Improvements to try resolve the issues with login checksums.

ptlinux/cli.py

@@ -353,6 +353,15 @@ def _login_diagnostics(paths: AppPaths, timeout_seconds: float, as_json: bool) -
 		print(f"game.dll:      {report.game_dll}")
 		if report.game_dll_sha256:
 			print(f"DLL SHA-256:   {report.game_dll_sha256}")
+		print(
+			"Managed source: "
+			+ ("matches runtime" if report.runtime_matches_managed_source else "DIFFERS")
+		)
+		if report.depot_build is not None:
+			print(
+				f"Depot:         build {report.depot_build} "
+				f"({report.depot_version or 'unknown version'})"
+			)
 		world_fix_status = "enabled" if report.world_fix_enabled else "retired"
 		print(f"World fix:     {world_fix_status}")
 		if report.world_fix_disabled_reason:
@@ -676,6 +685,12 @@ def _play_locked(
 		native_log_baseline,
 		game_started_ns,
 	)
+	runtime_issues = _runtime_issue_summary(outcome.stderr)
+	if (
+		selection.kind == "proton7-container"
+		and runtime_issues["host_futex_fatal_count"]
+	):
+		runtime_issues["recommended_one_variable_comparison"] = "proton7"
 	world_fix_status = None
 	_emit(
 		{
@@ -686,6 +701,7 @@ def _play_locked(
 			"setup_commands": [asdict(result) for result in setup_results],
 			"game": asdict(outcome),
 			"current_game_log": current_game_log,
+			"runtime_issues": runtime_issues,
 			"world_fix": world_fix_status,
 		},
 		as_json,
@@ -736,6 +752,19 @@ def _current_game_log(
 	}
 
 
+def _runtime_issue_summary(stderr: str) -> dict[str, object]:
+	folded = stderr.casefold()
+	futex_message = "the futex facility returned an unexpected error code"
+	wrong_elf_message = "wrong elf class: elfclass64"
+	return {
+		"host_futex_fatal_count": folded.count(futex_message),
+		"gstreamer_wrong_elf_class_count": folded.count(wrong_elf_message),
+		"gstreamer_stream_error": "winegstreamer error" in folded,
+		"mesa_egl_initialization_failed": "egl: failed to create dri2 screen" in folded,
+		"steam_api_app_id_missing": "steamapi_init() failed; no appid found" in folded,
+	}
+
+
 def _print_interrupted_game_log(report: dict[str, object]) -> None:
 	print(f"\nCurrent game log: {report['path']}", file=sys.stderr)
 	if report["module_code_sync_error"]: