[groff] 14/17: [troff]: Add paranoia to `token::description()`.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 3672e67199c97f4bd8134a9a32569c446369d343
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sat Aug 5 10:59:47 2023 -0500

    [troff]: Add paranoia to `token::description()`.
    
    * src/roff/troff/input.cpp (token::description): Clear static buffer on
      entry to function to avoid another problem like Savannah #62813.
---
 ChangeLog                | 8 ++++++++
 src/roff/troff/input.cpp | 1 +
 2 files changed, 9 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index d00f67f25..b71cd2a15 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2023-08-05  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       [troff]: Add paranoia to `token::description()`.
+
+       * src/roff/troff/input.cpp (token::description): Clear static
+       buffer on entry to function to avoid another problem like
+       Savannah #62813.
+
 2023-08-05  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        [troff]: Trivially refactor (`define_color`).
diff --git a/src/roff/troff/input.cpp b/src/roff/troff/input.cpp
index ffcee1668..571370faf 100644
--- a/src/roff/troff/input.cpp
+++ b/src/roff/troff/input.cpp
@@ -2505,6 +2505,7 @@ const char *token::description()
 {
   const size_t bufsz = strlen("character 'x'") + 1;
   static char buf[bufsz];
+  (void) memset(buf, 0, bufsz);
   switch (type) {
   case TOKEN_BACKSPACE:
     return "a backspace character";