Christian Brabandt wrote:
> I see a crash with Vim 8.0.0502 in test64.out when running the testsuite
> and DEBUG is defined:
>
> backtrace:
> (gdb) bt
> #0 strlen () at ../sysdeps/x86_64/strlen.S:106
> #1 0x00007ffff4ce3da3 in _IO_vfprintf_internal (s=0x555555ae7090,
> format=<optimized out>, ap=ap@entry=0x7fffffffba58) at vfprintf.c:1637
> #2 0x00007ffff4cea157 in __fprintf (stream=<optimized out>,
> format=<optimized out>) at fprintf.c:32
> #3 0x00005555556de7ca in log_subexpr (sub=0x7fffffffc3e0) at
> regexp_nfa.c:3932
> #4 0x00005555556de64a in log_subsexpr (subs=0x7fffffffc3e0) at
> regexp_nfa.c:3907
> #5 0x00005555556e1e88 in nfa_regmatch (prog=0x555555ae8470,
> start=0x555555ae85d8, submatch=0x7fffffffc5d0, m=0x7fffffffc3e0) at
> regexp_nfa.c:5802
> #6 0x00005555556e0e25 in recursive_regmatch (state=0x555555ae8650, pim=0x0,
> prog=0x555555ae8470, submatch=0x7fffffffc5d0, m=0x7fffffffc3e0,
> listids=0x7fffffffc250) at regexp_nfa.c:5219
[...]
> (gdb) frame 3
> #3 0x00005555556de7ca in log_subexpr (sub=0x7fffffffc3e0) at
> regexp_nfa.c:3932
> 3932 fprintf(log_fd, "*** group %d, start: \"%s\", end:
> \"%s\"\n",
> (gdb) p j
> $1 = 1
> (gdb) p s
> $2 = 0x555555ad71c4 "then else"
> (gdb) p e
> $3 = 0x293735392d282029 <error: Cannot access memory at address
> 0x293735392d282029>
> (gdb) p sub->list.line[j]
> $4 = {start = 0x555555ad71c4 "then else", end = 0x293735392d282029 <error:
> Cannot access memory at address 0x293735392d282029>}
>
>
> I usually do #undef DEBUG in regexp.c and regexp_nfa.c so i did not see
> this error before, so I don't know if this is a new error or not.
Looks like the in_use field value is wrong. This avoids the crash, but
it's not the right solution (the test fails):
--- a/vim80/src/regexp_nfa.c 2017-03-12 20:09:59.536467893 +0100
+++ regexp_nfa.c 2017-03-22 21:34:26.397826148 +0100
@@ -5799,6 +5799,8 @@
}
#ifdef ENABLE_LOG
fprintf(log_fd, "Match found:\n");
+ if (t->state->c == NFA_END_INVISIBLE_NEG)
+ m->norm.in_use = 0;
log_subsexpr(m);
#endif
nfa_match = TRUE;
--
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186. You overstay in the office so you can have more time surfing the net.
/// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net \\\
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