Fix undefined behaviour while looking for lexical-binding file variable (bug 31186)

* src/lread.c (lisp_file_lexically_bound_p): Reset
beg_end_state before reading variable or value.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lread.c b/src/lread.c
index 3104c441ecf..72523c057f1 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -896,6 +896,7 @@ lisp_file_lexically_bound_p (Lisp_Object readcharfun)
             ch = READCHAR;
 
           i = 0;
+          beg_end_state = NOMINAL;
           while (ch != ':' && ch != '\n' && ch != EOF && in_file_vars)
             {
               if (i < sizeof var - 1)
@@ -921,6 +922,7 @@ lisp_file_lexically_bound_p (Lisp_Object readcharfun)
                 ch = READCHAR;
 
               i = 0;
+              beg_end_state = NOMINAL;
               while (ch != ';' && ch != '\n' && ch != EOF && in_file_vars)
                 {
                   if (i < sizeof val - 1)