NEWS.md: add notes for 0.20.1

Using meson without an explicit command emits a warning.

.github/workflows/build.yml

@@ -93,10 +93,15 @@ jobs:
           sed -i '/^Types/ s/deb/& deb-src/' /etc/apt/sources.list.d/debian.sources
           apt-get update
           apt-get upgrade -y
-          apt-get install -y git gcc clang gdb xwayland
+          apt-get install -y git gcc clang gdb xwayland meson pkgconf
-          apt-get build-dep -y labwc
+          apt-get build-dep -y libwlroots-0.20-dev
-          apt-get build-dep -y libwlroots-0.19-dev
+          # Debian Testing temporarily removed labwc due to wlroots 0.20 transition
-          apt-get build-dep -y libxkbcommon-dev
+          #apt-get build-dep -y labwc
+          # Install the deps manually
+          apt-get install -y libxml2-dev liblzma-dev libglib2.0-dev \
+            libcairo2-dev libpango1.0-dev libinput-dev libpng-dev \
+            librsvg2-dev wayland-protocols libxkbcommon-dev libdrm-dev \
+            scdoc gettext libwlroots-0.20-dev libsfdo-dev
 
       - name: Install FreeBSD dependencies
         if: matrix.name == 'FreeBSD'

CONTRIBUTING.md

@@ -19,7 +19,8 @@
 - [6. Unit Tests](#unit-tests)
 - [7. Submitting Patches](#submitting-patches)
 - [8. Native Language Support](#native-language-support)
-- [9. Upversion](#upversion)
+- [9. Tools](#tools)
+- [10. Upversion](#upversion)
 
 # How to Contribute
 
@@ -472,6 +473,29 @@ This generates a new pot file at `po/labwc.pot`
 3. Copy the header from the original `labwc.pot` to the new one, keeping
 the newly generated dates, check for sanity and commit.
 
+# Tools
+
+We permit LLM and AI-assisted tooling, but only on the basis that humans remain
+fully accountable. Contributors must use an `Assisted-by:` tag in the commit
+logs if AI tools generated or significantly assisted with any part of the code
+or documentation. Humans retain full legal and technical responsibility for the
+resulting work, including any defects.
+
+We have received Pull Requests where the submitter clearly did not understand
+the code, could not reason about it, and would be unable to maintain it. This
+is not acceptable.
+
+Any AI-generated code contribution must be compatible with the GPL-2.0-only
+license.
+
+While LLMs can be useful for triage, review, clean-up, API refactoring and
+similar tasks, we strongly discourage AI slop. Code review effort is usually the
+project's primary bottleneck, and submitting unreviewed, AI-generated garbage
+wastes reviewer time, slows development, and harms the overall health of the
+project. Likewise, AI-generated commit messages and AI-written text in issues
+and discussions are strongly discouraged and may be treated as sabotage on this
+basis.
+
 # Upversion
 
 It is generally only the lead-maintainer who will upversion, but in order

NEWS.md

@@ -9,7 +9,9 @@ The format is based on [Keep a Changelog]
 
 | Date       | All Changes   | wlroots version | lines-of-code |
 |------------|---------------|-----------------|---------------|
+| 2026-06-15 | [0.20.1]      | 0.20.1          | 28337         |
 | 2026-05-25 | [0.20.0]      | 0.20.1          | 28313         |
+| 2026-06-11 | [0.9.8]       | 0.19.3          | 29284         |
 | 2026-04-17 | [0.9.7]       | 0.19.2          | 29277         |
 | 2026-03-15 | [0.9.6]       | 0.19.2          | 29271         |
 | 2026-03-04 | [0.9.5]       | 0.19.2          | 29251         |
@@ -45,7 +47,9 @@ The format is based on [Keep a Changelog]
 | 2021-03-05 | [0.1.0]       | 0.12.0          | 4627          |
 
 [unreleased]: NEWS.md#unreleased
+[0.20.1]: NEWS.md#0201---2026-06-15
 [0.20.0]: NEWS.md#0200---2026-05-25
+[0.9.8]: NEWS.md#098---2026-06-11
 [0.9.7]: NEWS.md#097---2026-04-17
 [0.9.6]: NEWS.md#096---2026-03-15
 [0.9.5]: NEWS.md#095---2026-03-04
@@ -84,6 +88,35 @@ The format is based on [Keep a Changelog]
 
 [unreleased-commits]
 
