From: MIYAMUKO Katsuyuki <k-miyamuko@...>
Date: 2004-03-30T19:05:52+09:00
Subject: [ruby-dev:23274] Time.gm(...): gmtime/localtime error (ArgumentError)

みやむこです。

HP-UX 11.23 でコンパイルエラーになりました。

% uname -srm
HP-UX B.11.23 ia64
% ./configure CFLAGS="-g0 +O0 +DD64" && make
(略)
 cc main.o libruby-static.a -ldld -ldl -lm   -o miniruby -g0 +O0 +DD64
-DYYMAXDEPTH=300
rbconfig.rb updated
./lib/optparse.rb:197:in `gm': gmtime/localtime error (ArgumentError)
        from ./lib/optparse.rb:197
        from ./lib/optparse/shellwords.rb:4:in `require'
        from ./lib/optparse/shellwords.rb:4
        from ./ext/extmk.rb:31:in `require'
        from ./ext/extmk.rb:31
*** Error exit code 1

Stop.


Time.gm でエラーになっているみたいです。

% ./miniruby -e "Time.gm(2000,1,1,1,1,1)"
-e:1:in `gm': gmtime/localtime error (ArgumentError)
	from -e:1


デバッガで追いかけると以下のようになりました。

% gdb miniruby
HP gdb 4.0 for HP Itanium (32 or 64 bit) and target HP-UX 11.2x.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 4.0 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for warranty/support.
..
(gdb) break search_time_t
Breakpoint 1 at 0x4000000000373eb0:0: file time.c, line 436.
(gdb) run -e "Time.gm(2000,1,1,1,1,1)"
Starting program: /home/miyamuko/src/ruby/miniruby -e "Time.gm(2000,1,1,1,1,1)"

Breakpoint 1, search_time_t (tptr=0x9ffffffffff87d20, utc_p=2) at time.c:436
436         find_dst = 0 < tptr->tm_isdst;
(gdb) s
439         guess_lo = 1L << (8 * sizeof(time_t) - 1);
(gdb) s
443         guess_hi = ((time_t)-1) < ((time_t)0) ?
(gdb) s
447         tm = (utc_p ? gmtime : localtime)(&guess_lo);
(gdb) s
448         if (!tm) goto error;
(gdb) s
652         rb_raise(rb_eArgError, "gmtime/localtime error");
(gdb) print tm
$1 = (struct tm *) 0x0
(gdb) print guess_lo
$2 = -9223372036854775808


--
みやむこ