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Article #2778

Re: switch() difficulties in gcc v1.35

#2778
From: Conor P. Cahill
Date: Sat, 23 Dec 1989 13:13
20 lines
1638 bytes
In article <18472@netnews.upenn.edu>, weisen@eniac.seas.upenn.edu) (Neil I. Weisenfeld ;-) writes:
> I am using gcc v1.35 under DEC's ULTRIX.  I was diligently working on
> a project that was due the next morning when quite a bit of my time
> was taken up trying to find a really weird bug.  As it turns out, I
> misspelled `default' as `defualt' in a switch statement.  The code
> compiled without an error, however the `defualt' was never executed;
> it just dropped out of the switch.  Is this a bug or is there a
> rational `C' explanation for this?

This will happen in any C compiler.  Since the defualt does not 
match "default" it is then interpreted as a label (used by goto's).  So
your defualt: code would be executed as part of the preceding case.

If you had linted the code, you would have gotten a message about
defualt being unused.  This would have pointed out the problem to you.
-- 
+-----------------------------------------------------------------------+
| Conor P. Cahill     uunet!virtech!cpcahil      	703-430-9247	!
| Virtual Technologies Inc.,    P. O. Box 876,   Sterling, VA 22170     |
+-----------------------------------------------------------------------+
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Message-ID: <1989Dec23.131341.3322@virtech.uucp>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!wuarchive!uunet!virtech!cpcahil
References: <18472@netnews.upenn.edu>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!wuarchive!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: gnu.gcc.bug,comp.lang.c
Subject: Re: switch() difficulties in gcc v1.35
Summary: it turns into a goto label
Message-ID: <1989Dec23.131341.3322@virtech.uucp>
Date: 23 Dec 89 13:13:41 GMT
References: <18472@netnews.upenn.edu>
Organization: Virtual Technologies Inc.
Lines: 20