Hyprscrolling crash

[fabiokr]

Was playing with Hyprscrolling, and eventually it crashed while opening some windows:

--------------------------------------------
   Hyprland Crash Report
--------------------------------------------
I don't feel so good...

Hyprland received signal 6(ABRT)
Version: 967c3c7404d4fa00234e29c70df3e263386d2597
Tag: v0.52.1
Date: Sun Nov 9 23:31:36 2025
Flags:

Hyprland seems to be running with plugins. This crash might not be Hyprland's fault.
Plugins:
	hyprscrolling (Vaxry) 1.0


System info:
	System name: Linux
	Node name: motherbrain-ser8
	Release: 6.17.8-arch1-1
	Version: #1 SMP PREEMPT_DYNAMIC Fri, 14 Nov 2025 06:54:20 +0000

GPU:
	65:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] HawkPoint1 [1002:1900] (rev b3) (prog-if 00 [VGA controller])


os-release:
	NAME="Arch Linux"
	PRETTY_NAME="Arch Linux"
	ID=arch
	BUILD_ID=rolling
	ANSI_COLOR="38;2;23;147;209"
	HOME_URL="https://archlinux.org/"
	DOCUMENTATION_URL="https://wiki.archlinux.org/"
	SUPPORT_URL="https://bbs.archlinux.org/"
	BUG_REPORT_URL="https://gitlab.archlinux.org/groups/archlinux/-/issues"
	PRIVACY_POLICY_URL="https://terms.archlinux.org/docs/privacy-policy/"
	LOGO=archlinux-logo

Libraries:
Hyprgraphics: built against 0.4.0, system has 0.4.0
Hyprutils: built against 0.10.3, system has 0.10.3
Hyprcursor: built against 0.1.13, system has 0.1.13
Hyprlang: built against 0.6.6, system has 0.6.6
Aquamarine: built against 0.10.0, system has 0.10.0

