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Re: [Patch, fortran] PR37735 - Allocatable components in vectors of derived types cause ICE on assignment
Steve Kargl wrote:
On Mon, Nov 24, 2008 at 10:45:51PM +0100, Toon Moene wrote:
One option that would help me (and probably countless others) to debug
legacy code is an -fcheck-size option.
The meaning of this option would be:
Check if array references fall within the extent of the array.
A = 1.0
SUBROUTINE SUB(A, N)
REAL A(N, N)
troutmask:kargl gfc -fbounds-check t.f90
At line 8 of file t.f90
Fortran runtime error: Array reference out of bounds for array 'a', upper bound of dimension 2 exceeded (100 > 10)
Yep, that's the problem - array bounds checking "catches" this, while
the run-of-the-mill index computation let this fall within the extent of
Parts of the code I have to maintain were written 30-40 years ago.
Apparently this was accepted practice then (and it would still work today).
Toon Moene - e-mail: email@example.com - phone: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
At home: http://moene.indiv.nluug.nl/~toon/
Progress of GNU Fortran: http://gcc.gnu.org/ml/gcc/2008-01/msg00009.html