Bootstrap assertion failure in pp_base_output_formatted_text

[Richard Earnshaw]

With this new code all arm targets seem to abort during build when we
print out a warning.  Here's a quick back-trace:

#0  fancy_abort (
    file=0x83b3360
"/home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c", 
    line=563, function=0x83b3338 "pp_base_output_formatted_text")
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:589
#1  0x082671ce in pp_base_output_formatted_text (pp=0x843e428)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c:567
#2  0x08132a02 in diagnostic_report_diagnostic (context=0x83cf860, 
    diagnostic=0xbfffe120)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:353
#3  0x08132cb1 in pedwarn (
    gmsgid=0x83344a0 "ISO C90 does not support %<static%> or type
qualifiers in parameter array declarators")
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:473
  ...

At the time of the abort the line length in the buffer is  non-zero. 
The write that last changed the buffer was here, when (presumably) ':\n'
was written.

#0  pp_base_append_text (pp=0x843e428, start=0x841a174 ":\n", 
    end=0x8419e40 "è\017")
    at /home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c:152
#1  0x082676ed in pp_base_string (pp=0x843e428, str=0x843e428
"@\236A\b")
    at /home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c:144
#2  0x082671a9 in pp_base_output_formatted_text (pp=0x843e428)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c:568
#3  0x0826720d in pp_base_format_verbatim (pp=0x843e428,
text=0xbfffe750)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c:586
#4  0x082675e0 in pp_verbatim (pp=0x843e428, msg=0x8419e40 "è\017")
    at /home/rearnsha/gnusrc/egcs-cross/gcc/pretty-print.c:770
#5  0x08132900 in diagnostic_report_current_module (context=0x83cf860)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:294
#6  0x0813287c in diagnostic_report_current_function (context=0x83cf860)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:265
#7  0x08132940 in default_diagnostic_starter (context=0x83cf860, 
    diagnostic=0xbfffe820)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:303
#8  0x081329fa in diagnostic_report_diagnostic (context=0x83cf860, 
    diagnostic=0xbfffe820)
    at /home/rearnsha/gnusrc/egcs-cross/gcc/diagnostic.c:352
#9  0x08132cb1 in pedwarn (
    gmsgid=0x83344a0 "ISO C90 does not support %<static%> or type
qualifiers in 
  ...