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, 7 insertions, 1 deletions

diff --git a/gdb/testsuite/gdb.python/py-disasm.c b/gdb/testsuite/gdb.python/py-disasm.c
index ee0bb15..e5c4d2f 100644
--- a/gdb/testsuite/gdb.python/py-disasm.c
+++ b/gdb/testsuite/gdb.python/py-disasm.c
@@ -16,10 +16,16 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 int
-main ()
+test ()
 {
   asm ("nop");
   asm ("nop");	/* Break here.  */
   asm ("nop");
   return 0;
 }
+
+int
+main ()
+{
+  return test ();
+}