https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86120
Bug ID: 86120
Summary: SIGSEGV without backtrace when using submodules
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: simon.kluepfel at gmail dot com
Target Milestone: ---
Created attachment 44264
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44264&action=edit
source code
The attached code does not run as expected when compiling with -O3 using
gfortran 6 and 7. For gfortran-6 a write statement to a file inside the routine
"fixes" the segfault. Works for gfortran-8.
Moving the submodule into the module, or not using the str_set routine avoids
the segfault as well.
compiled with:
gfortran-XXX -O3 -std=f2008 -g -fbacktrace -fcheck=all string.f03 dt.f03
dt_sub.f03 main.f03
for XXX=
gcc version 6.4.0 20180424 (Debian 6.4.0-17)
gcc version 7.3.0 (Debian 7.3.0-21)
gcc version 8.1.0 (Debian 8.1.0-5)
output expected / v. 8:
$ ./a.out
1 2
1 2
1 2
$
v. 7:
$ ./a.out
1 2
1 2
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7f8c0df6e0fd in ???
#1 0x7f8c0df6d343 in ???
#2 0x7f8c0d3e2eff in ???
#3 0x0 in ???
Segmentation fault
v. 6:
$ ./a.out
1 2
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7f1cbf72dced in ???
#1 0x7f1cbf72cf4d in ???
#2 0x7f1cbeba1eff in ???
#3 0x0 in ???
Segmentation fault
