[Bug guile/26533] FAIL: gdb.guile/scm-type.exp: lang_c: test_fields: cast to array with two arguments

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26533

--- Comment #10 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #9)
> (In reply to Ludovic Courtès from comment #8)
> > I tried running the tests under 'rr'
> 
> Is that https://rr-project.org/ ?
> 
> > but that seems to prevent GDB from
> > spawning the inferior or something:
> > 
> >   FAIL: gdb.guile/scm-type.exp: can't run to main
> > 
> > Is there a trick to achieve that?
> 
> Can you show how you tried this?

OK, I managed, using:
...
@@ -1895,6 +1895,8 @@ proc gdb_file_cmd { arg } {
     }                                                                          
 }                                                                              

+set GDB "rr $GDB"                                                              
+                                                                               
 # Default gdb_spawn procedure.                                                 

 proc default_gdb_spawn { } {                                                  
              ...

Then, I made it clear we're running into a timeout:
...
@@ -689,7 +689,7 @@ proc runto { function args } {
 # If you don't want that, use gdb_start_cmd.                                   

 proc runto_main { } {                                                          
-    return [runto main no-message]                                             
+    return [runto main message]                                                
 }                                                                              

 ### Continue, and expect to hit a breakpoint.                                  
...
such that we get:
...
FAIL: gdb.guile/scm-type.exp: running to main in runto (timeout)
FAIL: gdb.guile/scm-type.exp: can't run to main
...


I've then tried to increase the timeout to:
...
@@ -632,7 +632,7 @@ proc runto { function args } {

     # the "at foo.c:36" output we get with -g.
     # the "in func" output we get without -g.
-    gdb_expect 30 {
+    gdb_expect 600 {
        -re "Break.* at .*:$decimal.*$gdb_prompt $" {
            if { $print_pass } {
                pass $test_name
...
but I haven't found a value yet that works.

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