>run
	Program received signal SIGSEGV, Segmentation fault.
	0x805f7e7 in quotearg_buffer_restyled (buffer=0x8066640 "`foo.y\"", buffersize=256, arg=0x0, argsize=4294967295, 
	    quoting_style=locale_quoting_style, o=0xbfffe050) at quotearg.c:279
	279       for (i = 0;  ! (argsize == (size_t) -1 ? arg[i] == '\0' : i == argsize);  i++)

>bt

#0  0x805f7e7 in quotearg_buffer_restyled (buffer=0x8066640 "`foo.y\"", buffersize=256, arg=0x0, argsize=4294967295, 
    quoting_style=locale_quoting_style, o=0xbfffe050) at quotearg.c:279
#1  0x805fc50 in quotearg_buffer (buffer=0x8066640 "`foo.y\"", buffersize=256, arg=0x0, argsize=4294967295, o=0xbfffe050)
    at quotearg.c:515
#2  0x805fd0a in quotearg_n_options (n=0, arg=0x0, options=0xbfffe050) at quotearg.c:560
#3  0x805fdc0 in quotearg_n_style (n=0, s=locale_quoting_style, arg=0x0) at quotearg.c:591
#4  0x805f5b6 in quote_n (n=0, name=0x0) at quote.c:16
#5  0x805f5ca in quote (name=0x0) at quote.c:24
#6  0x8058983 in readgram () at reader.c:1592
#7  0x80594b6 in reader () at reader.c:1982
#8  0x804e7b6 in main (argc=2, argv=0xbffff164) at main.c:59
#9  0x40044313 in __libc_start_main (main=0x804e764 <main>, argc=2, argv=0xbffff164, init=0x8048ab4 <_init>, 
    fini=0x805ff5c <_fini>, rtld_fini=0x4000ac70 <_dl_fini>, stack_end=0xbffff15c) at ../sysdeps/generic/libc-start.c:90