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X11TK: fix late null-check causing segfault

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The code is using `controls.window` before checking if it isn't null.

I found this bug by accident when I tried to run `SDL_ShowSimpleMessageBox`.

It first tried using Wayland with `zenity`, but since I don't have `zenity`, it fallbacked to `X11_ShowMessageBoxImpl`.

For some reason it couldn't create a window, maybe something related to XWayland, so `controls.window` was `NULL`.

(cherry picked from commit e70f1bfc29)
This commit is contained in:
Igor
2026-05-01 18:01:13 -03:00
committed by Frank Praznik
parent be6f1b74dc
commit 2dbfe0ead9
1 changed files with 2 additions and 2 deletions
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4
src/video/x11/SDL_x11messagebox.c
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@@ -250,11 +250,11 @@ static bool X11_ShowMessageBoxImpl(const SDL_MessageBoxData *messageboxdata, int
#else
controls.window = X11Toolkit_CreateWindowStruct(parent_window, NULL, SDL_TOOLKIT_WINDOW_MODE_X11_DIALOG, colorhints, false);
#endif
controls.window->cb_data = &controls;
controls.window->cb_on_scale_change = X11_OnMessageBoxScaleChange;
if (!controls.window) {
return false;
}
controls.window->cb_data = &controls;
controls.window->cb_on_scale_change = X11_OnMessageBoxScaleChange;
/* Create controls */
controls.buttonID = buttonID;