I am able to reproduce the issue Alan is seeing...

(gdb) bt full
#0  0x00007ffff4ef28c7 in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007ffff4ef452a in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007ffff7bb79fb in ink_die_die_die (retval=1) at ink_error.cc:43
No locals.
#3  0x00007ffff7bb7aca in ink_fatal_va(int, const char *, typedef __va_list_tag __va_list_tag *) (return_code=1,
    fmt=0x7ffff7bc8398 "%s:%d: failed assert `%s`", ap=0x7ffff1f67148)
    at ink_error.cc:67
        msg = "FATAL: HttpSM.cc:2499: failed assert `server_entry == NULL`", '\000' <repeats 964 times>
        len = 7
#4  0x00007ffff7bb7b6d in ink_fatal (return_code=1,
    message_format=0x7ffff7bc8398 "%s:%d: failed assert `%s`")
    at ink_error.cc:75
        ap = {{gp_offset = 40, fp_offset = 48,
            overflow_arg_area = 0x7ffff1f67220,
            reg_save_area = 0x7ffff1f67160}}
#5  0x00007ffff7bb5590 in _ink_assert (
    expression=0x7a719b "server_entry == NULL", file=0x7a6edc "HttpSM.cc",
    line=2499) at ink_assert.cc:37


On Mar 24, 2015, at 11:13 AM, Alan Carroll <solidwallofcode@yahoo-inc.com> wrote:

I checked out 5.2.1-rc0, did a clean build and installed fresh. I made the following changes to records.config

proxy.config.url.remap.remap_required INT 0
proxy.config.http.redirection_enabled INT 1
proxy.config.http.number_of_redirections INT 3

If I start this and do "curl --proxy localhost:8080 http://docs.trafficserver.apache.org" it crashes due to an assert.

Igor - do you have any stack traces or additional logging data in traffic.out? Are you running under load or is this without any traffic at all?