Ugly log output in Mill 0.12.4

[lefou]

After bumping a project from Mill 0.12.2 to 0.12.4, the log often contains parts of the progress output ruler.

Example output (excerpt): mill __.compile

[3433] [warn] /home/lefou/work/bla/bla/framework/ui.binding.rcp/src/de/bla/richmodel/ui/binding/rcp/jface/formsupport/formeditor/OldRmfEditorPart.java:186:62: getMainBinding() in de.bla.richmodel.ui.binding.editor.EditorController ist veraltet
[3433] [warn] getEditorController().getMainBinding
[3433] [warn]                                     ^
[3433] [warn] /home/lefou/work/bla/bla/framework/ui.binding.rcp/src/de/bla/richmodel/ui/binding/rcp/jface/formsupport/formpage/RichModelFormPage.java:83:27: Mögliches "this"-Escape vor vollständiger Initialisierung der Unterklasse
[3433] [warn] initialize(editor)
[3433] [warn]                   ^
[3433] [warn] /home/lefou/work/bla/bla/framework/ui.binding.rcp/src/de/bla/richmodel/ui/binding/rcp/jface/userinteraction/JfaceListMultipleSelectionDialog.java:82:25: Mögliches "this"-Escape vor vollständiger Initialisierung der Unterklasse
[3433] [warn] setTitle("some title")
[3433] [warn]                       ^
[3433] [warn] /home/lefou/work/bla/bla/framework/ui.binding.rcp/src/org/vafada/swtcalendar/RepeatingButton.java:55:33: Mögliches "this"-Escape vor vollständiger Initialisierung der Unterklasse
[3433] [warn] addMouseListener(new MouseAdapter() {
[3433] [warn] ==================public void mouseDown(MouseEvent event) {
[3433] [warn] ==========================cancelRepeater();
[3433] [warn] 
[3433] [warn] ==========================if (event.button == 1) { // Left click
[3433] [warn] ============================ __.cobuttonPressed(event.stateMask, event.time);
[3433] [warn] 
[3433] [warn] ============================ __.corepeater = new Repeater(event.stateMask);
[3433] [warn] ============================ __.cogetDisplay().timerExec(initialRepeatDelay, repeater);
[3433] [warn] ==========================}
[3433] [warn] ==================}
[3433] [warn] 
[3433] [warn] ==================public void mouseUp(MouseEvent event) {
[3433] [warn] ==========================if (event.button == 1) { // Left click
[3433] [warn] ============================ __.cocancelRepeater();
[3433] [warn] ==========================}
[3433] [warn] ==================}
[3433] [warn] kernel.kot})
[3433] [warn]                                 ^
[3433] [info] done compiling
[3455/3685] framework.uiBindingRcp.test.compile

[lihaoyi]

Probably a consequence of #4053, which tried to minimize screen clears to avoid jittering in the prompt during refreshes

It seems that on your example, spaces and tab characters do not clear any text they are printed over. Not sure if it's a shell thing or a terminal thing. What shell and terminal are you using? Does it reproduce on other terminals?