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* [Bug fortran/103472] New: ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527
@ 2021-11-29 18:49 gscfq@t-online.de
2021-12-12 18:15 ` [Bug fortran/103472] " mikael at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: gscfq@t-online.de @ 2021-11-29 18:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103472
Bug ID: 103472
Summary: ICE in gfc_conv_ss_startstride, at
fortran/trans-array.c:4527
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
Affects versions down to at least r5 :
$ cat z1.f90
program p
integer, parameter :: a(0) = 0
print *, (a(1:1))
end
$ gfortran-12-20211128 -c z1.f90
z1.f90:3:15:
3 | print *, (a(1:1))
| 1
Warning: Lower array reference at (1) is out of bounds (1 > 0) in dimension 1
z1.f90:3:15:
3 | print *, (a(1:1))
| 1
Warning: Lower array reference at (1) is out of bounds (1 > 0) in dimension 1
z1.f90:3:20:
3 | print *, (a(1:1))
| 1
internal compiler error: in gfc_conv_ss_startstride, at
fortran/trans-array.c:4527
0x856d02 gfc_conv_ss_startstride(gfc_loopinfo*)
../../gcc/fortran/trans-array.c:4527
0x8b3535 gfc_trans_transfer(gfc_code*)
../../gcc/fortran/trans-io.c:2645
0x850627 trans_code
../../gcc/fortran/trans.c:2136
0x8b0ece build_dt
../../gcc/fortran/trans-io.c:2026
0x850607 trans_code
../../gcc/fortran/trans.c:2108
0x8795fe gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:7644
0x7fc90e translate_all_program_units
../../gcc/fortran/parse.c:6638
0x7fc90e gfc_parse_file()
../../gcc/fortran/parse.c:6925
0x84967f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:216
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/103472] ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527
2021-11-29 18:49 [Bug fortran/103472] New: ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527 gscfq@t-online.de
@ 2021-12-12 18:15 ` mikael at gcc dot gnu.org
2021-12-12 20:22 ` anlauf at gcc dot gnu.org
2024-03-21 17:58 ` mikael at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: mikael at gcc dot gnu.org @ 2021-12-12 18:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103472
Mikael Morin <mikael at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikael at gcc dot gnu.org
--- Comment #1 from Mikael Morin <mikael at gcc dot gnu.org> ---
Created attachment 51982
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51982&action=edit
draft patch
We could workaround it by replacing warnings with errors.
Are there cases where we do want warnings, not errors?
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/103472] ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527
2021-11-29 18:49 [Bug fortran/103472] New: ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527 gscfq@t-online.de
2021-12-12 18:15 ` [Bug fortran/103472] " mikael at gcc dot gnu.org
@ 2021-12-12 20:22 ` anlauf at gcc dot gnu.org
2024-03-21 17:58 ` mikael at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: anlauf at gcc dot gnu.org @ 2021-12-12 20:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103472
anlauf at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-12-12
Status|UNCONFIRMED |NEW
Priority|P3 |P4
Ever confirmed|0 |1
CC| |anlauf at gcc dot gnu.org
--- Comment #2 from anlauf at gcc dot gnu.org ---
(In reply to Mikael Morin from comment #1)
> We could workaround it by replacing warnings with errors.
> Are there cases where we do want warnings, not errors?
I would consider the testcase as invalid, so an error appears ok.
But technically the lower bound of a is 1 and upper bound is 0,
so the error message is a bit misleading.
E.g. NAG gives:
Error: pr103472-z1.f90, line 2: First subscript (1) is greater than upper bound
(0) for array A
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug fortran/103472] ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527
2021-11-29 18:49 [Bug fortran/103472] New: ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527 gscfq@t-online.de
2021-12-12 18:15 ` [Bug fortran/103472] " mikael at gcc dot gnu.org
2021-12-12 20:22 ` anlauf at gcc dot gnu.org
@ 2024-03-21 17:58 ` mikael at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: mikael at gcc dot gnu.org @ 2024-03-21 17:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103472
Mikael Morin <mikael at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |14.0
Known to fail| |13.2.0
--- Comment #3 from Mikael Morin <mikael at gcc dot gnu.org> ---
The example from comment #0 is now rejected, which avoids the problem:
comment_0.f90:3:15:
3 | print *, (a(1:1))
| 1
Warning: Lower array reference at (1) is out of bounds (1 > 0) in dimension 1
comment_0.f90:3:15:
3 | print *, (a(1:1))
| 1
Warning: Lower array reference at (1) is out of bounds (1 > 0) in dimension 1
comment_0.f90:3:15:
3 | print *, (a(1:1))
| 1
Error: index in dimension 1 is out of bounds at (1)
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-11-29 18:49 [Bug fortran/103472] New: ICE in gfc_conv_ss_startstride, at fortran/trans-array.c:4527 gscfq@t-online.de
2021-12-12 18:15 ` [Bug fortran/103472] " mikael at gcc dot gnu.org
2021-12-12 20:22 ` anlauf at gcc dot gnu.org
2024-03-21 17:58 ` mikael at gcc dot gnu.org
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