Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!nic.MR.NET!umn-cs!mmm!manning
From: manning@mmm.UUCP (Arthur T. Manning)
Newsgroups: comp.os.os9
Subject: Re: printf bug with C compiler...fatal runtime error!
Message-ID: <1225@mmm.UUCP>
Date: 30 Jan 89 14:38:34 GMT
References: <1223@mmm.UUCP>
Reply-To: manning@mmm.UUCP (Arthur T. Manning)
Distribution: usa
Organization: 3M Company - Software and Electronics Resource Center (SERC); St. Paul, MN
Lines: 37

/*
I received this explation from David West of Microware (515-224-1929):

"The problem demonstrated by the program above is a known bug in the
Microware C library and will be corrected in the next release (version
3.1).  [It may be possible to patch the bug depending on C compiler and
operating system versions.]"

*/



#include <stdio.h>

main()
{
	double x = 123.45;
	double *double_ptr = &x;
	short *short_ptr = (short *)&x;
	
    printf("double is %5.2f\n",x);

    *short_ptr = 0x6666; /* this must make x an illegally formatted double? */
    
    printf("double is now -->"); fflush(stdout);
    
    /* this program appears to crash at this point */
    printf("%5.2f\n",x);
    
    printf("\nprogram complete!\n\n");
}


-- 
Arthur T. Manning                                Phone: 612-733-4401
3M Center  518-1                                 FAX:   612-736-3122
St. Paul  MN  55144-1000   U.S.A.                Email: manning@mmm.uucp