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kotlinlang

If I open a .class file that was compiled from kotlin, IJ tries to decompile it as a kotlin, although `// Implementation of methods is not available`
How do I disable that and use standard java decompiler/bytecode viewer? (the option `Show bytecode`is also disabled right now).

There is a "Show kotlin bytecode" tool in the kotlin plugin, but it almost always crashes (with various exceptions depending on provided options). Does this happen to you too?

When you open a .class file, you can invoke an action “Decompile to Java”, but there is no visible link/button to invoke it in the editor, currently. We’ll see if we can add such a link.

See also a related feature request for Kotlin decompiler: <https://youtrack.jetbrains.com/issue/KTIJ-9004>

&gt; There is a “Show kotlin bytecode” tool in the kotlin plugin, but it almost always crashes
This is a mostly internal tool that is supported on a best-effort basis, however if you see crashes, please report them to YouTrack with sample code to reproduce.

“Decompile to Java” is what I needed, thanks! When I use it the "Show bytecode" action is still disabled, but I can easily use some external tool.

As to reporting "Show  kotlin bytecode", well, from my experience it crashes most of the time on not smallish files.
Btw, does the `IR target`switch trigger compilation on IR backend, meaning that it uses old backend otherwise? I can't compare the results because with that checked it virtually always crashes.

&gt; you can invoke an action “Decompile to Java”, but there is no visible link/button to invoke it in the editor, currently. We’ll see if we can add such a link.
Should I file a ticket for that somewhere? Along with enabling the "Show bytecode" action as in java .class'es.

You can watch the issue <https://youtrack.jetbrains.com/issue/MP-4238> about the decompiler.

Yes, IR is disabled by default, please watch <https://youtrack.jetbrains.com/issue/KTIJ-15764>.

For “Show bytecode” action there are <https://youtrack.jetbrains.com/issue/KTIJ-2754>, <https://youtrack.jetbrains.com/issue/KTIJ-10526>