Error message is not correct processed

[ManuW]

I played around with Pkl. Now I tried to generate swift code from it, but it failed. I got following error message

$ ./pkl-gen-swift-macos.bin --version
0.3.0
                                                                         
$ ./pkl-gen-swift-macos.bin -o test tuclib/Timer1.pkl
Error: PklError(message: "–– Pkl Error ––\nCannot generate type Version as Swift.\n\n70 | else throw(\"Cannot generate type \\(type.referent.name) as Swift.\")\n          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.typegen#generateDeclaredType.<function#3> (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/typegen.pkl#L70-L70)\n\n64 | let (mapped = seenMappings.findOrNull((it) -> it.source == referent))\n     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.typegen#generateDeclaredType.<function#2> (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/typegen.pkl#L64-L70)\n\n63 | let (reflectee = type.referent.reflectee)\n     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.typegen#generateDeclaredType.<function#1> (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/typegen.pkl#L63-L70)\n\n62 | let (referent = type.referent)\n     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.typegen#generateDeclaredType (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/typegen.pkl#L62-L70)\n\n30 | generateDeclaredType(type, enclosing, seenMappings)\n     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.typegen#generateType (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/typegen.pkl#L30-L30)\n\n121 | type = typegen.generateType(prop.type, clazz, mappings)\n             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.ClassGen#getProperties.<function#7>.type (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/ClassGen.pkl#L121-L121)\n\n369 | isPolymorphic: Boolean = type.isPolymorphic\n                               ^^^^\nat pkl.swift.internal.ClassGen#Property.isPolymorphic (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/ClassGen.pkl#L369-L369)\n\n162 | when (properties.values.any((p) -> p.isPolymorphic)) {\n                                         ^^^^^^^^^^^^^^^\nat pkl.swift.internal.ClassGen#struct.<function#2> (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/ClassGen.pkl#L162-L162)\n\n162 | when (properties.values.any((p) -> p.isPolymorphic)) {\n            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat pkl.swift.internal.ClassGen#struct (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/ClassGen.pkl#L162-L162)\n\n43 | struct\n     ^^^^^^\nat pkl.swift.internal.ClassGen#contents[#3] (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/ClassGen.pkl#L43-L43)\n\n35 | contents = new Listing {\n                ^^^^^^^^^^^^^\nat pkl.swift.internal.ClassGen#contents (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/ClassGen.pkl#L35-L45)\n\n151 | text = contents\n             ^^^^^^^^\nat pkl.swift.internal.SwiftNamespace#output.files[#1].text (https://github.com/apple/pkl-swift/blob/0.3.0/codegen/src/internal/SwiftNamespace.pkl#L151-L151)\n\n1 | output.files.toMap().mapValues((_, it) -> it.text)\n                                              ^^^^^^^\nat repl:text.<function#1> (repl:text)\n\n1 | output.files.toMap().mapValues((_, it) -> it.text)\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nat  (repl:text)\n")

Looks like something went wrong when printing the error: It's just one line and it's looks like the error code print commandos are logged and not the error message itself.

Way to reproduce: Create a test.pkl file with following content

import "pkl:semver"

version: semver.Version

and then run ./pkl-gen-swift-macos.bin -o test test.pkl