fix ci: progress bar console clearing for latest Rich release

requirements/pytorch/extra.txt

@@ -6,6 +6,6 @@ matplotlib>3.1, <3.10.0
 omegaconf >=2.2.3, <2.4.0
 hydra-core >=1.2.0, <1.4.0
 jsonargparse[signatures,jsonnet] >=4.39.0, <4.41.0
-rich >=12.3.0, <14.1.0
+rich >=12.3.0, <14.2.0
 tensorboardX >=2.2, <2.7.0  # min version is set by torch.onnx missing attribute
 bitsandbytes >=0.45.2,<0.47.0; platform_system != "Darwin"

src/lightning/pytorch/CHANGELOG.md

@@ -25,7 +25,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 
--
+- fix progress bar console clearing for Rich `14.1+` ([#21016](https://github.com/Lightning-AI/pytorch-lightning/pull/21016))
 
 
 ---

src/lightning/pytorch/callbacks/progress/rich_progress.py

@@ -331,7 +331,19 @@ def _init_progress(self, trainer: "pl.Trainer") -> None:
             self._reset_progress_bar_ids()
             reconfigure(**self._console_kwargs)
             self._console = get_console()
-            self._console.clear_live()
+
+            # Compatibility shim for Rich >= 14.1.0:
+            if hasattr(self._console, "_live_stack"):
+                # In recent Rich releases, the internal `_live` variable was replaced with `_live_stack` (a list)
+                # to support nested Live displays. This broke our original call to `clear_live()`,
+                # because it now only pops one Live instance instead of clearing them all.
+                # We check for `_live_stack` and clear it manually for compatibility across
+                # both old and new Rich versions.
+                if len(self._console._live_stack) > 0:
+                    self._console.clear_live()
+            else:
+                self._console.clear_live()
+
             self._metric_component = MetricsTextColumn(
                 trainer,
                 self.theme.metrics,