+## Notes on wlroots-0.20
+
+There are some regression warnings worth noting for the switch to wlroots 0.20:
+
+- lxqt-panel auto-hiding does not work with a panel size greater than 40 [#3600]
+  [wlroots-5392]
+- Some Wine game windows disappear after alt-tab. It is not yet clear where the
+  bug is, but the issue manifests itself when running wlroots-0.20 [#3615]
+  [wlroots-4103]
+
+[wlroots-5392]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/5392
+[wlroots-4103]: https://gitlab.freedesktop.org/wlroots/wlroots/-/work_items/4103
+
+## 0.20.1 - 2026-06-15
+
+[0.20.1-commits]
+
+This is a small bug fix release.
+
+### Fixed
+
+- Handle titles with no visible characters, for example the left-to-right mark
+  (‎) @Consolatis [#3630]
+- Protect against SIGABRT when TTY switching in unusual circumstances by
+  ensuring that xdg-shell windows have sensible width and height before trying
+  to set size on configure. This protects against an edge case experienced when
+  switching between labwc on one TTY and Xfce on XOrg on another TTY.
+  @johanmalm @Tamaranch [#3617]
+
 ## 0.20.0 - 2026-05-25
 
 [0.20.0-commits]
@@ -217,6 +250,16 @@ There are some regression warnings worth noting for the switch to wlroots 0.19:
 [wlroots-5098]:https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/5098
 [gtk-8792]: https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/8792
 
+## 0.9.8 - 2026-06-11
+
+[0.9.8-commits]
+
+### Fixed
+
+- Handle titles with no visible characters @Consolatis [#3631]
+- Save window position on initial placement to fix Raspberry Pi pygame SDL
+  XWayland window starting off-screen. @tokyo4j [#3433] [#3625] [#3616]
+
 ## 0.9.7 - 2026-04-17
 
 [0.9.7-commits]
@@ -2770,8 +2813,10 @@ Compile with wlroots 0.12.0 and wayland-server >=1.16
   ShowMenu
 
 [Keep a Changelog]: https://keepachangelog.com/en/1.0.0/
-[unreleased-commits]: https://github.com/labwc/labwc/compare/0.20.0...HEAD
+[unreleased-commits]: https://github.com/labwc/labwc/compare/0.20.1...HEAD
+[0.20.1-commits]: https://github.com/labwc/labwc/compare/0.20.0..0.20.1
 [0.20.0-commits]: https://github.com/labwc/labwc/compare/0.9.5..0.20.0
+[0.9.8-commits]: https://github.com/labwc/labwc/compare/0.9.7...0.9.8
 [0.9.7-commits]: https://github.com/labwc/labwc/compare/0.9.6...0.9.7
 [0.9.6-commits]: https://github.com/labwc/labwc/compare/0.9.5...0.9.6
 [0.9.5-commits]: https://github.com/labwc/labwc/compare/0.9.4...0.9.5
@@ -3223,6 +3268,7 @@ Compile with wlroots 0.12.0 and wayland-server >=1.16
 [#2956]: https://github.com/labwc/labwc/pull/2956
 [#2965]: https://github.com/labwc/labwc/pull/2965
 [#2967]: https://github.com/labwc/labwc/pull/2967
+[#2968]: https://github.com/labwc/labwc/pull/2968
 [#2970]: https://github.com/labwc/labwc/pull/2970
 [#2971]: https://github.com/labwc/labwc/pull/2971
 [#2972]: https://github.com/labwc/labwc/pull/2972
@@ -3317,6 +3363,7 @@ Compile with wlroots 0.12.0 and wayland-server >=1.16
 [#3428]: https://github.com/labwc/labwc/pull/3428
 [#3429]: https://github.com/labwc/labwc/pull/3429
 [#3430]: https://github.com/labwc/labwc/pull/3430
+[#3433]: https://github.com/labwc/labwc/pull/3433
 [#3439]: https://github.com/labwc/labwc/pull/3439
 [#3440]: https://github.com/labwc/labwc/pull/3440
 [#3441]: https://github.com/labwc/labwc/pull/3441
@@ -3343,4 +3390,14 @@ Compile with wlroots 0.12.0 and wayland-server >=1.16
 [#3543]: https://github.com/labwc/labwc/pull/3543
 [#3547]: https://github.com/labwc/labwc/pull/3547
 [#3567]: https://github.com/labwc/labwc/pull/3567
+[#3576]: https://github.com/labwc/labwc/pull/3576
+[#3577]: https://github.com/labwc/labwc/pull/3577
+[#3581]: https://github.com/labwc/labwc/pull/3581
 [#3595]: https://github.com/labwc/labwc/pull/3595
+[#3600]: https://github.com/labwc/labwc/pull/3600
+[#3615]: https://github.com/labwc/labwc/pull/3615
+[#3616]: https://github.com/labwc/labwc/pull/3616
+[#3617]: https://github.com/labwc/labwc/pull/3617
+[#3625]: https://github.com/labwc/labwc/pull/3625
+[#3630]: https://github.com/labwc/labwc/pull/3630
+[#3631]: https://github.com/labwc/labwc/pull/3631

