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Full Discussion: fortran: segmentation fault when deallocating
Top Forums Programming fortran: segmentation fault when deallocating Post 302431971 by Giogio on Wednesday 23rd of June 2010 10:34:36 AM
Old 06-23-2010
Data fortran: segmentation fault when deallocating
Hi,
I'm looking for a quite "interesting" bug at the moment - any idea could help! (o;
Language is fortran 90, compiler gfortran (sry, dont find which version it is). As I suppose you dont want to read like 10k lines of code here, I won't post the entire thing ^^
The problem is that I get segmentation faults when deallocating four of my arrays while running the program. The output is depending on which of the arrays i deallocate first.. I always get one of those:

*** glibc detected *** double free or corruption (out)
*** glibc detected *** free(): invalid next size (normal)
*** glibc detected *** double free or corruption (!prev)
segmentation fault

This happens only when a variable - which has NOTHING to do with the arrays i'm trying to deallocate - has a certain value.
My problem is that the cause isn't one of the normal stuff - the arrays are totally well defined, i'm not trying to write values outside the boundaries, ect.
Also, I can deallocate the arrays directly after changing them the last time.

I do suppose that at some other point of the program something is going terribly wrong and sort of overwriting my arrays (But nooo, the values as well as size(), ubound() and lbound() are what they should be, and allocated() is true.)

Does anybody have an idea what is happening here? Have you seen something similar yet? What could i still try?

Greetings & thank you,
Giogio
 

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LEARN ABOUT DEBIAN

svn-do

SVN-DO(1)							 Command reference							 SVN-DO(1)

NAME

       svn-do - export a source and run a command inside the source.

SYNOPSIS

       svn-do COMMAND

DESCRIPTION

       svn-do will use svn-buildpackage to export a source, run a command inside the exported source and, if the command succeeds, copy back the
       debian/ tree

EXAMPLES

       clean the tree (useful if this requires the full source tree)

	   $ svn-do debclean
	   I: Exporting source tree via svn-buildpackage...
	   [...]
	   I: Running command: debclean
	   [...]
	   I: Copying back the debian/ tree...
	   'debian/control' -> 'path/package/debian/control'

       use quilt to refresh a patch

	   $ QUILT_PATCHES=debian/patches svn-do 
	    sh -c "quilt push 002_static-linking-dont-build-perf.patch; 
	    quilt refresh"
	   [...]
	   I: Copying back the debian/ tree...
	   [...]
	   'debian/patches/002_static-linking-dont-build-perf.patch' ->
	   '/path/package/debian/patches/002_static-linking-dont-build-perf.patch'

       Start a source editing session and decide later not to copy back the debian/ tree

	   $ svn-do $SHELL
	   [...]
	   I: Running command: /bin/zsh
	   % exit 1
	   E: command exited with 1; not copying back the debian/ tree.

       edit a patch in a CDBS' simple-patchsys based package

	   $ svn-do cdbs-edit-patch 02_pmount.patch
	   [...]

SEE ALSO

       /usr/share/doc/svn-buildpackage/()
	   The svn-buildpackage HOWTO manual

       svn-inject(1)
	   puts a Debian source package into Subversion repository

       svn-upgrade(1)
	   upgrade source package from a new upstream revision

       svn(1)
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       dpkg-buildpackage(1)
	   Debian source package tools

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	   This manual page was written by Eduard Bloch in roff.

       Goneri Le Bouder
	   Converted manpages to SGML.

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Release: 0.8.2							     May 2009								 SVN-DO(1)
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