From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id A47F738582B0 for ; Fri, 10 Mar 2023 13:05:07 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org A47F738582B0 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678453507; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=HcKcJWuJwHjm4lWDC4Zqz2d+ZzglMx75z2g3qTPGJGc=; b=MBQ3LV1SH7IdJfcMlwPJMvRowpi7Ub/zLC6q4uCmw10X4isXqAC3FpcAT+3kwkzYTlruVO qXQBeP4ekqToILq8cD4kNP7MpXADNpU8so1LsPCIPDVCI3iOpP9lBN5WCj1BDFsAbn9s7q DNJ9N7W12m3CmX2eiuwlCmvJojNAV8I= Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-640-SjCsqyTzP3qSH2aEs1_26g-1; Fri, 10 Mar 2023 08:05:05 -0500 X-MC-Unique: SjCsqyTzP3qSH2aEs1_26g-1 Received: by mail-qv1-f72.google.com with SMTP id pv11-20020ad4548b000000b0056e96f4fd64so2901563qvb.15 for ; Fri, 10 Mar 2023 05:05:05 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678453505; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=HcKcJWuJwHjm4lWDC4Zqz2d+ZzglMx75z2g3qTPGJGc=; b=pigiqB8iiCb5WV4h/RxTICUY4CMRA8uaDG2PJ2yCvjqI+HwUzBamefOIhhlFIGMMEZ +8He1J/0i82de9EuZXy4ZoSl/nHL2nHLDg+zENuB8u8AaZKQnVUZpfE5IWU2UHdIY5EU WzPfCf26mDT4Bz7JVPKT0j8dJACmCc3rz6s0LMhUJJsnUSDgPg2RebzYmy9rPuSU+Wgz pHSPt/+Xo9Yv2aKaRLhKBKYbNqKlExG6zYZ+R4iYVccEgg01+5wnS/OZa1LVtDsjgrTF IFgS0uXd0CwztdCGZNukMMLPLWchpdwUMF40wg4olPftXUS3nmLilWoAx9fP1YamTPMv gW0g== X-Gm-Message-State: AO0yUKWUPkZLfTQzMTHdL296TemvZkuU8WzBiuHKSPCwXk/igP3ScP1W anMl0s6QX2AQXF3Tx1KuaJan5y4RZF04MaD8nVRMBRjMgeuZxz42mUB7MS86xhRbgI1zyVBEKLG q05bxZYE= X-Received: by 2002:ac8:58ca:0:b0:3c0:40c1:e7bf with SMTP id u10-20020ac858ca000000b003c040c1e7bfmr3271857qta.22.1678453505408; Fri, 10 Mar 2023 05:05:05 -0800 (PST) X-Google-Smtp-Source: AK7set+k5BTad63JxkJHYVcarKvO5AaOGCEWgkMi2zTP0Q0mDA6gmig9+wPyXraSgd07YFnczRqg3g== X-Received: by 2002:ac8:58ca:0:b0:3c0:40c1:e7bf with SMTP id u10-20020ac858ca000000b003c040c1e7bfmr3271809qta.22.1678453505061; Fri, 10 Mar 2023 05:05:05 -0800 (PST) Received: from redhat.com (2603-7000-9500-34a5-0000-0000-0000-1db4.res6.spectrum.com. [2603:7000:9500:34a5::1db4]) by smtp.gmail.com with ESMTPSA id q17-20020ac84111000000b003bfa52112f9sm1393708qtl.4.2023.03.10.05.05.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Mar 2023 05:05:04 -0800 (PST) Date: Fri, 10 Mar 2023 08:05:02 -0500 From: Marek Polacek To: Andrea Monaco Cc: gcc@gcc.gnu.org Subject: Re: No warning about duplicate values in enum Message-ID: References: <875yb8u5lp.fsf@autistici.org> MIME-Version: 1.0 In-Reply-To: <875yb8u5lp.fsf@autistici.org> User-Agent: Mutt/2.2.9 (2022-11-12) X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-6.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,KAM_SHORT,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Fri, Mar 10, 2023 at 01:57:06PM +0100, Andrea Monaco via Gcc wrote: > > In gcc 8.3.0, compiling > > > enum > test > { > FIRST = 1, > SECOND = 1, > THIRD = 2 > }; > > int > main (void) > { > return 0; > } > > > generates no warning even with -Wextra. That hit me today, because I > had a large enum with many explicitly assigned constants and I > accidentally used the same value twice, which is an obvious source of > problems. This is https://gcc.gnu.org/PR16186. Marek