master 534e631: Avoid segfault in command-modes

[Basil L. Contovounesios]

branch: master
commit 534e631b00a3b065016df23aa0f6b7d043e9ed86
Author: Basil L. Contovounesios <contovob@tcd.ie>
Commit: Basil L. Contovounesios <contovob@tcd.ie>

    Avoid segfault in command-modes
    
    * src/data.c (Fcommand_modes): Check that bytecode object is
    interactive before accessing its interactive spec to avoid
    segfaulting (bug#50376).
---
 src/data.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/data.c b/src/data.c
index ffca7e7..27b642d 100644
--- a/src/data.c
+++ b/src/data.c
@@ -1045,6 +1045,8 @@ The value, if non-nil, is a list of mode name symbols.  
*/)
 
   if (COMPILEDP (fun))
     {
+      if (PVSIZE (fun) <= COMPILED_INTERACTIVE)
+       return Qnil;
       Lisp_Object form = AREF (fun, COMPILED_INTERACTIVE);
       if (VECTORP (form))
        /* New form -- the second element is the command modes. */