Hello,

Yesterday, I tried to build the development branch of Sage on my machine 
and failed. Apparently, the error occurs when attempting to build 
conway_polynomials-0.4.p0.

Here are my machine specs:
Lubuntu 14.10 Virtual Machine running on Mac OSX Lion
The underlying hardware is a MacbookAir. In particular, it is a 64 bit 
processor.

I'm posting the error message below. Please let me know if you need any 
further information, and of course, if anyone can help me to get the build 
to work.

Thanks!
Dinakar Muthiah


Here is the error message that I get from the build (in particular, it 
suggests I post the message here). 

Setting up build directory for conway_polynomials-0.4.p0
Finished set up
****************************************************
Host system:
Linux dinakar-Lubuntu 3.16.0-31-generic #43-Ubuntu SMP Tue Mar 10 17:37:36 
UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
****************************************************
C compiler: gcc
C compiler version:
Using built-in specs.
COLLECT_GCC=/home/dmuthiah/sage/sage-git/local/bin/gcc
COLLECT_LTO_WRAPPER=/home/dmuthiah/sage/sage-git/local/libexec/gcc/x86_64-unknown-linux-gnu/4.9.2/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../src/configure 
--prefix=/home/dmuthiah/sage/sage-git/local 
--with-local-prefix=/home/dmuthiah/sage/sage-git/local 
--with-gmp=/home/dmuthiah/sage/sage-git/local 
--with-mpfr=/home/dmuthiah/sage/sage-git/local 
--with-mpc=/home/dmuthiah/sage/sage-git/local --with-system-zlib 
--disable-multilib --disable-nls --enable-languages=c,c++,fortran 
--disable-libitm  
Thread model: posix
gcc version 4.9.2 (GCC) 
****************************************************
Traceback (most recent call last):
  File "./spkg-install", line 4, in <module>
    from sage.all import save
  File 
"/home/dmuthiah/sage/sage-git/local/lib/python2.7/site-packages/sage/all.py", 
line 84, in <module>
    from sage.misc.all       import *         # takes a while
  File 
"/home/dmuthiah/sage/sage-git/local/lib/python2.7/site-packages/sage/misc/all.py",
 
line 87, in <module>
    from functional import (additive_order,
  File 
"/home/dmuthiah/sage/sage-git/local/lib/python2.7/site-packages/sage/misc/functional.py",
 
line 26, in <module>
    import sage.interfaces.expect
  File 
"/home/dmuthiah/sage/sage-git/local/lib/python2.7/site-packages/sage/interfaces/expect.py",
 
line 58, in <module>
    import pexpect
ImportError: No module named pexpect

real    0m0.272s
user    0m0.185s
sys    0m0.063s
************************************************************************
Error installing package conway_polynomials-0.4.p0
************************************************************************
Please email sage-devel (http://groups.google.com/group/sage-devel)
explaining the problem and including the relevant part of the log file
  /home/dmuthiah/sage/sage-git/logs/pkgs/conway_polynomials-0.4.p0.log
Describe your computer, operating system, etc.
If you want to try to fix the problem yourself, *don't* just cd to
/home/dmuthiah/sage/sage-git/local/var/tmp/sage/build/conway_polynomials-0.4.p0 
and type 'make' or whatever is appropriate.
Instead, the following commands setup all environment variables
correctly and load a subshell for you to debug the error:
  (cd 
'/home/dmuthiah/sage/sage-git/local/var/tmp/sage/build/conway_polynomials-0.4.p0'
 
&& '/home/dmuthiah/sage/sage-git/sage' --sh)
When you are done debugging, you can type "exit" to leave the subshell.
************************************************************************
Makefile:739: recipe for target 
'/home/dmuthiah/sage/sage-git/local/var/lib/sage/installed/conway_polynomials-0.4.p0'
 
failed
make[2]: *** 
[/home/dmuthiah/sage/sage-git/local/var/lib/sage/installed/conway_polynomials-0.4.p0]
 
Error 1
make[2]: Leaving directory '/home/dmuthiah/sage/sage-git/build'
Makefile:562: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/dmuthiah/sage/sage-git/build'

real    270m19.882s
user    235m20.678s
sys    23m59.507s
***************************************************************
Error building Sage.

The following package(s) may have failed to build:

package: conway_polynomials-0.4.p0
log file: 
/home/dmuthiah/sage/sage-git/logs/pkgs/conway_polynomials-0.4.p0.log
build directory: 
/home/dmuthiah/sage/sage-git/local/var/tmp/sage/build/conway_polynomials-0.4.p0

The build directory may contain configuration files and other potentially
helpful information. WARNING: if you now run 'make' again, the build
directory will, by default, be deleted. Set the environment variable
SAGE_KEEP_BUILT_SPKGS to 'yes' to prevent this.

Makefile:19: recipe for target 'build' failed
make: *** [build] Error 1



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