Move to JuliaGraphics caused missing Qt plugin?

[veddox]

Hi everyone,

I've just started using QML.jl, and am completely new to Qt & QML, so I may be completely wrong here. But is it possible that the move to JuliaGraphics broke something with the package?

I've been running QML.jl from the main branch, as recommended here. Things were fine until yesterday afternoon (CEST), when I reinstalled the package, and since then nothing has been working. I always get the following error when importing QML.jl:

julia> using QML
qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: linuxfb, offscreen, eglfs, minimalegl, vnc, minimal, vkkhrdisplay.

Full error message

julia> using QML qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in "" This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: linuxfb, offscreen, eglfs, minimalegl, vnc, minimal, vkkhrdisplay. [76092] signal (6.-6): Aborted in expression starting at REPL[4]:1 pthread_kill at /lib/x86_64-linux-gnu/libc.so.6 (unknown line) raise at /lib/x86_64-linux-gnu/libc.so.6 (unknown line) abort at /lib/x86_64-linux-gnu/libc.so.6 (unknown line) _Z6qAbortv at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Core.so.6 (unknown line) _ZNK14QMessageLogger5fatalEPKcz at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Core.so.6 (unknown line) _ZL13init_platformRK7QStringS1_S1_RiPPc.cold at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Gui.so (unknown line) _ZN22QGuiApplicationPrivate25createPlatformIntegrationEv at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Gui.so (unknown line) _ZN22QGuiApplicationPrivate21createEventDispatcherEv at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Gui.so (unknown line) _ZN23QCoreApplicationPrivate4initEv at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Core.so.6 (unknown line) _ZN22QGuiApplicationPrivate4initEv at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Gui.so (unknown line) _ZN15QGuiApplicationC1ERiPPci at /home/user/.julia/artifacts/0a970ac8426a9e414db626eb96c788b0d592369f/lib/libQt6Gui.so (unknown line) _ZNSt17_Function_handlerIFN5jlcxx10BoxedValueI15QGuiApplicationEERiPPcEZNS0_6Module11constructorIS2_JS4_S6_EEEvP14_jl_datatype_tbEUlS4_S6_E_E9_M_invokeERKSt9_Any_dataS4_OS6_ at /home/user/.julia/artifacts/f1b409a622d1a93db281f51631bc9dbcd42c72bc/lib/libjlqml.so (unknown line) _ZN5jlcxx6detail11CallFunctorINS_10BoxedValueI15QGuiApplicationEEJRiPPcEE5applyEPKvNS_13WrappedCppPtrESB_ at /home/user/.julia/artifacts/f1b409a622d1a93db281f51631bc9dbcd42c72bc/lib/libjlqml.so (unknown line) QGuiApplication at /home/user/.julia/packages/CxxWrap/aXNBY/src/CxxWrap.jl:624 unknown function (ip: 0x7fd541ee92c6) _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 __init__ at /home/user/.julia/packages/QML/dFnTL/src/QML.jl:151 jfptr___init___1862 at /home/user/.julia/compiled/v1.9/QML/JLkMo_p2KP2.so (unknown line) _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 jl_apply at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/julia.h:1880 [inlined] jl_module_run_initializer at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/toplevel.c:75 ijl_init_restored_modules at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/module.c:982 register_restored_modules at ./loading.jl:1115 _include_from_serialized at ./loading.jl:1061 _require_search_from_serialized at ./loading.jl:1506 _require at ./loading.jl:1783 _require_prelocked at ./loading.jl:1660 macro expansion at ./loading.jl:1648 [inlined] macro expansion at ./lock.jl:267 [inlined] require at ./loading.jl:1611 jfptr_require_45889.clone_1 at /usr/local/lib/julia/lib/julia/sys.so (unknown line) _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 jl_apply at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/julia.h:1880 [inlined] call_require at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/toplevel.c:466 [inlined] eval_import_path at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/toplevel.c:503 jl_toplevel_eval_flex at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/toplevel.c:731 jl_toplevel_eval_flex at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/toplevel.c:856 ijl_toplevel_eval_in at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/toplevel.c:971 eval at ./boot.jl:370 [inlined] eval_user_input at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:153 repl_backend_loop at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:249 #start_repl_backend#46 at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:234 start_repl_backend at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:231 _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 #run_repl#59 at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:379 run_repl at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:365 jfptr_run_repl_60908.clone_1 at /usr/local/lib/julia/lib/julia/sys.so (unknown line) _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 #1017 at ./client.jl:421 jfptr_YY.1017_36106.clone_1 at /usr/local/lib/julia/lib/julia/sys.so (unknown line) _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 jl_apply at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/julia.h:1880 [inlined] jl_f__call_latest at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/builtins.c:774 #invokelatest#2 at ./essentials.jl:819 [inlined] invokelatest at ./essentials.jl:816 [inlined] run_main_repl at ./client.jl:405 exec_options at ./client.jl:322 _start at ./client.jl:522 jfptr__start_40034.clone_1 at /usr/local/lib/julia/lib/julia/sys.so (unknown line) _jl_invoke at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2758 [inlined] ijl_apply_generic at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/gf.c:2940 jl_apply at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/julia.h:1880 [inlined] true_main at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/jlapi.c:573 jl_repl_entrypoint at /cache/build/default-amdci5-5/julialang/julia-release-1-dot-9/src/jlapi.c:717 main at julia (unknown line) unknown function (ip: 0x7fd543229d8f) __libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line) unknown function (ip: 0x4010b8) Allocations: 4843227 (Pool: 4838808; Big: 4419); GC: 8 fish: Job 1, 'julia' terminated by signal SIGABRT (Abort)

At first I thought this was a local problem, but I've set up a fresh Julia+QML.jl install on a different Linux machine, and gotten the same crash. Is it at all possible that this is related to the migration? If not, any ideas what might cause this?

[barche]

No, this is the upgrade to Qt6.5 in Yggdrasil, downgrading Qt6Base_jll to 6.4.2 should work around this until I can rebuild the package.

[veddox]

Oh, wonderful - thank you for the quick response! Yes, that fixed it.

I suggest leaving this issue open until the package has been rebuilt, in case others run into the same problem.

[ufechner7]

Perhaps this can be closed now that 0.8 is released?