[committed, obvious] gdb/testsuite: fix TCL error in py-format-string.exp

[committed, obvious] gdb/testsuite: fix TCL error in py-format-string.exp

[Sandra Loosemore]

[-- Attachment #1: Type: text/plain, Size: 683 bytes --]

When GDB is built without python support, I've been seeing this TCL error:

(gdb) UNSUPPORTED: gdb.python/py-format-string.exp: format_string: 
lang_c: Python support is disabled.
ERROR: tcl error sourcing 
/path/to/gdb/testsuite/gdb.python/py-format-string.exp.
ERROR: invoked "continue" outside of a loop

The test for python support is the same one being used in all the 
gdb.python tests, it is just in the wrong place, inside a function 
instead of at top level, where it cannot meaningfully "continue".  I've 
fixed it by moving the test earlier in the file, outside the function.

I think this is sufficiently obvious that I've gone ahead and checked in 
this patch.

-Sandra

[-- Attachment #2: tcl-error.patch --]
[-- Type: text/x-patch, Size: 1722 bytes --]

commit 05e682e3be7e3d9d63ec358dcf8943fd200545cb
Author: Sandra Loosemore <sandra@codesourcery.com>
Date:   Wed Jun 17 13:43:32 2020 -0700

    Fix TCL error in gdb.python/py-format-string.exp.
    
    2020-06-17 Sandra Loosemore <sandra@codesourcery.com>
    
    	gdb/testsuite/
    	* gdb.python/py-format-string.exp: Move test for python support
    	earlier, out of function body.

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 5d76719..2d60408 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2020-06-17 Sandra Loosemore <sandra@codesourcery.com>
+
+	Fix TCL error in gdb.python/py-format-string.exp.
+
+	* gdb.python/py-format-string.exp: Move test for python support
+	earlier, out of function body.
+
 2020-06-15  Simon Marchi  <simon.marchi@efficios.com>
 
 	* gdb.base/index-cache-load-twice.c: New.
diff --git a/gdb/testsuite/gdb.python/py-format-string.exp b/gdb/testsuite/gdb.python/py-format-string.exp
index f809ef3..792d60c 100644
--- a/gdb/testsuite/gdb.python/py-format-string.exp
+++ b/gdb/testsuite/gdb.python/py-format-string.exp
@@ -24,6 +24,11 @@ if [get_compiler_info c++] {
     return -1
 }
 
+# Skip all tests if Python scripting is not enabled.
+gdb_exit
+gdb_start
+if { [skip_python_tests] } { continue }
+
 # Build inferior to language specification.
 proc build_inferior {exefile lang} {
   global srcdir subdir srcfile testfile hex
@@ -45,9 +50,6 @@ proc prepare_gdb {exefile} {
   gdb_reinitialize_dir $srcdir/$subdir
   gdb_load ${exefile}
 
-  # Skip all tests if Python scripting is not enabled.
-  if { [skip_python_tests] } { continue }
-
   if ![runto_main] then {
       perror "couldn't run to breakpoint"
       return