IntelliJ IDEA tells me "Error:java: Compilation failed: internal java compiler error idea"

Solution 1:

1. On Intellij IDEA Ctrl + Alt + S to open settings.
2. Build, Execution, Deployment -> Compiler -> Java Compiler
3. choose your java version from Project bytecode version
4. Uncheck Use compiler from module target JDK when possible
5. click apply and ok.

Solution 2:

I solved this issue by increasing the default value(700) of Build process heap size on IntelliJ's compiler settings.

Solution 3:

I changed my compiler to Eclipse and run my project. Afterwards changed back to Javac and problem solved. I don't know exact problem but it can help who is looking for solution.

Solution 4:

In my case, using Java 11, I had:

 public List<String> foo() {
   ...
   return response.readEntity(new GenericType<List<String>>() {});

and Intellij suggested I should use <> instead of GenericType<List<String>>, as such:

 public List<String> foo() {
   ...
   return response.readEntity(new GenericType<>() {});

I did that in four functions and the project stopped compiling with an internal compiler error, reverted and it compiled again. Looks like a bug with type inference.

Solution 5:

For me the module's target bytecode version was set to 5. I changed it to 8 and the error is gone: