Eventloop initialization failure - Failed to open input method #636

moragtong · 2018-08-23T15:02:31Z

Got this on Debian Buster.

thread 'main' panicked at 'Failed to open input method: PotentialInputMethods {
    xmodifiers: None,
    fallbacks: [
        PotentialInputMethod {
            name: "@im=local",
            successful: Some(
                false
            )
        },
        PotentialInputMethod {
            name: "@im=",
            successful: Some(
                false
            )
        }
    ],
    _xim_servers: Err(
        GetPropertyError(
            TypeMismatch(
                0
            )
        )
    )
}', /home/michael/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.17.2/src/platform/linux/x11/mod.rs:85:17

Managed to fix it by commenting line 81 (setlocale) in the file mentioned in the log.

Edit: It seems that setting the LC_CTYPE locale to an empty c string is invalid, using b"C\0" worked.
Using LC_ALL doesn't work either with an empty string, at least on my system.

Update: It seems that the problem has something to do with my etc/default/locale being set to en_IL.UTF-8. I changed it to en_US.UTF-8 and it worked.

The text was updated successfully, but these errors were encountered:

elichai · 2019-05-23T13:06:25Z

Same here. changing from LANG=en_IL.UTF-8 to LANG=en_US.UTF-8 fixes this error:

thread 'main' panicked at 'Failed to open input method: PotentialInputMethods {
    xmodifiers: None,
    fallbacks: [
        PotentialInputMethod {
            name: "@im=local",
            successful: Some(
                false
            )
        },
        PotentialInputMethod {
            name: "@im=",
            successful: Some(
                false
            )
        }
    ],
    _xim_servers: Err(
        GetPropertyError(
            TypeMismatch(
                0
            )
        )
    )
}', /build/alacritty-eHHw83/alacritty-0.3.2~1556145865~18.04~4ba1771/vendor/winit/src/platform/linux/x11/mod.rs:92:17
note: Run with `RUST_BACKTRACE=1` for a backtrace.

Grissess · 2019-05-26T04:59:45Z

Same thing here; encountered within alacritty as above. My default LANG is en_US.utf8@grissess (mostly en_US plus ISO8601 datetime), which resulted in exactly the error above. Using LANG=en_US.utf8 fixes it.

The alacritty issue ref'd above has other people changing locales and getting it working, too. Is there any way to work around this without changing LANG?

goddessfreya · 2019-05-26T07:26:48Z

I'd love to investigate this, but I cannot reproduce it.

Tried adding en_IL.UTF-8 to my /etc/local.gen, rebuilding my locals with local-gen, then changing my default to en_IL.UTF-8 in /etc/local.conf, then unset LANG, then source /etc/profile.d/locale.sh, to no avail.

elichai · 2019-05-26T07:34:12Z

Run echo $LANG before you run to make sure that the lang is really the IL one.

Btw you can just export it and it should also do the trick.

Grissess · 2019-05-26T07:39:49Z

Even if you're having trouble reproducing it there, I'll gladly proffer my system for test builds and theories as needed.

(To follow up what elichai said, I just did the cross-LANG test with LANG=en_US.utf8 alacritty verbatim.)

goddessfreya · 2019-05-26T08:11:52Z

https://i.imgur.com/i61KD4I.png :/

It would be useful to know the values of inner and input_method on successful runs, and on failed runs.
https://github.com/rust-windowing/winit/blob/master/src/platform/linux/x11/ime/mod.rs#L60

The values of local_modifiers and im would also be of interest: https://github.com/rust-windowing/winit/blob/master/src/platform/linux/x11/ime/input_method.rs#L20

So would printing out input_method above these two places: https://github.com/rust-windowing/winit/blob/master/src/platform/linux/x11/ime/input_method.rs#L264 https://github.com/rust-windowing/winit/blob/master/src/platform/linux/x11/ime/input_method.rs#L274

EDIT:
I'm available 6pm-10pm Tues to Friday UTC-6 on #Glutin:matrix.org, if any of you want to work this issue out together.