Backtrace:
	# | Hyprland(_Z12getBacktracev+0x61) [0x55a4b3263281]
		getBacktrace()
		??:?
	#1 | Hyprland(_ZN14NCrashReporter18createAndSaveCrashEi+0xcd6) [0x55a4b318f126]
		NCrashReporter::createAndSaveCrash(int)
		??:?
	#2 | Hyprland(+0x2b0a02) [0x55a4b30f0a02]
		_start
		??:?
	#3 | /usr/lib/libc.so.6(+0x3e4d0) [0x7f09a183e4d0]
		??
		??:0
	#4 | /usr/lib/libc.so.6(+0x9890c) [0x7f09a189890c]
		??
		??:0
	#5 | /usr/lib/libc.so.6(gsignal+0x20) [0x7f09a183e3a0]
		??
		??:0
	#6 | /usr/lib/libc.so.6(abort+0x26) [0x7f09a182557a]
		??
		??:0
	#7 | /usr/lib/libstdc++.so.6(+0x9a41f) [0x7f09a1c9a41f]
		??
		??:0
	#8 | /var/cache/hyprpm/fabio/hyprland-plugins/hyprscrolling.so(_ZSt5clampIdERKT_S2_S2_S2_+0x55) [0x7f093268642e]
		??
		??:0
	#9 | /var/cache/hyprpm/fabio/hyprland-plugins/hyprscrolling.so(_ZN14SWorkspaceData6fitColEN9Hyprutils6Memory14CSharedPointerI11SColumnDataEE+0x2ad) [0x7f09326648c7]
		??
		??:0
	#1 | /var/cache/hyprpm/fabio/hyprland-plugins/hyprscrolling.so(_ZN16CScrollingLayout21onWindowCreatedTilingEN9Hyprutils6Memory14CSharedPointerI7CWindowEE10eDirection+0x7fb) [0x7f093266867b]
		??
		??:0
	#11 | Hyprland(_ZN11IHyprLayout15onWindowCreatedEN9Hyprutils6Memory14CSharedPointerI7CWindowEE10eDirection+0x3cc) [0x55a4b32bb63c]
		IHyprLayout::onWindowCreated(Hyprutils::Memory::CSharedPointer<CWindow>, eDirection)
		??:?
	#12 | Hyprland(_ZN6Events18listener_mapWindowEPvS0_+0x3828) [0x55a4b3256a08]
		Events::listener_mapWindow(void*, void*)
		??:?
	#13 | /usr/lib/libhyprutils.so.9(_ZN9Hyprutils6Signal15CSignalListener12emitInternalEPv+0x2d) [0x7f09a261c53d]
		??
		??:0
	#14 | /usr/lib/libhyprutils.so.9(_ZN9Hyprutils6Signal11CSignalBase12emitInternalEPv+0x19a) [0x7f09a261c79a]
		??
		??:0
	#15 | /usr/lib/libhyprutils.so.9(_ZN9Hyprutils6Signal15CSignalListener12emitInternalEPv+0x2d) [0x7f09a261c53d]
		??
		??:0
	#16 | /usr/lib/libhyprutils.so.9(_ZN9Hyprutils6Signal11CSignalBase12emitInternalEPv+0x19a) [0x7f09a261c79a]
		??
		??:0
	#17 | Hyprland(+0x74b701) [0x55a4b358b701]
		CWLSurfaceResource::findFirstPreorder(std::function<bool (Hyprutils::Memory::CSharedPointer<CWLSurfaceResource>)>)
		??:?
	#18 | Hyprland(_ZN18CWLSurfaceResource8bfHelperERKSt6vectorIN9Hyprutils6Memory14CSharedPointerIS_EESaIS4_EESt8functionIFvS4_RKNS1_4Math8Vector2DEPvEESE_+0x6f2) [0x55a4b358ec42]
		CWLSurfaceResource::bfHelper(std::vector<Hyprutils::Memory::CSharedPointer<CWLSurfaceResource>, std::allocator<Hyprutils::Memory::CSharedPointer<CWLSurfaceResource> > > const&, std::function<void (Hyprutils::Memory::CSharedPointer<CWLSurfaceResource>, Hyprutils::Math::Vector2D const&, void*)>, void*)
		??:?
	#19 | Hyprland(_ZN18CWLSurfaceResource12breadthfirstESt8functionIFvN9Hyprutils6Memory14CSharedPointerIS_EERKNS1_4Math8Vector2DEPvEES9_+0xf9) [0x55a4b358f449]
		CWLSurfaceResource::breadthfirst(std::function<void (Hyprutils::Memory::CSharedPointer<CWLSurfaceResource>, Hyprutils::Math::Vector2D const&, void*)>, void*)
		??:?
	#2 | Hyprland(_ZN18CWLSurfaceResource11commitStateER13SSurfaceState+0x192) [0x55a4b3594712]
		CWLSurfaceResource::commitState(SSurfaceState&)
		??:?
	#21 | Hyprland(_ZN18CSurfaceStateQueue10tryProcessEv+0x6a) [0x55a4b35cf6ba]
		CSurfaceStateQueue::tryProcess()
		??:?
	#22 | Hyprland(+0x74e21c) [0x55a4b358e21c]
		CWLSurfaceResource::scheduleState(Hyprutils::Memory::CWeakPointer<SSurfaceState>)
		??:?
	#23 | Hyprland(_ZN17CEventLoopManager12onFdReadableEPNS_15SReadableWaiterE+0xdf) [0x55a4b337520f]
		CEventLoopManager::onFdReadable(CEventLoopManager::SReadableWaiter*)
		??:?
	#24 | Hyprland(+0x53537f) [0x55a4b337537f]
		CEventLoopManager::onFdReadable(CEventLoopManager::SReadableWaiter*)
		??:?
	#25 | /usr/lib/libwayland-server.so.0(wl_event_loop_dispatch+0x1d2) [0x7f09a24e3182]
		??
		??:0
	#26 | /usr/lib/libwayland-server.so.0(wl_display_run+0x37) [0x7f09a24e5297]
		??
		??:0
	#27 | Hyprland(_ZN17CEventLoopManager9enterLoopEv+0x291) [0x55a4b33763c1]
		CEventLoopManager::enterLoop()
		??:?
	#28 | Hyprland(main+0x1234) [0x55a4b30673f4]
		main
		??:?
	#29 | /usr/lib/libc.so.6(+0x27635) [0x7f09a1827635]
		??
		??:0
	#3 | /usr/lib/libc.so.6(__libc_start_main+0x89) [0x7f09a18276e9]
		??
		??:0
	#31 | Hyprland(_start+0x25) [0x55a4b30efe85]
		_start
		??:?


