From 8da88d6a9b6e01d72527d8d7d65c6f2104026a87 Mon Sep 17 00:00:00 2001
From: Trumeet <yuuta@yuuta.moe>
Date: Fri, 1 Apr 2022 21:45:35 -0700
Subject: Fix illegal free() when error

---
 query.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/query.c b/query.c
index 41aa1e8..cfab2bd 100644
--- a/query.c
+++ b/query.c
@@ -36,6 +36,7 @@ int handle_inline(struct TdUpdateNewInlineQuery *update) {
     memset(results, 0, sizeof(results));
     sqlite3_stmt *stmt;
     int r;
+    bool sys = false;
     if ((r = sqlite3_prepare_v2(db,
                                 "SELECT id, t, url FROM says ORDER BY RANDOM() LIMIT 10;",
                                 -1,
@@ -49,6 +50,7 @@ int handle_inline(struct TdUpdateNewInlineQuery *update) {
         results[0].title = "Error!";
         results[0].text = msg;
         results[0].description = msg;
+        sys = true;
         goto answer;
     }
 
@@ -100,6 +102,7 @@ int handle_inline(struct TdUpdateNewInlineQuery *update) {
         sprintf(results[0].id, "e_nodat");
         results[0].text = "No data is available. Check it out later.\n\n"
                           "https://www.youtube.com/watch?v=dQw4w9WgXcQ";
+        sys = true;
     }
     assert(results[0].title);
     goto answer;
@@ -141,14 +144,16 @@ int handle_inline(struct TdUpdateNewInlineQuery *update) {
                                                 NULL),
                 &cb_answer,
                 NULL);
-        for (i = 0; i < sizeof(results) / sizeof(struct result); i++) {
-            struct result res = results[i];
-            if (!res.title) {
-                break;
+        if (!sys) {
+            for (i = 0; i < sizeof(results) / sizeof(struct result); i++) {
+                struct result res = results[i];
+                if (!res.title) {
+                    break;
+                }
+                free(res.title);
+                if (res.url) free(res.url);
+                free(res.text);
             }
-            free(res.title);
-            if (res.url) free(res.url);
-            free(res.text);
         }
         return r;
     }
-- 
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