[Bug preprocessor/69650] [6 Regression] ICE in linemap_line_start, at libcpp/line-map.c:803

[rogero at howzatt dot demon.co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69650

--- Comment #51 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Thanks, I hope to try that on Monday.
The function gets called multiple times, so I need to identify the last time.

The memory must have changed *during* the call to do_linemarker as the new_file
variable is set from map on line 981:

  const char *new_file = ORDINARY_MAP_FILE_NAME (map);

but the same call executed now fails:

(gdb) p ORDINARY_MAP_FILE_NAME (map)
$3 = 0xa5a5a5a5a5a5a5a5 <error: Cannot access memory at address
0xa5a5a5a5a5a5a5a5>