Doesn't happen with --enable-checking=release.

src/bmff/impl.h:126:5: internal compiler error: Aborted
0xcaf40f crash_signal
        ../../gcc/gcc/toplev.c:383
0x1339c09 linemap_add(line_maps*, lc_reason, unsigned int, char const*, unsigned int)
        ../../gcc/libcpp/line-map.c:297
0x1339e82 linemap_line_start(line_maps*, unsigned int, unsigned int)
        ../../gcc/libcpp/line-map.c:566
0x133a050 linemap_position_for_column(line_maps*, unsigned int)
        ../../gcc/libcpp/line-map.c:611
0x1338131 _cpp_lex_direct
        ../../gcc/libcpp/lex.c:2329
0x133905d _cpp_lex_token
        ../../gcc/libcpp/lex.c:2166
0x133e007 cpp_get_token_1
        ../../gcc/libcpp/macro.c:2442
0x86168c c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int)
        ../../gcc/gcc/c-family/c-lex.c:408
0x70101f cp_lexer_get_preprocessor_token
        ../../gcc/gcc/cp/parser.c:779
0x737fae cp_lexer_new_main
        ../../gcc/gcc/cp/parser.c:660
0x737fae cp_parser_new
        ../../gcc/gcc/cp/parser.c:3484
0x737fae c_parse_file()
        ../../gcc/gcc/cp/parser.c:33190
0x869c12 c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1057
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

This bug may be a duplicate of Bug 61250.

Bisect?  Reduce to a set of files to produce the PCH and a file to use it?

Created attachment 35228 [details]
Reproducer

Reduced testcase. The script should be invoked like this:
CXX=/path/to/gcc-5.0/bin/g++ ice_pch.sh

It creates 3 files and invokes GCC 2 times (one for PCH creation, one for compilation which causes ICE on current trunk). Note, that whitespaces in source files matter.

Or even simpler:

#!/bin/bash
mkdir -p ./src
mkdir -p ./build/src/preproc.h.gch

touch ./src/preproc.h

cat << EOF >./src/include.h
#include "src/preproc.h"
/* line 1 */
/* line 2 */
EOF

cat << EOF >./src/source.cpp
#include "include.h"
/* a single line with at least 128 columns and one token */                                                                                                token
EOF

cd ./build
cc1plus ../src/preproc.h --output-pch=src/preproc.h.gch/pch_file
cc1plus -I . ../src/source.cpp

Confirmed.

0xfb7742 crash_signal
        /space/rguenther/src/svn/trunk2/gcc/toplev.c:383
0x197315c linemap_add(line_maps*, lc_reason, unsigned int, char const*, unsigned int)
        /space/rguenther/src/svn/trunk2/libcpp/line-map.c:303
0x1973b1e linemap_line_start(line_maps*, unsigned int, unsigned int)
        /space/rguenther/src/svn/trunk2/libcpp/line-map.c:566
0x1973d55 linemap_position_for_column(line_maps*, unsigned int)
        /space/rguenther/src/svn/trunk2/libcpp/line-map.c:611
0x1970744 _cpp_lex_direct
        /space/rguenther/src/svn/trunk2/libcpp/lex.c:2340
0x197029a _cpp_lex_token
        /space/rguenther/src/svn/trunk2/libcpp/lex.c:2176
0x197996f cpp_get_token_1
        /space/rguenther/src/svn/trunk2/libcpp/macro.c:2442
0x1979db7 cpp_get_token_with_location(cpp_reader*, unsigned int*)
        /space/rguenther/src/svn/trunk2/libcpp/macro.c:2628
0x9e2ea3 c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int)
        /space/rguenther/src/svn/trunk2/gcc/c-family/c-lex.c:408
#2  0x000000000197315d in linemap_add (set=0x10000fe000, reason=LC_RENAME, 
    sysp=0, to_file=0x24ad430 "../src/include.h", to_line=3)
    at /space/rguenther/src/svn/trunk2/libcpp/line-map.c:303
303       linemap_assert (!(set->depth == 0 && reason == LC_RENAME));
(gdb) p set->depth
$2 = 0


It's correctly initialized by PCH but re-set at

Hardware watchpoint 1: *$10

Old value = 1
New value = 0
linemap_add (set=0x10000fe000, reason=LC_LEAVE, sysp=0, to_file=0x0, to_line=0)
    at /space/rguenther/src/svn/trunk2/libcpp/line-map.c:311
311           return NULL;
(gdb) bt
#0  linemap_add (set=0x10000fe000, reason=LC_LEAVE, sysp=0, to_file=0x0, 
    to_line=0) at /space/rguenther/src/svn/trunk2/libcpp/line-map.c:311
#1  0x000000000195e29f in _cpp_do_file_change (pfile=0x249a670, 
    reason=LC_LEAVE, to_file=0x0, file_line=0, sysp=0)
    at /space/rguenther/src/svn/trunk2/libcpp/directives.c:1067
#2  0x0000000001961a5d in _cpp_pop_buffer (pfile=0x249a670)
    at /space/rguenther/src/svn/trunk2/libcpp/directives.c:2606
#3  0x00000000019704a7 in _cpp_get_fresh_line (pfile=0x249a670)
    at /space/rguenther/src/svn/trunk2/libcpp/lex.c:2255
#4  0x0000000001970587 in _cpp_lex_direct (pfile=0x249a670)
    at /space/rguenther/src/svn/trunk2/libcpp/lex.c:2302
#5  0x000000000197029b in _cpp_lex_token (pfile=0x249a670)
    at /space/rguenther/src/svn/trunk2/libcpp/lex.c:2176
#6  0x0000000001979970 in cpp_get_token_1 (pfile=0x249a670, 
    location=0x7fffffffdc58)
...
#10 0x000000000086afd3 in cp_parser_initial_pragma (first_token=0x7fffffffdc50)
    at /space/rguenther/src/svn/trunk2/gcc/cp/parser.c:32854
#11 0x000000000082eaf7 in cp_lexer_new_main ()
    at /space/rguenther/src/svn/trunk2/gcc/cp/parser.c:650
#12 0x0000000000831d4a in cp_parser_new ()
    at /space/rguenther/src/svn/trunk2/gcc/cp/parser.c:3484
#13 0x000000000086b787 in c_parse_file ()
    at /space/rguenther/src/svn/trunk2/gcc/cp/parser.c:33189



