NetBSD Problem Report #53219

From dholland@macaran.eecs.harvard.edu  Sat Apr 28 03:49:44 2018
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Date: Fri, 27 Apr 2018 23:49:33 -0400 (EDT)
From: dholland@eecs.harvard.edu
Reply-To: dholland@NetBSD.org
To: gnats-bugs@NetBSD.org
Subject: lint doesn't allow bitfields in unions
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>Number:         53219
>Category:       toolchain
>Synopsis:       lint doesn't allow bitfields in unions
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    toolchain-manager
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 28 03:50:00 +0000 2018
>Closed-Date:    Mon Feb 07 02:47:05 +0000 2022
>Last-Modified:  Mon Feb 07 02:47:05 +0000 2022
>Originator:     David A. Holland
>Release:        NetBSD 8.99.14 (20180402)
>Organization:
>Environment:
System: NetBSD macaran 8.99.14 NetBSD 8.99.14 (MACARAN) #48: Mon Apr 2 18:37:50 EDT 2018 dholland@macaran:/usr/src/sys/arch/amd64/compile/MACARAN amd64
Architecture: x86_64
Machine: amd64
>Description:

lint doesn't allow bitfields to appear in unions.

Having a bitfield in a union seems fairly useless, but doesn't appear
to be prohibited by the C standard.

>How-To-Repeat:

   --- foo.c ---
union foo {
   int x;
   unsigned y : 7;
};
   ------

% lint -chapbxzgFS foo.c
foo.c:
foo.c(3): illegal use of bit-field [41]
Exit 1
% 

>Fix:

dunno

>Release-Note:

>Audit-Trail:
From: "Roland Illig" <rillig@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/53219 CVS commit: src/tests/usr.bin/xlint/lint1
Date: Mon, 7 Feb 2022 02:39:10 +0000

 Module Name:	src
 Committed By:	rillig
 Date:		Mon Feb  7 02:39:10 UTC 2022

 Modified Files:
 	src/tests/usr.bin/xlint/lint1: msg_041.c msg_041.exp

 Log Message:
 tests/lint: add test for message 41 about bit-field in union

 See PR toolchain/53219.


 To generate a diff of this commit:
 cvs rdiff -u -r1.2 -r1.3 src/tests/usr.bin/xlint/lint1/msg_041.c \
     src/tests/usr.bin/xlint/lint1/msg_041.exp

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

From: "Roland Illig" <rillig@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/53219 CVS commit: src
Date: Mon, 7 Feb 2022 02:44:49 +0000

 Module Name:	src
 Committed By:	rillig
 Date:		Mon Feb  7 02:44:49 UTC 2022

 Modified Files:
 	src/tests/usr.bin/xlint/lint1: msg_041.c msg_041.exp
 	src/usr.bin/xlint/lint1: decl.c err.c

 Log Message:
 lint: reword message about bit-field in a union

 There is nothing illegal about a bit-field in a union, it is allowed by
 C90, C99 and C11.

 Fixes PR toolchain/53219.


 To generate a diff of this commit:
 cvs rdiff -u -r1.3 -r1.4 src/tests/usr.bin/xlint/lint1/msg_041.c \
     src/tests/usr.bin/xlint/lint1/msg_041.exp
 cvs rdiff -u -r1.243 -r1.244 src/usr.bin/xlint/lint1/decl.c
 cvs rdiff -u -r1.151 -r1.152 src/usr.bin/xlint/lint1/err.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

State-Changed-From-To: open->closed
State-Changed-By: rillig@NetBSD.org
State-Changed-When: Mon, 07 Feb 2022 02:47:05 +0000
State-Changed-Why:
Fixed in decl.c 1.243 and err.c 1.152, thanks for the PR.
The error had been downgraded to a warning in decl.c 1.241 from
2021-09-17 already.


>Unformatted:

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