mesa: Don't crash when destroying contexts created with no visual.
dEQP-EGL.functional.create_context.no_config tries to create a context with no config, then immediately destroys it. The drawbuffer is never set up, so we can't dereference it asking if it's double buffered, or we'll crash on a null pointer dereference. Just bail early. Applications using EGL_KHR_no_config_context could hit this. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com> Reviewed-by: Chad Versace <chadversary@chromium.org>
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@ -1550,7 +1550,7 @@ _mesa_check_init_viewport(struct gl_context *ctx, GLuint width, GLuint height)
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static void
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handle_first_current(struct gl_context *ctx)
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{
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if (ctx->Version == 0) {
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if (ctx->Version == 0 || !ctx->DrawBuffer) {
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/* probably in the process of tearing down the context */
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return;
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}
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