[Bug fortran/103045] New: False report substring out of bounds with -fbounds-check
krefson at gmail dot com
gcc-bugzilla@gcc.gnu.org
Tue Nov 2 12:32:09 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103045
Bug ID: 103045
Summary: False report substring out of bounds with
-fbounds-check
Product: gcc
Version: 10.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: krefson at gmail dot com
Target Milestone: ---
Created attachment 51723
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51723&action=edit
Test program
The attached (correct) program generates an incorrect report of a substring
bounds error when compiled with -fbounds-check.
$ gfortran-10 -g -fbounds-check -fbacktrace debugtest.f90
$ ./a.out
Fortran runtime error: Substring out of bounds: lower bound (0) of 'sf_string'
is less than one
Error termination. Backtrace:
#0 0x7f9a46a8a744 in ???
#1 0x7f9a46a8b219 in ???
#2 0x7f9a46a8b82a in ???
#3 0x4009b4 in debugtest
at /home/kr/CASTEP/Compiler_BUGS/Gfortran_Debug_False/debugtest.f90:10
#4 0x400c86 in main
at /home/kr/CASTEP/Compiler_BUGS/Gfortran_Debug_False/debugtest.f90:14
This occurs with gcc-fortran version 8, 9, 10.
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