README.md

@@ -153,7 +153,7 @@ Build dependencies include:
 - meson, ninja, gcc/clang
 - wayland-protocols
 
-Disable xwayland with `meson -Dxwayland=disabled build/`
+Disable xwayland with `meson setup -Dxwayland=disabled build/`
 
 For OS/distribution specific details see [wiki].
 

src/buffer.c

@@ -95,6 +95,7 @@ buffer_adopt_cairo_surface(cairo_surface_t *surface)
 
 	buffer->surface = surface;
 	buffer->data = cairo_image_surface_get_data(buffer->surface);
+	assert(buffer->data);
 	buffer->format = DRM_FORMAT_ARGB8888;
 	buffer->stride = cairo_image_surface_get_stride(buffer->surface);
 	buffer->logical_width = width;
@@ -107,6 +108,12 @@ buffer_adopt_cairo_surface(cairo_surface_t *surface)
 struct lab_data_buffer *
 buffer_create_cairo(uint32_t logical_width, uint32_t logical_height, float scale)
 {
+	if (!logical_width || !logical_height) {
+		wlr_log(WLR_ERROR, "Failed to create cairo buffer of %ux%u: dimensions must be > 0",
+			logical_width, logical_height);
+		return NULL;
+	}
+
 	/* Create an image surface with the scaled size */
 	cairo_surface_t *surface =
 		cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
@@ -142,6 +149,7 @@ buffer_create_from_data(void *pixel_data, uint32_t width, uint32_t height,
 	buffer->logical_width = width;
 	buffer->logical_height = height;
 	buffer->data = pixel_data;
+	assert(buffer->data);
 	buffer->format = DRM_FORMAT_ARGB8888;
 	buffer->stride = stride;
 	buffer->surface = cairo_image_surface_create_for_data(
@@ -188,6 +196,10 @@ buffer_resize(struct lab_data_buffer *src_buffer, int width, int height,
 
 	struct lab_data_buffer *buffer =
 		buffer_create_cairo(width, height, scale);
+	if (!buffer) {
+		wlr_log(WLR_INFO, "Failed to resize buffer to %dx%d", width, height);
+		return NULL;
+	}
 	cairo_t *cairo = cairo_create(buffer->surface);
 
 	struct wlr_box container = {

src/common/font.c

@@ -82,6 +82,7 @@ font_buffer_create(struct lab_data_buffer **buffer, int max_width,
 	cairo_pattern_t *bg_pattern, double scale, bool use_markup)
 {
 	if (string_null_or_empty(text)) {
+		*buffer = NULL;
 		return;
 	}
 
@@ -91,6 +92,13 @@ font_buffer_create(struct lab_data_buffer **buffer, int max_width,
 		height = computed_height;
 	}
 
+	if (height <= 0 || width <= 0) {
+		wlr_log(WLR_INFO, "Refusing to create invisible font buffer of %dx%d",
+			width, height);
+		*buffer = NULL;
+		return;
+	}
+
 	*buffer = buffer_create_cairo(width, height, scale);
 	if (!*buffer) {
 		wlr_log(WLR_ERROR, "Failed to create font buffer");

src/scaled-buffer/scaled-font-buffer.c

@@ -29,7 +29,7 @@ _create_buffer(struct scaled_buffer *scaled_buffer, double scale)
 		&self->font, self->color, bg_pattern, scale, self->use_markup);
 
 	if (!buffer) {
-		wlr_log(WLR_ERROR, "font_buffer_create() failed");
+		wlr_log(WLR_INFO, "font_buffer_create() failed");
 	}
 
 	zfree_pattern(solid_bg_pattern);

src/xdg.c

@@ -621,7 +621,24 @@ xdg_toplevel_view_configure(struct view *view, struct wlr_box geo)
 	if (geo.width != view->pending.width
 			|| geo.height != view->pending.height) {
 		if (toplevel->base->initialized) {
-			serial = wlr_xdg_toplevel_set_size(toplevel, geo.width, geo.height);
+			/*
+			 * geo.{width,height} are checked here to guard against
+			 * an odd edge-case reported in #3608 which involves TTY
+			 * switching between labwc and Xfce running on X.Org on
+			 * another TTY. It is not yet clear what causes this,
+			 * but hitting wlroots assert() is not great, so let's
+			 * protect against it.
+			 *
+			 * Ref:
+			 * - https://github.com/labwc/labwc/issues/3608
+			 */
+			if (geo.width > 0 && geo.height > 0) {
+				serial = wlr_xdg_toplevel_set_size(toplevel,
+						geo.width, geo.height);
+			} else {
+				wlr_log(WLR_ERROR, "cannot set size %dx%d",
+					geo.width, geo.height);
+			}
 		} else {
 			/*
 			 * This may happen, for example, when a panel resizes because a