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2014-10-08T12:16:11Z Krystof: has anyone (a) managed to build clasp yet (b) tried building sbcl with it?
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2014-10-08T14:55:05Z reb: pwd
2014-10-08T14:57:30Z nyef:  /home/nyef/src/lisp/sbcl/sbcl-git/
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2014-10-08T15:55:01Z christoph_debian: hmm. the debian packaging I inherited double-builds sbcl (the first with an installed version, the second build using the first). So after all the debian package should build sbcl 6 times (3 per make.sh afaik)
2014-10-08T15:55:29Z christoph_debian: Idea certainly was tyo have something consistent in the archive that would be the same thing one gets by rebuilding the package with the new sbcl installed
2014-10-08T15:55:43Z christoph_debian: but I guess the make-sh 3 builds should take care of that anyway right?
2014-10-08T15:55:49Z nyef: Three per call to make.sh doesn't sound right.
2014-10-08T15:56:57Z nyef: host-1 compiles the cross-compiler, host-2 re-uses the existing fasls built by host-1 and builds the target compiler. That's two builds of the compiler, not one.
2014-10-08T15:57:04Z stassats: more testing!
2014-10-08T15:57:26Z foom: Yeah, SBCL already effectively double-builds itself, so, other than doing reproducibility testing, it's not really necessary to do it outside as well.
2014-10-08T15:57:53Z foom: Perhaps that build script was inherited from cmucl packaging.
2014-10-08T15:58:07Z nyef: And, yes, the whole SBCL build process is designed to drastically reduce if not outright eliminate build-host effects on the final system.
2014-10-08T16:00:45Z Krystof: not outright-eliminate, sadly
2014-10-08T16:01:06Z stassats: i found that yesterday, while trying to dump ub8
2014-10-08T16:01:24Z stassats: with incomprehensible type errors
2014-10-08T16:01:26Z Krystof: clisp and sbcl hosts differ in 8 fasls, out of ~350
2014-10-08T16:01:41Z Krystof: ccl and sbcl hosts differ in a further 4
2014-10-08T16:02:06Z Krystof: stassats: did you figure out the cause of the incomprehensible type errors?
2014-10-08T16:02:12Z stassats: turns out, i had to call register-specialized-array
2014-10-08T16:02:14Z nyef: And that's with the reproducible-fasls stuff enabled?
2014-10-08T16:02:39Z stassats: and also, my macro expanded into the wrong thing, but those errors were incomprehensible too
2014-10-08T16:02:42Z nyef: How much of the damage is floaty-related?
2014-10-08T16:03:11Z Krystof: nyef: none
2014-10-08T16:03:16Z nyef: Hrm. Neat.
2014-10-08T16:03:57Z Krystof: I think most of the rest is (a) character huffman table; (b) something weird to do with alien-type-type-alien-types (c) something else weird to do with VOPs
2014-10-08T16:04:08Z Krystof: I fixed the floaty stuff some time ago, I think
2014-10-08T16:07:50Z nyef: Unfortunately, not something that I have the patience to dig into right now, even if a couple of the possibilities sound interesting.
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2014-10-08T17:06:29Z christoph_debian: hm
2014-10-08T17:06:31Z christoph_debian: fatal error encountered in SBCL pid 22485(tid 4158009344):
2014-10-08T17:06:33Z christoph_debian: maybe_defer_handler: gc_blocked_deferrables true
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2014-10-08T17:06:46Z christoph_debian: (sbcl 1.2.4 on powerpc building sb-bsd-socket)
2014-10-08T17:07:22Z christoph_debian: switching to only build once I guess then :-)
2014-10-08T17:08:04Z nyef: Umm... Is that repeatable?
2014-10-08T17:08:37Z nyef: ... How many cores are you running on, and is this a threaded build?
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2014-10-08T17:14:11Z christoph_debian: it's with threads enabled
2014-10-08T17:14:25Z christoph_debian: and I'm pretty sure the machine has some cores
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2014-10-08T17:16:40Z christoph_debian: repeatable: let's try
2014-10-08T17:16:57Z christoph_debian: https://buildd.debian.org/status/fetch.php?pkg=sbcl&arch=powerpc&ver=2%3A1.2.4-1&stamp=1412787456 for full log
2014-10-08T17:25:47Z nyef: Hrm. At the same time, there's probably only one thread at that point.
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2014-10-08T20:17:22Z nyef: Bug 1378939 doesn't occur on 1.1.5.23, FWIW.
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2014-10-08T21:06:12Z scymtym_: i think the problem is that the condition type test signals an error while the faulty cluster is still in *handler-clusters*
2014-10-08T21:06:36Z nyef: Wouldn't surprise me, but it's still a regression.
2014-10-08T21:06:56Z scymtym_: right, i have no explanation for that
2014-10-08T21:07:40Z scymtym_: actually, it's probably my "Fewer *HANDLER-CLUSTERS* special re-bindings in SIGNAL" commit
2014-10-08T21:08:18Z nyef: Oh, for reliable backtraces... /-:
2014-10-08T21:09:40Z scymtym_: i was thinking about changing *handler-clusters* to contain pairs of compiled predicates and handlers instead of type specifiers and handlers
2014-10-08T21:10:21Z scymtym_: in that scheme, a slow but safe predicate could be constructed for types which are unknown at compile-time
2014-10-08T21:10:38Z scymtym_: (and it would make SIGNAL much faster)
2014-10-08T21:11:32Z nyef: Bisect first before attempting to debug the issue. (-:
2014-10-08T21:12:01Z scymtym_: i can do that tomorrow, but i'm pretty sure, i understand now what's going on
2014-10-08T21:13:47Z scymtym_: i'm mainly wondering whether i should revert that particular commit and basically keep the current scheme or try to switch to a new (faster) scheme and solve the issue within that context
2014-10-08T21:15:04Z scymtym_: the compiled-predicate scheme would also signal a compile-time style-warning when compiling the predicate containing the unknown type
2014-10-08T21:15:19Z scymtym_: sorry, in the lp bug report i mean
2014-10-08T21:34:00Z scymtym_: i will look at this tomorrow, add tests, and revert the broken optimization if the compiled-predicate idea doesn't work out
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