The -print-lines option disables tab completion in REPL

[adpi2]

Originally reported in sbt/sbt#6780 by @jhnaldo

Compiler version

3.1.0

Minimized code

$ scala3-repl -print-lines
Welcome to Scala 3.1.0 (1.8.0_275, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.
                                                                                
scala> val hello = 42
     |val hello: Int = 42
                                                                                
scala>hel<TAB>

Tab completion does not work.

Expectation

Tab completion should work when -print-lines is turned on.

[tgodzik]

This also impacts a bunch of other features related to IDEs

[tgodzik]

This should be great for the Spree

[smarter]

... what is -print-lines supposed to do? Can we remove it? 😅

[tgodzik]

Apparently it adds line numbers: Show source code line numbers.

[smarter]

But where? I didn't see any difference in the error output

[tgodzik]

But where? I didn't see any difference in the error output

Seems it was added for decompiling code here: #3523

Not sure why would anyone add it to their normal scalac settings though.

[ValeriePe]

This issue was picked for the Issue Spree n°20 of September 6th which takes place in a week from now. @SethTisue @mbovel @markehammons will be working on it. If you have any insight into the issue or guidance on how to fix it, please leave it here.

[SethTisue]

Seem to be fixed in 3.2.0. I can reproduce it with scala-cli repl -S 3.1.0 -O -print-lines but not with scala-cli repl -S 3.2.0 -O -print-lines.