src/ldebug.js: lineinfo is always an array in JS, check length instead

1 files changed, 3 insertions, 3 deletions

diff --git a/src/ldebug.js b/src/ldebug.js
index ee9c891..4be14dd 100644
--- a/src/ldebug.js
+++ b/src/ldebug.js
@@ -23,7 +23,7 @@ const currentpc = function(ci) {
 };
 
 const currentline = function(ci) {
-    return ci.func.value.p.lineinfo ? ci.func.value.p.lineinfo[currentpc(ci)] : -1;
+    return ci.func.value.p.lineinfo.length !== 0 ? ci.func.value.p.lineinfo[currentpc(ci)] : -1;
 };
 
 /*
@@ -626,10 +626,10 @@ const luaG_traceexec = function(L) {
     if (mask & defs.LUA_MASKLINE) {
         let p = ci.func.value.p;
         let npc = ci.l_savedpc; // pcRel(ci.u.l.savedpc, p);
-        let newline = p.lineinfo ? p.lineinfo[npc] : -1;
+        let newline = p.lineinfo.length !== 0 ? p.lineinfo[npc] : -1;
         if (npc === 0 ||  /* call linehook when enter a new function, */
             ci.l_savedpc <= L.oldpc ||  /* when jump back (loop), or when */
-            newline !== p.lineinfo ? p.lineinfo[L.oldpc] : -1)  /* enter a new line */
+            newline !== p.lineinfo.length !== 0 ? p.lineinfo[L.oldpc] : -1)  /* enter a new line */
             ldo.luaD_hook(L, defs.LUA_HOOKLINE, newline);  /* call line hook */
     }
     L.oldpc = ci.l_savedpc;