I am having a problem with PostgreSQL 7.4.6 under NetBSD 2.0 RC5.  Here
is the GDB dump:

#0  0x483cafeb in kill () from /usr/lib/libc.so.12
#1  0x483cd0af in __libc_mutex_catchall_stub (m=1212478892)
    at /usr/src/lib/libc/thread-stub/thread-stub.c:112
#2  0x4843f0f7 in free (ptr=<incomplete type>)
    at /usr/src/lib/libc/stdlib/malloc.c:1149
#3  0x081b3efc in AllocSetDelete (context=<error type>) at aset.c:464
#4  0x081b468a in MemoryContextDelete (context=<error type>) at
#mcxt.c:192
/usr/src/gnu/dist/gdb/gdb/gdbtypes.c:515: gdb-internal-error:
make_cv_type: Assertion `TYPE_OBJFILE (*typeptr) == TYPE_OBJFILE (type)
|| TYPE_STUB (*typeptr)' failed.
An internal GDB error was detected.  This may make further
debugging unreliable.  Quit this debugging session? (y or n) 

First of all, what's with that GDB error?  I have never seen it before. 
Second, Why am I dying in that code?  Here is where it dies.

int
__libc_mutex_catchall_stub(mutex_t *m)
{
    /* LINTED deliberate lack of effect */
    (void)m;
 
    CHECK_NOT_THREADED();
 
    return (0);
}

The macro is defined as follows:

#define CHECK_NOT_THREADED_ALWAYS() \
do {                    \
    if (__isthreaded)       \
        DIE();          \
} while (/*CONSTCOND*/0)

#if 1
#define CHECK_NOT_THREADED()    CHECK_NOT_THREADED_ALWAYS()
#else
#define CHECK_NOT_THREADED()    /* nothing */
#endif 

Not being a kernel hacker myself I am not sure exactly what is happening
here but it seems like the app thinks that it is not threaded but the
__isthreaded variable says that it is.  I checked and the value is 1 at
the sime it crashes.

This does seem to be a problem only with the current version of
PostgreSQL (7.4.6) and not a slightly older one (7.4.3) but I can't see
how it could be an application fault.

-- 
D'Arcy J.M. Cain <darcy@NetBSD.org>
http://www.NetBSD.org/