[fpc-pascal] Strange debugging issue

John Coppens john at jcoppens.com
Mon Apr 5 16:17:17 CEST 2010

Hi all,

When trying to debug a series of events in a program, parts of source
lines disappear - apart from the fact that the execution secuence seems
very off.

This extract from the source file:

      if ch = eofchar then
        sy := sps[ch]
      else begin
        goto 1;

(with ch effectively = eofchar) produces the following:

654	      if ch = eofchar then
(gdb) n
655	        sy := sps[ch]
(gdb) n
659	to 1;
(gdb) n
661	l_read := true;
(gdb) n
662	n dbg_flags then
(gdb) n
[symbol_read] symbol: eofsy
663	 symbol: ', sy);
(gdb) n

I haven't seen this kind of problem before, not in Pascal nor in C.
Why is the '... to 1' appearing in the listing?

Using FPC 2.4.0, and gdb 6.8


More information about the fpc-pascal mailing list