[Bug translator/22110] New: semok/autocast07.stp internal error

["dsmith at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22110

            Bug ID: 22110
           Summary: semok/autocast07.stp internal error
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
          Assignee: systemtap at sourceware dot org
          Reporter: dsmith at redhat dot com
  Target Milestone: ---

With HEAD systemtap, we're getting a internal error when processing
semok/autocast07.stp:

====
# stap -p2 ../src/testsuite/semok/autocast07.stp 
semantic error: while processing function
__private____src_testsuite_semok_autocast07_stp__dwarf_pretty_print_deref_0

semantic error: internal error: unresolved symbol 'pointer'

Pass 2: analysis failed.  [man error::pass2]
====

Note that with pre-bpf merge code, this test passed fine:

====
# /root/prebpf/bin/stap -p2 ../src/testsuite/semok/autocast07.stp 
# functions
string_quoted:string (str:string)
user_string:string (addr:long)
user_string_n:string (addr:long, n:long)
user_string_quoted:string (addr:long)
__private____src_testsuite_semok_autocast07_stp__dwarf_cast_get_cast_0:long
(:long)
__private____src_testsuite_semok_autocast07_stp__dwarf_pretty_print_0:string
(:long)
__private____src_testsuite_semok_autocast07_stp__dwarf_pretty_print_deref_0:long
(:long)
# probes
begin /* <- begin */
  # locals
  sun:long
====

This specific failure is on 4.12.9-300.fc26.x86_64, but it applies to all
arches and kernels.

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