fix cli crash when checking baseline file if there are no files

DetachHead · Sep 22, 2024 · 98122f0 · 98122f0
1 parent 8be1739
commit 98122f0
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/pyright-internal/src/pyright.ts b/packages/pyright-internal/src/pyright.ts
@@ -472,7 +472,7 @@ const outputResults = (
     // --writebaseline
     if (
         args.writebaseline ||
-        !filteredDiagnostics.map((fileWithDiagnostics) => fileWithDiagnostics.diagnostics.length).reduce(add)
+        !filteredDiagnostics.map((fileWithDiagnostics) => fileWithDiagnostics.diagnostics.length).reduce(add, 0)
     ) {
         const previousBaseline = getBaselinedErrors(service.fs, rootDir);
         const newBaseline = writeDiagnosticsToBaselineFile(service.fs, rootDir, results.diagnostics, false);