The client shipped with a PE icon Explorer showed and a window that did not:
launched from the launcher it still drew the stock Windows application icon.
Silk's Window.Create only builds the managed object. IWindow.Initialize is
what, in Silk's own words, "creates the window on the underlying platform".
Applying an icon before that throws:
after Window.Create : IsInitialized = False
SetWindowIcon BEFORE Initialize : THREW InvalidOperationException:
Window should be initialized.
after Initialize : IsInitialized = True
SetWindowIcon AFTER Initialize : returned without throwing
What made this quiet rather than obvious is the fallback. GLFW registers its
window class against a resource named GLFW_ICON and, not finding one, uses
IDI_APPLICATION - the generic Windows icon - rather than the executable's own.
So the PE icon kept showing on the file while the live window lost it, which
reads as a packaging problem and is nothing of the kind. The launcher was
unaffected because Avalonia takes a different path entirely, and that
asymmetry was the tell.
Apply now happens in OnLoad, beside the other window-dependent startup work,
and refuses with a message naming the ordering requirement if it is ever
called on an uninitialized window - the previous generic catch reported
"Window should be initialized" to a stderr nobody reads, which said nothing
about icons.
The regression guard reads the compiled call graph, because this is an
ordering edge with no observable return value: OnLoad must call Apply, and no
method that calls Window.Create may. Verified by reintroducing the bug and
watching it fail, then restoring the fix and watching it pass.
Solution builds clean; 14,408 tests pass on the standard hermetic lane filter,
0 failures.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
c254fea83d