Root cause (confirmed by standalone reproducer): the Open Workspace
folder picker. GTK's GtkPlacesSidebar enumeration inside
gtk_file_chooser_dialog_new(SELECT_FOLDER) builds GFileInfo objects
without standard::size, then calls g_file_info_get_size() — a
GTK-internal bug that emits a GLib-GIO-CRITICAL pair on every pick.
Ruled out the T-138 clipboard channel.
Two-part fix:
- Switch pickDirectory to GtkFileChooserNative (portal-backed; runs
out-of-process and silently in sandboxed/Flatpak builds).
- Install a narrowly-scoped GLib-GIO log handler that drops only the
"g_file_info_get_size / without standard::size" message and forwards
every other GLib-GIO critical untouched — the universal fix for the
non-sandbox fallback path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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