso.runner.Main$.runMain(Main.scala:386)
        at org.enso.runner.Main$.runSingleFile(Main.scala:326)
        at org.enso.runner.Main$.run(Main.scala:309)
        at org.enso.runner.Main$.main(Main.scala:556)
        at org.enso.runner.Main.main(Main.scala)
Caused by: Attached Guest Language Frames (1)

Enso Version

0.2.7