The change only affects JPS on TeamCity (in Intellij IC system property
is always set explicitly; the same holds for Gradle, Maven).
Previous changes have effectively enabled the new IC (which is now default)
for TC JPS builds, which is undesirable as more RAM is used.
Write the modular JDK (9+) path to the module.xml file passed to the
compiler from the JPS plugin. This path is then recorded in the compiler
configuration in KotlinToJVMBytecodeCompiler.configureSourceRoots. This
is needed because in JPS plugin, we pass "-no-jdk" and thus no JDK home
path was recorded in the compiler configuration in
K2JVMCompiler.setupJdkClasspathRoots. Presence of JDK home path in the
configuration is crucial for JDK 9 support (see
KotlinCoreEnvironment.Companion.createApplicationEnvironment), because
classes there can only be loaded with the special "jrt" file system, not
as .class files in .jar files
#KT-17801 Fixed
Java sources should appear before classpath dependencies because they should
have higher priority if the same symbol is located in the module source and in
the classpath. This is so because by default module source has the highest
priority in IDEA except the JDK. Ideally this will be handled later by full
support of modules in the compiler
Alexey Tsvetkov