1 @node Getting Support and Reporting Bugs
2 @comment node-name, next, previous, up
3 @chapter Getting Support and Reporting Bugs
11 @node Volunteer Support
12 @comment node-name, next, previous, up
13 @section Volunteer Support
15 Your primary source of SBCL support should probably be the mailing
16 list @strong{sbcl-help}: in addition to other users SBCL developers
17 monitor this list and are available for advice. As an anti-spam
18 measure subcription is required for posting:
20 @urlline{https://lists.sourceforge.net/lists/listinfo/sbcl-help}
22 Remember that the people answering your question are volunteers, so
23 you stand a much better chance of getting a good answer if you ask a
26 Before sending mail, check the list archives at either
28 @urlline{http://sourceforge.net/mailarchive/forum.php?forum_name=sbcl-help}
32 @urlline{http://news.gmane.org/gmane.lisp.steel-bank.general}
34 to see if your question has been answered already. Checking the bug
35 database is also worth it @xref{Reporting Bugs}, to see if the issue
38 For general advice on asking good questions, see
40 @urlline{http://www.catb.org/~esr/faqs/smart-questions.html}.
42 @node Commercial Support
43 @comment node-name, next, previous, up
44 @section Commercial Support
46 There is no formal organization developing SBCL, but if you need a
47 paid support arrangement or custom SBCL development, we maintain the
48 list of companies and consultants below. Use it to identify service
49 providers with appropriate skills and interests, and contact them
52 The SBCL project cannot verify the accuracy of the information or the
53 competence of the people listed, and they have provided their own
54 blurbs below: you must make your own judgement of suitability from the
55 available information - refer to the links they provide, the CREDITS
56 file, mailing list archives, CVS commit messages, and so on. Please
57 feel free to ask for advice on the sbcl-help list.
60 @item Steel Bank Studio Ltd
61 provides commercial SBCL support and custom development, is run by
62 SBCL developer @emph{Nikodemus Siivola}, and has another SBCL
63 developer @emph{Richard Kreuter} as an affiliated consultant.
65 Website: @url{http://sb-studio.net/}
67 Email: @email{info@@sb-studio.net}
72 @comment node-name, next, previous, up
73 @section Reporting Bugs
75 SBCL uses Launchpad to track bugs. The bug database is available at
77 @urlline{https://bugs.launchpad.net/sbcl}
79 Reporting bugs there requires registering at Launchpad. However, bugs
80 can also be reported on the mailing list @strong{sbcl-bugs}, which is
81 moderated but does @emph{not} require subscribing.
83 Simply send email to @email{sbcl-bugs@@lists.sourceforge.net} and the
84 bug will be checked and added to Launchpad by SBCL maintainers.
86 @subsection How to Report Bugs Effectively
88 Please include enough information in a bug report that someone reading
89 it can reproduce the problem, i.e. don't write
92 Subject: apparent bug in PRINT-OBJECT (or *PRINT-LENGTH*?)
93 PRINT-OBJECT doesn't seem to work with *PRINT-LENGTH*. Is this a bug?
99 Subject: apparent bug in PRINT-OBJECT (or *PRINT-LENGTH*?)
100 In sbcl-1.2.3 running under OpenBSD 4.5 on my Alpha box, when
101 I compile and load the file
102 (DEFSTRUCT (FOO (:PRINT-OBJECT (LAMBDA (X Y)
103 (LET ((*PRINT-LENGTH* 4))
106 then at the command line type
108 the program loops endlessly instead of printing the object.
111 A more in-depth discussion on reporting bugs effectively can be found
114 @urlline{http://www.chiark.greenend.org.uk/~sgtatham/bugs.html}.
116 @subsection Signal Related Bugs
118 If you run into a signal related bug, you are getting fatal errors
119 such as @code{signal N is [un]blocked} or just hangs, and you want to
120 send a useful bug report then:
126 Compile sbcl with ldb support (feature @code{:sb-ldb}, see
127 @file{base-target-features.lisp-expr}) and change @code{#define QSHOW_SIGNAL 0} to
128 @code{#define QSHOW_SIGNAL 1} in @file{src/runtime/runtime.h}.
131 Isolate a smallish test case, run it.
134 If it just hangs kill it with sigabrt: @code{kill -ABRT <pidof sbcl>}.
137 Print the backtrace from ldb by typing @code{ba}.
140 Attach gdb: @code{gdb -p <pidof sbcl>} and get backtraces for all threads:
141 @code{thread apply all ba}.
144 If multiple threads are in play then still in gdb, try to get Lisp
145 backtrace for all threads: @code{thread apply all call
146 backtrace_from_fp($ebp, 100)}. Substitute @code{$ebp} with @code{$rbp}
147 on x86-64. The backtraces will appear in the stdout of the SBCL
151 Send a report with the backtraces and the output (both stdout and
152 stderr) produced by SBCL.
155 Don't forget to include OS and SBCL version.
158 If available, include information on outcome of the same test with
159 other versions of SBCL, OS, ...