Merge pull request #6825 from trevor211/fixMemoryLeakAboutLuaScript

Fix memory leak about lua script

src/scripting.c

@@ -2473,6 +2473,7 @@ void ldbEval(lua_State *lua, sds *argv, int argc) {
             ldbLog(sdscatfmt(sdsempty(),"<error> %s",lua_tostring(lua,-1)));
             lua_pop(lua,1);
             sdsfree(code);
+            sdsfree(expr);
             return;
         }
     }

tests/unit/scripting.tcl

@@ -741,3 +741,8 @@ start_server {tags {"scripting repl"}} {
     }
 }
 
+start_server {tags {"scripting"}} {
+    r script debug sync
+    r eval {return 'hello'} 0
+    r eval {return 'hello'} 0
+}