Ensure grecs_preproc reentrancy after grecs_preproc_done

* src/preproc.c (grecs_preproc_done): Reset static variables after free.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/preproc.c b/src/preproc.c
index 183af3a..08b963a 100644
--- a/src/preproc.c
+++ b/src/preproc.c
@@ -653,9 +653,19 @@ void
 grecs_preproc_done()
 {
         grecs_symtab_free(incl_sources);
+        incl_sources = NULL;
+
         grecs_free(linebuf);
+        linebuf = NULL;
+        bufsize = 0;
+        
         grecs_free(putback_buffer);
+        putback_buffer = NULL;
+        putback_size = putback_max = 0;
+        
         free(linebufbase); /* Allocated via standard malloc/realloc */
+        linebufbase = NULL;
+        linebufsize = 0;
 }
 
 int