RunnerClassLoader sanitizeName cannot handle 0 length name argument

[jamesnetherton]

I've been working to make camel-k use the Quarkus fast-jar package format. With Kotlin based Camel routes, the application statup fails.

I'm no Kotlin expert, but its bootstrap is calling getResources("") on the ClassLoader (not sure if that's valid or not). When the name argument passed to RunnerClassLoader.sanitizeName is an empty string, then an exception is thrown:

2021-01-25 13:24:08,916 ERROR [io.qua.run.Application] (main) Failed to start application (with profile prod): 2021-01-25 14:29:11,572 ERROR [io.qua.run.Application] (main) Failed to start application (with profile prod): java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:47)
	at java.base/java.lang.String.charAt(String.java:693)
	at io.quarkus.bootstrap.runner.RunnerClassLoader.sanitizeName(RunnerClassLoader.java:150)
	at io.quarkus.bootstrap.runner.RunnerClassLoader.findResources(RunnerClassLoader.java:180)
	at java.base/java.lang.ClassLoader.getResources(ClassLoader.java:1467)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt.rawClassPathFromKeyResourcePath(jvmClasspathUtil.kt:130)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt.classPathFromTypicalResourceUrls(jvmClasspathUtil.kt:143)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt$classpathFromClassloader$1.invoke(jvmClasspathUtil.kt:87)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt$classpathFromClassloader$1.invoke(jvmClasspathUtil.kt)
	at kotlin.sequences.FlatteningSequence$iterator$1.ensureItemIterator(Sequences.kt:315)
	at kotlin.sequences.FlatteningSequence$iterator$1.hasNext(Sequences.kt:303)
	at kotlin.sequences.FilteringSequence$iterator$1.calcNext(Sequences.kt:169)
	at kotlin.sequences.FilteringSequence$iterator$1.hasNext(Sequences.kt:194)
	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:752)
	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:782)
	at kotlin.sequences.SequencesKt___SequencesKt.toList(_Sequences.kt:773)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt.classpathFromClassloader(jvmClasspathUtil.kt:92)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt.scriptCompilationClasspathFromContextOrNull(jvmClasspathUtil.kt:275)
	at kotlin.script.experimental.jvm.util.JvmClasspathUtilKt.scriptCompilationClasspathFromContext(jvmClasspathUtil.kt:298)
	at kotlin.script.experimental.jvm.JvmScriptCompilationKt.dependenciesFromClassloader(jvmScriptCompilation.kt:57)
	at kotlin.script.experimental.jvm.JvmScriptCompilationKt.dependenciesFromClassloader$default(jvmScriptCompilation.kt:54)

[ghost]

/cc @evanchooly