gdb/python: fix invalid use disassemble_info::stream

After this commit:

  commit 81384924cdcc9eb2676dd9084b76845d7d0e0759
  Date:   Tue Apr 5 11:06:16 2022 +0100

      gdb: have gdb_disassemble_info carry 'this' in its stream pointer

The disassemble_info::stream field will no longer be a ui_file*.  That
commit failed to update one location in py-disasm.c though.

While running some tests using the Python disassembler API, I
triggered a call to gdbpy_disassembler::print_address_func, and, as I
had compiled GDB with the undefined behaviour sanitizer, GDB crashed
as the code currently (incorrectly) casts the stream field to be a
ui_file*.

In this commit I fix this error.

In order to test this case I had to tweak the existing test case a
little.  I also spotted some debug printf statements in py-disasm.py,
which I have removed.

1 files changed, 0 insertions, 3 deletions

diff --git a/gdb/testsuite/gdb.python/py-disasm.py b/gdb/testsuite/gdb.python/py-disasm.py
index ff7ffdb..3b9008b 100644
--- a/gdb/testsuite/gdb.python/py-disasm.py
+++ b/gdb/testsuite/gdb.python/py-disasm.py
@@ -584,7 +584,6 @@ class AnalyzingDisassembler(Disassembler):
         if self._nop_index is None and result.string == "nop":
             self._nop_index = len(self._pass_1_length)
             # The offset in the following read_memory call defaults to 0.
-            print("APB: Reading nop bytes")
             self._nop_bytes = info.read_memory(result.length)
 
         # Record information about each instruction that is disassembled.
@@ -661,8 +660,6 @@ class AnalyzingDisassembler(Disassembler):
     def check(self):
         """Call this after the second disassembler pass to validate the output."""
         if self._check != self._pass_2_insn:
-            print("APB, Check : %s" % self._check)
-            print("APB, Result: %s" % self._pass_2_insn)
             raise gdb.GdbError("mismatch")
         print("PASS")