Log tail:
[LOG] Searching for matching rules for google-chrome (title: New Incognito Tab - Google Chrome)
[LOG] Window rule suppressevent maximize -> suppressevent maximize, class:.* matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule opacity 0.97 0.9 -> opacity 0.97 0.9, class:.* matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule tag +chromium-based-browser -> tag +chromium-based-browser, class:((google-)?[cC]hrom(e|ium)|[bB]rave-browser|[mM]icrosoft-edge|Vivaldi-stable|helium) matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule tile -> tile, tag:chromium-based-browser matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule opacity 1 0.97 -> opacity 1 0.97, tag:chromium-based-browser matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule workspace 2 -> workspace 2, class:^(google-chrome)$ matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Layout predicts size [Vector2D: x: 0, y: 0] for [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] [CXDGSurfaceResource] xdg_surface 55a4ec224fe0 requests geometry 0x0 1300x1074
[LOG] [CXDGActivationToken] assigned new xdg-activation token 756f3ab8-e1ed-4d89-9085-7bdfe2b19ff0
[LOG] [CXDGSurfaceResource] xdg_surface 55a4ec224fe0 requests geometry 0x0 1300x1074
[LOG] [CXDGActivationToken] assigned new xdg-activation token fe8f3120-13b7-4d8e-996f-dc9fa9fdbdb2
[LOG] cursorImage request: shape 1 -> default
[LOG] cursorImage request: shape 4 -> pointer
[LOG] cursorImage request: shape 1 -> default
[LOG] [CLinuxDMABUFParamsResource] Creating a dmabuf, with id 130: size [Vector2D: x: 1792, y: 1536], fmt AB24, planes 3
[LOG] [CLinuxDMABUFParamsResource]  | plane 0: mod 144115188348910340 fd 175 stride 7168 offset 0
[LOG] [CLinuxDMABUFParamsResource]  | plane 1: mod 144115188348910340 fd 217 stride 2048 offset 11010048
[LOG] [CLinuxDMABUFParamsResource]  | plane 2: mod 144115188348910340 fd 249 stride 2048 offset 11059200
[LOG] [CDRMSyncobjManagerResource] New linux_drm_timeline at 55a4edcc78f0
[LOG] [CXDGSurfaceResource] xdg_surface 55a4ec224fe0 requests geometry 10x10 1280x1054
[LOG] Ignoring CWindow::activate focus/warp, window is not mapped yet.
[LOG] [CDRMSyncobjManagerResource] New linux_drm_timeline at 55a4edc8c950
[LOG] [CDRMSyncobjManagerResource] New linux_syncobj at 55a4edc277c0 for surface 55a4edaf1970
[LOG] [CWLCompositorResource] New wl_region with id 185 at 55a4ed624270
[LOG] [CWLCompositorResource] New wl_region with id 134 at 55a4edb861c0
[LOG] Hyprctl: new connection from pid 4922
[LOG] Hyprctl: new connection from pid 4922
[LOG] Searching for matching rules for google-chrome (title: New Incognito Tab - Google Chrome)
[LOG] Window rule suppressevent maximize -> suppressevent maximize, class:.* matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule opacity 0.97 0.9 -> opacity 0.97 0.9, class:.* matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule tag +chromium-based-browser -> tag +chromium-based-browser, class:((google-)?[cC]hrom(e|ium)|[bB]rave-browser|[mM]icrosoft-edge|Vivaldi-stable|helium) matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule tile -> tile, tag:chromium-based-browser matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule opacity 1 0.97 -> opacity 1 0.97, tag:chromium-based-browser matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Window rule workspace 2 -> workspace 2, class:^(google-chrome)$ matched [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"]
[LOG] Rule workspace matched by [Window 55a4edb164d0: title: "New Incognito Tab - Google Chrome"], workspace 2, class:^(google-chrome)$ applied.
[LOG] [scrolling] new window 55a4edb164d0, droppingColumn: 55a4edc4f460, columns before: 1

[fabiokr]

AI Suggested this fix:

diff --git a/hyprscrolling/Scrolling.cpp b/hyprscrolling/Scrolling.cpp
index 6aa8a16..27db179 100644
--- a/hyprscrolling/Scrolling.cpp
+++ b/hyprscrolling/Scrolling.cpp
@@ -236,7 +236,9 @@ void SWorkspaceData::fitCol(SP<SColumnData> c) {
         if (COL != c)
             currentLeft += ITEM_WIDTH;
         else {
-            leftOffset = std::clamp((double)leftOffset, currentLeft - USABLE.w + ITEM_WIDTH, currentLeft);
+            const double minOffset = currentLeft - USABLE.w + ITEM_WIDTH;
+            const double maxOffset = currentLeft;
+            leftOffset = std::clamp((double)leftOffset, std::min(minOffset, maxOffset), std::max(minOffset, maxOffset));
             return;
         }
     }

2. Demangling the C++ Symbols
The mangled symbols tell us:

Frame #8: _ZSt5clampIdERKT_S2_S2_S2_ → std::clamp<double> - The crash is inside std::clamp
Frame #9: _ZN14SWorkspaceData6fitColEN9Hyprutils6Memory14CSharedPointerI11SColumnDataEE → SWorkspaceData::fitCol(...) - This function called std::clamp
Frame #10: _ZN16CScrollingLayout21onWindowCreatedTilingEN9Hyprutils6Memory14CSharedPointerI7CWindowEE10eDirection → CScrollingLayout::onWindowCreatedTiling(...)
3. Understanding the Call Chain
The crash happened when:

A new window (Chrome) was created → onWindowCreatedTiling() was called
Which called → fitCol()
Which called → std::clamp()
Which aborted due to invalid preconditions
4. Why std::clamp Crashes
From the error message in the backtrace:

#6 | /usr/lib/libc.so.6(abort+0x26)
std::clamp has a precondition: min <= max. If violated, it calls std::abort() in debug builds or with assertions enabled.