But note that this is an usupported use of PCH - it's included indirectly.
We should have rejected it but we don't.  Appearantly my fix for that doesn't
trigger:

2009-09-22  Richard Guenther  <rguenther@suse.de>

        PR pch/38987
        * files.c (pch_open_file): Disallow non-toplevel PCH inclusion.

because of the implicit-preinclude check.

(gdb) p pfile->all_files->implicit_preinclude
$30 = false
(gdb) p pfile->all_files->next_file->implicit_preinclude
$31 = true

I don't understand why we check two files here...

(gdb) p pfile->all_files->name
$33 = 0x24ad0c0 "include.h"
(gdb) p pfile->all_files->next_file->name
$34 = 0x24ac120 "stdc-predef.h"
(gdb) p pfile->all_files->next_file->next_file->name
$35 = 0x24e3be0 "../src/source.cpp"

note how the main file is "last".  My patch got two revisions - r192715 by
Joseph and r193709 by Steve.

I think the code should be changed to sth like

  /* If the file is not included as first include from either the toplevel
     file or the command-line it is not a valid use of PCH.  */
  for (_cpp_file *f = pfile->all_files; f; f = f->next_file)
    if (f->implicit_preinclude)
      continue;
    else if (f->main_file)
      break;
    else
      return false;

note the change triggering this bug is in GCC 4.8 already (but not in 4.7).


Index: libcpp/files.c
===================================================================
--- libcpp/files.c      (revision 221891)
+++ libcpp/files.c      (working copy)
@@ -291,11 +291,13 @@ pch_open_file (cpp_reader *pfile, _cpp_f
 
   /* If the file is not included as first include from either the toplevel
      file or the command-line it is not a valid use of PCH.  */
-  if (pfile->all_files
-      && pfile->all_files->next_file
-      && !(pfile->all_files->implicit_preinclude
-          || pfile->all_files->next_file->implicit_preinclude))
-    return false;
+  for (_cpp_file *f = pfile->all_files; f; f = f->next_file)
+    if (f->implicit_preinclude)
+      continue;
+    else if (f->main_file)
+      break;
+    else
+      return false;
 
   flen = strlen (path);
   len = flen + sizeof (extension);

Fixed on trunk sofar.

Author: rguenth
Date: Thu Apr  9 13:37:53 2015
New Revision: 221949

URL: https://gcc.gnu.org/viewcvs?rev=221949&root=gcc&view=rev
Log:
2015-04-09  Richard Biener  <rguenther@suse.de>

	PR pch/65550
	* files.c (pch_open_file): Allow main and pre-included files
	when trying to open a PCH.

Modified:
    trunk/libcpp/ChangeLog
    trunk/libcpp/files.c

I suppose this is backportable to both 4.8 and 4.9.

On June 12, 2015 9:55:30 AM GMT+02:00, "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65550
>
>Jakub Jelinek <jakub at gcc dot gnu.org> changed:
>
>           What    |Removed                     |Added
>----------------------------------------------------------------------------
>               CC|                            |jakub at gcc dot gnu.org
>
>--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
>I suppose this is backportable to both 4.8 and 4.9.

Yes.  I must have missed it because the bug is not assigned to me...  Let's see if I can get to it before the RC

Author: jakub
Date: Fri Jun 12 11:56:08 2015
New Revision: 224422

URL: https://gcc.gnu.org/viewcvs?rev=224422&root=gcc&view=rev
Log:
	Backported from mainline
	2015-04-09  Richard Biener  <rguenther@suse.de>

	PR pch/65550
	* files.c (pch_open_file): Allow main and pre-included files
	when trying to open a PCH.

Modified:
    branches/gcc-4_9-branch/libcpp/ChangeLog
    branches/gcc-4_9-branch/libcpp/files.c

Author: jakub
Date: Fri Jun 12 11:56:39 2015
New Revision: 224423

URL: https://gcc.gnu.org/viewcvs?rev=224423&root=gcc&view=rev
Log:
	Backported from mainline
	2015-04-09  Richard Biener  <rguenther@suse.de>

	PR pch/65550
	* files.c (pch_open_file): Allow main and pre-included files
	when trying to open a PCH.

Modified:
    branches/gcc-4_8-branch/libcpp/ChangeLog
    branches/gcc-4_8-branch/libcpp/files.c

Fixed.