Package: maxima Version: 5.41.0-3 Severity: normal While writing a script for Maxima, I wanted to print output to stdout while simultaneously printing debug output to stderr. I am reporting this as a debian bug first because console I/O likely ties in to the underlying libraries and build configuration.
In the documentation for the Maxima "printf" function it states: > If dest is a stream or true, then printf returns false. Otherwise, printf > returns a string containing the output. By default the streams stdin, stdout > and stderr are defined. However, the output I expected to go to stderr actually went to stdout instead. Here is a one-liner to show the behaviour: > maxima --very-quiet -r >maxima-stdout 2>maxima-stderr \ > 'printf(stdout,"stdout~%")$ printf(stderr,"stderr~%")$' I expect two files: maxima-stdout should contain "stdout" and maxima-stderr should contan "stderr". Instead, maxima-stdout contains both lines and maxima-stderr is empty. Starting up a Maxima session, stdout and stderr does not seem to mean anything until using them with printf(). After doing that, I can print what stdout and stderr are connected to: > Maxima 5.41.0 http://maxima.sourceforge.net > using Lisp GNU Common Lisp (GCL) GCL 2.6.12 > Distributed under the GNU Public License. See the file COPYING. > Dedicated to the memory of William Schelter. > The function bug_report() provides bug reporting information. > (%i1) stdout; > (%o1) stdout > (%i2) stderr; > (%o2) stderr > (%i3) printf(stdout,"Hello")$ > Hello > (%i4) printf(stderr,"World")$ > World > (%i5) stdout; > (%o5) #<synonym stream to *TERMINAL-IO*> > (%i6) stderr; > (%o6) #<synonym stream to *TERMINAL-IO*> My Maxima bug_report() says this: ------------------------------------------------------------- Maxima version: "5.41.0" Maxima build date: "2018-03-29 16:06:55" Host type: "x86_64-pc-linux-gnu" Lisp implementation type: "GNU Common Lisp (GCL)" Lisp implementation version: "GCL 2.6.12" ------------------------------------------------------------- -- System Information: Debian Release: buster/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.17.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE=en_US.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages maxima depends on: ii libc6 2.27-5 ii libgmp10 2:6.1.2+dfsg-3 ii libreadline7 7.0-5 ii libx11-6 2:1.6.5-1 Versions of packages maxima recommends: ii gnuplot-x11 5.2.2+dfsg1-2 ii maxima-share 5.41.0-3 Versions of packages maxima suggests: ii maxima-doc 5.41.0-3 pn maxima-emacs <none> pn texmacs <none> ii tk [wish] 8.6.0+9 pn xmaxima <none> -- no debconf information
