Properly reset the validation part of the tagging module between files.

This fixes a crash in makewhatis(8) encountered by naddy@.

2 files changed, 5 insertions, 0 deletions

diff --git a/read.c b/read.c
index 527ecf9f..845976e8 100644
--- a/read.c
+++ b/read.c
@@ -678,11 +678,13 @@ mparse_alloc(int options, enum mandoc_os os_e, const char *os_s)
 void
 mparse_reset(struct mparse *curp)
 {
+	tag_free();
 	roff_reset(curp->roff);
 	roff_man_reset(curp->man);
 	free_buf_list(curp->secondary);
 	curp->secondary = NULL;
 	curp->gzip = 0;
+	tag_alloc();
 }
 
 void
diff --git a/tag.c b/tag.c
index 0db354c1..50502e58 100644
--- a/tag.c
+++ b/tag.c
@@ -59,6 +59,8 @@ tag_free(void)
 	struct tag_entry	*entry;
 	unsigned int		 slot;
 
+	if (tag_data.info.free == NULL)
+		return;
 	entry = ohash_first(&tag_data, &slot);
 	while (entry != NULL) {
 		free(entry->nodes);
@@ -66,6 +68,7 @@ tag_free(void)
 		entry = ohash_next(&tag_data, &slot);
 	}
 	ohash_delete(&tag_data);
+	tag_data.info.free = NULL;
 }
 
 /*