EpicatSupercell · 2020-02-05T14:03:54Z

Using version 0.19.5
Failed run (using en_IL.utf8):

src/platform/linux/x11/ime/input_method.rs:274 input_method: PotentialInputMethod { name: "@im=local", successful: None }
src/platform/linux/x11/ime/input_method.rs:20 locale_modifiers: "@im=local"
src/platform/linux/x11/ime/input_method.rs:26 XSetLocaleModifiers: 0x0
src/platform/linux/x11/ime/input_method.rs:34 im: 0x0
src/platform/linux/x11/ime/input_method.rs:274 input_method: PotentialInputMethod { name: "@im=", successful: None }
src/platform/linux/x11/ime/input_method.rs:20 locale_modifiers: "@im="
src/platform/linux/x11/ime/input_method.rs:26 XSetLocaleModifiers: 0x0
src/platform/linux/x11/ime/input_method.rs:34 im: 0x0
src/platform/linux/x11/ime/mod.rs:60 input_method: Failure
src/platform/linux/x11/ime/mod.rs:60 inner: ImeInner { xconn: 0x55834ba884d0, im: 0x0, potential_input_methods: PotentialInputMethods { xmodifiers: None, fallbacks: [PotentialInputMethod { name: "@im=local", successful: Some(false) }, PotentialInputMethod { name: "@im=", successful: Some(false) }], _xim_servers: Err(GetPropertyError(TypeMismatch(0))) }, contexts: {}, destroy_callback: XIMCallback { client_data: 0x55834baa0290, callback: Some(0x55834acbee80) }, is_destroyed: false, is_fallback: false }

Successful run (using en_US.utf8):

src/platform/linux/x11/ime/input_method.rs:274 input_method: PotentialInputMethod { name: "@im=local", successful: None }
src/platform/linux/x11/ime/input_method.rs:20 locale_modifiers: "@im=local"
src/platform/linux/x11/ime/input_method.rs:26 XSetLocaleModifiers: 0x557ccb507280
src/platform/linux/x11/ime/input_method.rs:34 im: 0x557ccb5072a0
src/platform/linux/x11/ime/mod.rs:60 input_method: Fallback(InputMethod { im: 0x557ccb5072a0, name: "@im=local" })
src/platform/linux/x11/ime/mod.rs:60 inner: ImeInner { xconn: 0x557ccb4c44d0, im: 0x0, potential_input_methods: PotentialInputMethods { xmodifiers: None, fallbacks: [PotentialInputMethod { name: "@im=local", successful: Some(true) }, PotentialInputMethod { name: "@im=", successful: None }], _xim_servers: Err(GetPropertyError(TypeMismatch(0))) }, contexts: {}, destroy_callback: XIMCallback { client_data: 0x557ccb4dc490, callback: Some(0x557cc9a0be80) }, is_destroyed: false, is_fallback: false }

goddessfreya · 2020-02-06T03:56:35Z

Can you test against winit master?

EpicatSupercell · 2020-02-09T11:21:01Z

Same with master (on February 9, 2020)
Failed run (using en_IL.utf8)

src/platform_impl/linux/x11/ime/input_method.rs:268 input_method: PotentialInputMethod { name: "@im=local", successful: None }
src/platform_impl/linux/x11/ime/input_method.rs:18 locale_modifiers: "@im=local"
src/platform_impl/linux/x11/ime/input_method.rs:25 XSetLocaleModifiers: 0x0
src/platform_impl/linux/x11/ime/input_method.rs:27 im: 0x0
src/platform_impl/linux/x11/ime/input_method.rs:268 input_method: PotentialInputMethod { name: "@im=", successful: None }
src/platform_impl/linux/x11/ime/input_method.rs:18 locale_modifiers: "@im="
src/platform_impl/linux/x11/ime/input_method.rs:25 XSetLocaleModifiers: 0x0
src/platform_impl/linux/x11/ime/input_method.rs:27 im: 0x0
src/platform_impl/linux/x11/ime/mod.rs:65 input_method: Failure
src/platform_impl/linux/x11/ime/mod.rs:65 inner: ImeInner { xconn: 0x56288127e090, im: 0x0, potential_input_methods: PotentialInputMethods { xmodifiers: None, fallbacks: [PotentialInputMethod { name: "@im=local", successful: Some(false) }, PotentialInputMethod { name: "@im=", successful: Some(false) }], _xim_servers: Err(GetPropertyError(TypeMismatch(0))) }, contexts: {}, destroy_callback: XIMCallback { client_data: 0x5628812963b0, callback: Some(0x56287f945540) }, is_destroyed: false, is_fallback: false }

