Elwira : Failed to load data

[wargreen]

When launching Elwira and opening it in my web browser, i got Failed to load data and i can't add a plugin.

In the log :

2025/10/27 21:50:59 links.go:187: =====================================
2025/10/27 21:50:59 links.go:188: == Hanterar grupp: master
2025/10/27 21:50:59 links.go:193: -- Sorterad grupp enligt step --
2025/10/27 21:50:59 links.go:195:   Step 0: master-0
2025/10/27 21:50:59 links.go:181: Steg 0: master-0 → ToL=, ToR=
2025/10/27 21:50:59 server.go:3640: http: panic serving 127.0.0.1:48774: runtime error: index out of range [1] with length 1
goroutine 243 [running]:
net/http.(*conn).serve.func1()
	/usr/lib/go-1.24/src/net/http/server.go:1947 +0xbe
panic({0x859bc0?, 0xc0001ac000?})
	/usr/lib/go-1.24/src/runtime/panic.go:792 +0x132
main.parseLink({0xc0003fe0e0?, 0xc0001550b8?}, {0x0, 0x0})
	/home/wargreen/gitOpts/elvira/elwira/links.go:88 +0x145
main.buildBEHfromG({0xc000648050, 0x1, 0x1?}, {0x0, 0x0})
	/home/wargreen/gitOpts/elvira/elwira/links.go:67 +0x15d
main.processGroup({0xc000155020, 0x6}, {0xc000648050, 0x1, 0x1}, {0xc0002aa008, 0xc, 0x6511540b198eb674?}, {0x0, 0x0}, ...)
	/home/wargreen/gitOpts/elvira/elwira/links.go:200 +0x433
main.linksHandler({0x10?, 0x47c172?}, 0xc00005db38?)
	/home/wargreen/gitOpts/elvira/elwira/links.go:267 +0x872
net/http.HandlerFunc.ServeHTTP(0xc312a0?, {0x945c58?, 0xc000420000?}, 0x6cd056?)
	/usr/lib/go-1.24/src/net/http/server.go:2294 +0x29
net/http.(*ServeMux).ServeHTTP(0x473419?, {0x945c58, 0xc000420000}, 0xc00034a000)
	/usr/lib/go-1.24/src/net/http/server.go:2822 +0x1c4
net/http.serverHandler.ServeHTTP({0xc0002f4030?}, {0x945c58?, 0xc000420000?}, 0x6?)
	/usr/lib/go-1.24/src/net/http/server.go:3301 +0x8e
net/http.(*conn).serve(0xc00013e3f0, {0x9461e8, 0xc00010d6e0})
	/usr/lib/go-1.24/src/net/http/server.go:2102 +0x625
created by net/http.(*Server).Serve in goroutine 10
	/usr/lib/go-1.24/src/net/http/server.go:3454 +0x485
2025/10/27 21:50:59 server.go:3640: http: panic serving 127.0.0.1:48794: interface conversion: interface {} is string, not float64
goroutine 219 [running]:
net/http.(*conn).serve.func1()
	/usr/lib/go-1.24/src/net/http/server.go:1947 +0xbe
panic({0x81abe0?, 0xc000214210?})
	/usr/lib/go-1.24/src/runtime/panic.go:792 +0x132
main.NodesHandler({0x945c58, 0xc0004200e0}, 0xc0004d2b38?)
	/home/wargreen/gitOpts/elvira/elwira/pw.go:185 +0xa1e
net/http.HandlerFunc.ServeHTTP(0xc312a0?, {0x945c58?, 0xc0004200e0?}, 0x6cd056?)
	/usr/lib/go-1.24/src/net/http/server.go:2294 +0x29
net/http.(*ServeMux).ServeHTTP(0x473419?, {0x945c58, 0xc0004200e0}, 0xc00034a140)
	/usr/lib/go-1.24/src/net/http/server.go:2822 +0x1c4
net/http.serverHandler.ServeHTTP({0xc0001fe3c0?}, {0x945c58?, 0xc0004200e0?}, 0x6?)
	/usr/lib/go-1.24/src/net/http/server.go:3301 +0x8e
net/http.(*conn).serve(0xc0002fc120, {0x9461e8, 0xc00010d6e0})
	/usr/lib/go-1.24/src/net/http/server.go:2102 +0x625
created by net/http.(*Server).Serve in goroutine 10
	/usr/lib/go-1.24/src/net/http/server.go:3454 +0x485
2025/10/27 21:50:59 server.go:3640: http: panic serving 127.0.0.1:48808: interface conversion: interface {} is string, not float64
goroutine 244 [running]:
net/http.(*conn).serve.func1()
	/usr/lib/go-1.24/src/net/http/server.go:1947 +0xbe
panic({0x81abe0?, 0xc0002517a0?})
	/usr/lib/go-1.24/src/runtime/panic.go:792 +0x132
main.NodesHandler({0x945c58, 0xc0004201c0}, 0xc0004d2b38?)
	/home/wargreen/gitOpts/elvira/elwira/pw.go:185 +0xa1e
net/http.HandlerFunc.ServeHTTP(0xc312a0?, {0x945c58?, 0xc0004201c0?}, 0x6cd056?)
	/usr/lib/go-1.24/src/net/http/server.go:2294 +0x29
net/http.(*ServeMux).ServeHTTP(0x473419?, {0x945c58, 0xc0004201c0}, 0xc00034a280)
	/usr/lib/go-1.24/src/net/http/server.go:2822 +0x1c4
net/http.serverHandler.ServeHTTP({0xc000269b00?}, {0x945c58?, 0xc0004201c0?}, 0x6?)
	/usr/lib/go-1.24/src/net/http/server.go:3301 +0x8e
net/http.(*conn).serve(0xc0002fc2d0, {0x9461e8, 0xc00010d6e0})
	/usr/lib/go-1.24/src/net/http/server.go:2102 +0x625
created by net/http.(*Server).Serve in goroutine 10
	/usr/lib/go-1.24/src/net/http/server.go:3454 +0x485

OS : Debian SID
Build with commit : a18b862

[helander]

This is hard to debug without knowing more about the instance you are trying to create and the plugin.

[wargreen]

What do you mean by Instance ?

I have this issue with env GDK_BACKEND=x11 elvira master https://github.com/trummerschlunk/master_me. I can see the plugin in my pipewire graph, but "Failed to load data" and the go server issue in elwira.

After further research, i got another error with x42 and LSP plugins :

lv2_path [/home/wargreen/.lv2:/home/wargreen/.lv2-plugins]
display [:0]
[I][17:52:43.923561] pw.context   | [      pipewire.c:  581 pw_init()] version 1.4.9
home [/home/wargreen]
Starting engine group master step 0 plugin http://gareus.org/oss/lv2/fil4#stereo preset (null)

[E][17:52:43.924275] default      | [          host.c:   63 load_plugin()] Host can't load plugin http://gareus.org/oss/lv2/fil4#stereo
fish: Job 1, 'env GDK_BACKEND=x11 elvira mast…' terminated by signal SIGSEGV (Address boundary error)

I don't think that is related to Xwayland because i've already used the GDK_BACKEND on another software without issues. But all soft are different, so.... :)