fix sourceMapTraceback (#1087)

GlassBricks · web-flow · commit 716a2373f9f2 · 2021-08-15T21:44:45.000+02:00
Co-authored-by: Benjamin Ye &lt;24237065+enjoydambience@users.noreply.github.com&gt;
diff --git a/src/lualib/SourceMapTraceBack.ts b/src/lualib/SourceMapTraceBack.ts
@@ -1,5 +1,6 @@
 // TODO: In the future, change this to __TS__RegisterFileInfo and provide tstl interface to
 // get some metadata about transpilation.
+declare function __TS__originalTraceback(this: void, thread?: LuaThread, message?: string, level?: number);
 function __TS__SourceMapTraceBack(this: void, fileName: string, sourceMap: { [line: number]: number }): void {
     globalThis.__TS__sourcemap = globalThis.__TS__sourcemap || {};
     globalThis.__TS__sourcemap[fileName] = sourceMap;
diff --git a/test/unit/printer/sourcemaps.spec.ts b/test/unit/printer/sourcemaps.spec.ts
@@ -272,6 +272,15 @@ test("sourceMapTraceback saves sourcemap in _G", () => {
     }
 });
 
+test("sourceMapTraceback gives traceback", () => {
+    const builder = util.testFunction`
+        return (debug.traceback as (this: void)=>string)();
+    `.setOptions({ sourceMapTraceback: true, luaLibImport: tstl.LuaLibImportKind.Inline });
+
+    const traceback = builder.getLuaExecutionResult();
+    expect(traceback).toEqual(expect.any(String));
+});
+
 test("Inline sourcemaps", () => {
     const code = `
         function abc() {
