http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56136
Bug #: 56136
Summary: Compiler fails when code contains lhs-reallocation of
an object with overloaded (elemental) Assignment
operator
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: fortran
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: alipasha.cele...@gmail.com
Created attachment 29299
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29299
The code that causes compiler crash
Upon compiling the following code using GNU Fortran (GCC) 4.8.0 20130128
(experimental):
MODULE A_TEST_M
TYPE :: A_TYPE
CONTAINS
GENERIC :: ASSIGNMENT (=) => ASGN_A
PROCEDURE, PRIVATE :: ASGN_A
END TYPE
CONTAINS
ELEMENTAL SUBROUTINE ASGN_A (A, B)
CLASS (A_TYPE), INTENT (INOUT) :: A
CLASS (A_TYPE), INTENT (IN) :: B
END SUBROUTINE
END MODULE A_TEST_M
PROGRAM ASGN_REALLOC_TEST
USE A_TEST_M
TYPE (A_TYPE), ALLOCATABLE :: A(:)
ALLOCATE (A(100))
A(1:50) = A(51:100)
A = A(1:50)
END PROGRAM
placed in file "asgn_realloc_test.f" with compile call:
user@machine:~/../quicktest$ gfortran asgn_realloc_test.f
causes compiler to crash with the following messages:
asgn_realloc_test.f: In function ‘test’:
asgn_realloc_test.f:22:0: internal compiler error: in gfc_conv_variable, at
fortran/trans-expr.c:1658
A = A(1:50)
^
0x5db000 gfc_conv_variable
../.././gcc/fortran/trans-expr.c:1658
0x5d75ca gfc_conv_expr(gfc_se*, gfc_expr*)
../.././gcc/fortran/trans-expr.c:6263
0x5dbef3 gfc_conv_expr_reference(gfc_se*, gfc_expr*)
../.././gcc/fortran/trans-expr.c:6357
0x5dc2fa gfc_conv_derived_to_class(gfc_se*, gfc_expr*, gfc_typespec,
tree_node*, bool, bool)
../.././gcc/fortran/trans-expr.c:305
0x5d426a gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
../.././gcc/fortran/trans-expr.c:4087
0x5ff84c gfc_trans_call(gfc_code*, bool, tree_node*, tree_node*, bool)
../.././gcc/fortran/trans-stmt.c:491
0x5a4663 trans_code
../.././gcc/fortran/trans.c:1511
0x5cb57e gfc_generate_function_code(gfc_namespace*)
../.././gcc/fortran/trans-decl.c:5390
0x564390 translate_all_program_units
../.././gcc/fortran/parse.c:4463
0x564390 gfc_parse_file()
../.././gcc/fortran/parse.c:4677
0x59fe75 gfc_be_parse_file
../.././gcc/fortran/f95-lang.c:189
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
Note that the line before the reallocating assignment (A(1:50) = A(51:100))
will not cause errors.
Compiler was configured using:
sudo LIBRARY_PATH=/usr/lib/x86_64-linux-gnu ./configure
--enable-languages=c,c++,fortran --enable-libgomp --enable-lto --enable-gold
--with-plugin-ld=/usr/bin/gold
on Ubuntu:
Release 12.04 (precise) 64-bit
Kernel Linux 3.2.0-36-generic
