https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67988
Bug ID: 67988
Summary: ICE on accessing substring with negative range in
array constructor
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gerhard.steinmetz.fort...@t-online.de
Target Milestone: ---
Accessing a correctly declared character with negative substring-
range (len < -1) e.g. inside of an array constructor (temp array)
requests memory of about 2^64 (= 18446744073709551616) :
$ cat z1.f90
program p
character(3), parameter :: c = 'abc'
character(3) :: x(1)
x = c(:-2)
x = [ c(:-2) ]
end
$ gfortran -g -O0 -Wall -fcheck=all -fno-frontend-optimize z1.f90
f951: out of memory allocating 18446744073709551612 bytes after a total of
434176 bytes
---
With len = -1 :
$ cat z3.f90
program p
character(3), parameter :: c = 'abc'
character(3) :: x(1)
x = c(:-1)
x = [ c(:-1) ]
print *, x
end
$ gfortran -g -O0 -Wall -fcheck=all -fno-frontend-optimize z3.f90
$ a.out
$ gfortran z3.f90
$ a.out
?
---
Maybe related to pr67987.