Successful run (using en_US.utf8)

src/platform_impl/linux/x11/ime/input_method.rs:268 input_method: PotentialInputMethod { name: "@im=local", successful: None }
src/platform_impl/linux/x11/ime/input_method.rs:18 locale_modifiers: "@im=local"
src/platform_impl/linux/x11/ime/input_method.rs:25 XSetLocaleModifiers: 0x55cfb734f5f0
src/platform_impl/linux/x11/ime/input_method.rs:27 im: 0x55cfb734f610
src/platform_impl/linux/x11/ime/mod.rs:65 input_method: Fallback(InputMethod { im: 0x55cfb734f610, name: "@im=local" })
src/platform_impl/linux/x11/ime/mod.rs:65 inner: ImeInner { xconn: 0x55cfb730c090, im: 0x0, potential_input_methods: PotentialInputMethods { xmodifiers: None, fallbacks: [PotentialInputMethod { name: "@im=local", successful: Some(true) }, PotentialInputMethod { name: "@im=", successful: None }], _xim_servers: Err(GetPropertyError(TypeMismatch(0))) }, contexts: {}, destroy_callback: XIMCallback { client_data: 0x55cfb73242f0, callback: Some(0x55cfb6e6c540) }, is_destroyed: false, is_fallback: false }

This restores default portable 'C' locale when target locale is unsupported by X11 backend (Xlib). When target locale is unsupported by X11, some locale-dependent Xlib functions like `XSetLocaleModifiers` fail or have no effect triggering later failures and panics. When target locale is not valid, `setLocale` should normally leave the locale unchanged (`setLocale` returns 'C'). However, in some situations, locale is accepted by `setLocale` (`setLocale` returns the new locale) but the accepted locale is unsupported by Xlib (`XSupportsLocale` returns `false`). Fix rust-windowing#636

gentooboontoo · 2020-02-09T20:04:12Z

As far as I understand, it seems the initialization is failing (at least on my system) because my current locale (C.utf8) is accepted by setLocale:

winit/src/platform_impl/linux/x11/mod.rs

Line 108 in 96df858

setlocale(LC_CTYPE, b"\0".as_ptr() as *const _);

)
but is refused by X11 (XSetLocaleModifiers returns NULL):

winit/src/platform_impl/linux/x11/ime/input_method.rs

Line 25 in 96df858

(xconn.xlib.XSetLocaleModifiers)(locale_modifiers.as_ptr());

If I set my locale with LANG=C.UTF-8, the problem disappears for a reason unknown to me.

I have made a PR (#1445) which does not fix the root problem (setLocale / X11 discrepancy) but which prevents winit initialization from failing with an "invalid" locale (more details in the PR).

This restores default portable 'C' locale when target locale is unsupported by X11 backend (Xlib). When target locale is unsupported by X11, some locale-dependent Xlib functions like `XSetLocaleModifiers` fail or have no effect triggering later failures and panics. When target locale is not valid, `setLocale` should normally leave the locale unchanged (`setLocale` returns 'C'). However, in some situations, locale is accepted by `setLocale` (`setLocale` returns the new locale) but the accepted locale is unsupported by Xlib (`XSupportsLocale` returns `false`). Fix #636

sshaikh · 2021-05-19T17:29:53Z

Arrived here via alacritty: alacritty/alacritty#5153

Setting LANG doesn't appear to work for me.

EDIT: I fixed this by reverting some custom pacman config (Arch). See above issue for more details.

francesca64 added B - bug Dang, that shouldn't have happened DS - x11 C - needs investigation Issue must be confirmed and researched labels Aug 23, 2018

francesca64 mentioned this issue Sep 20, 2018

Failed to open input method alacritty/alacritty#1574

Closed

goddessfreya added the P - high Vital to have label May 26, 2019

goddessfreya added the H - good first issue Ideal for new contributors label May 26, 2019

goddessfreya added Contributer Push Issue and removed Contributer Push Issue labels Jun 20, 2019

d10v mentioned this issue Aug 21, 2019

Alacritty panic at start when en_DK locale is used alacritty/alacritty#2553

Closed

gentooboontoo mentioned this issue Feb 9, 2020

Ignore locale if unsupported by X11 backend #1445

Merged

8 tasks

goddessfreya closed this as completed in #1445 Feb 10, 2020

alvinhochun mentioned this issue Jan 11, 2021

Update pistoncore-glutin_window in conrod_piston PistonDevelopers/conrod#1406

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Eventloop initialization failure - Failed to open input method #636

Eventloop initialization failure - Failed to open input method #636

moragtong commented Aug 23, 2018 •

edited by goddessfreya

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elichai commented May 23, 2019

Grissess commented May 26, 2019

goddessfreya commented May 26, 2019

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EpicatSupercell commented Feb 5, 2020 •

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gentooboontoo commented Feb 9, 2020

sshaikh commented May 19, 2021 •

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Eventloop initialization failure - Failed to open input method #636

Eventloop initialization failure - Failed to open input method #636

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moragtong commented Aug 23, 2018 • edited by goddessfreya Loading

elichai commented May 23, 2019

Grissess commented May 26, 2019

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elichai commented May 26, 2019

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