🚀 go-pugleaf

When reading a COFF symbol table, gdb encounters errors that usually
are seen as missing symbols while debugging but can cause the symtab
read to fail with "Invalid symbol data: .bf/.ef/.bb/.eb symbol m..."
or "Invalid symbol data: .bb/.eb symbol mismatch at...". The problem
is in reading enum symbols, it gobbles up some sym entries after the
end of the enum symbols. Here's the simple fix:

*** coffread.c~	Tue Jul  3 17:49:57 1990
--- coffread.c	Tue Jul  3 17:50:24 1990
***************
*** 1920,1925 ****
--- 1920,1926 ----
  #else
    int offset = 0;
  #endif
+   int done = 0;
  
    type = coff_alloc_type (index);
    if (within_function)
***************
*** 1928,1934 ****
      symlist = &file_symbols;
    osyms = *symlist;
  
!   while (symnum < lastsym && symnum < nlist_nsyms_global)
      {
        read_one_sym (ms, &sub_sym, &sub_aux);
        name = ms->c_name;
--- 1929,1935 ----
      symlist = &file_symbols;
    osyms = *symlist;
  
!   while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
      {
        read_one_sym (ms, &sub_sym, &sub_aux);
        name = ms->c_name;
***************
*** 1949,1954 ****
--- 1950,1956 ----
  	    break;
  
  	  case C_EOS:
+ 	    done = 1;
  	    break;
  	}
      }

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