code-transformation

problem: the shadow classes (CtClass reflecting a binary class) built by JavaReflectionTreeBuilder can be modified. This is confusing for users, see INRIA/spoon#4664.

solution: the JavaReflectionTreeBuilder should construct immutable objects, closed to modification, where all setters throw an UnsupportedOperationException

After using elm-upgrade, I tried to install a package and got this cryptic error:

$ elm install elm/file
-- CORRUPT JSON ----------------------------------------------------------------

The elm.json for elm-community/list-extra 1.0.0 got corrupted somehow.

I removed it from my file cache, so if it was some transient error it should be
fixed if you try the same thing again. Please r

Currently, whenever a TU or TO fails, its error message is only showed if Butterfly is run in debug mode. The error message should be printed even in INFO level, but the error stack trace should remain only printed in debug mode.

Test:

If an function contains if statements that nest N or more deep.