Sometimes an expression `versionFile.readText()`
returns an empty string, so that `toInt()` fails
with `NumberFormatException`.
It can happen in with both JPS and Gradle.
I could not reproduce the problem,
and it seems to be impossible (under normal circumstances),
because we always write a non-empty string,
and the file is checked to exist before reading.
Maybe it could be caused by an FS error.
The only "solution" to the problem I could think
is to swallow the exception, and assume
that cache version is not valid (so it would cause a rebuild of a module).
#KT-17125 fixed
Fixing the problem introduced in the commit 9819de1abd:
the daemon client messages should be reported
when the debug log level is enabled
or when the connection not successful
#KT-17199 fixed
Note that there are some other problems, for example:
`val a = if (true) 1 as Number else 2`, here we'll get useless cast
#KT-9551 Fixed
#KT-9645 Fixed
#KT-11916 fixed
To use the IC either:
1. set the `kotlin.compiler.incremental` property to `true` in a pom.xml:
```
<properties>
<kotlin.compiler.incremental>true</kotlin.compiler.incremental>
</properties>
```
2. pass the `kotlin.compiler.incremental` property in a command line:
```
mvn install -Dkotlin.compiler.incremental=true
```
When IC is on Kotlin plugin is expected to print the warning in the log:
```
Using experimental Kotlin incremental compilation
```
After each call an incremental compiler will also log how many files it has compiled:
```
Compiled %SOME_NUMBER% Kotlin files using incremental compiler
```
Note that the first build will be non-incremental.
For more diagnostic information (such as an exact list of compiled files) use the `kotlin.compiler.incremental.log.level` system property:
```
mvn install -Dkotlin.compiler.incremental=true -Dkotlin.compiler.incremental.log.level=info
```
To force the rebuild just run the 'clean' goal:
```
mvn clean install
```
xercesImpl was unnecessarily added to the compiler uberjar during migration
to the idea platform 171. This caused NCDFE about classes from org.w3c
package.
And to simplify application of this commit and to ensure that only required
jars are packed into the uberjar, the build.xml was altered to use
explicit list of the jars from the ideaSdk/core directory, rather than
a mask.
Fixes #KT-17143 and #KT-17157
(cherry picked from commit 5595bea)
Ilya Chernikov