http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56293
Bug #: 56293
Summary: I/O: Segfault in write_float when trying to print a
not-word-aligned REAL(16) / -fno-align-commons
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: fortran
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Reported by Maciej Skrzypek at
http://gcc.gnu.org/ml/fortran/2013-02/msg00058.html
In the following code, "p" is not aligned; using it fails in GCC 4.8 with a
segfault in
#0 0x00007ffff7ba5e16 in write_float (dtp=dtp@entry=0x7fffffffde40,
f=f@entry=0x7fffffffdd70, source=source@entry=0x601084 <sss_+4> "",
len=len@entry=16,
comp_d=comp_d@entry=1) at libgfortran/io/write_float.def:1259
#1 0x00007ffff7ba8365 in _gfortrani_write_real (dtp=dtp@entry=0x7fffffffde40,
source=source@entry=0x601084 <sss_+4> "", length=length@entry=16)
at libgfortran/io/write.c:1470
#2 0x00007ffff7ba8dcf in list_formatted_write_scalar (size=16, kind=16,
p=0x601084 <sss_+4>, type=BT_REAL, dtp=0x7fffffffde40) at
libgfortran/io/write.c:1571
#3 _gfortrani_list_formatted_write (dtp=0x7fffffffde40, type=BT_REAL,
p=<optimized out>, kind=16, size=16, nelems=1) at libgfortran/io/write.c:1599
Compile with: -fno-align-commons
program main
real(16) p
integer i
common/sss/ i, p
print*, p
end
