From ebc95adddda44121978faaa7fbfda042482c4631 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ari=20Perkki=C3=B6?= <ari.perkkio@gmail.com>
Date: Fri, 27 Jan 2023 13:33:10 +0200
Subject: [PATCH] fix(coverage): istanbul crashes when no tests were run
 (#2753)

---
 packages/coverage-istanbul/src/provider.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/coverage-istanbul/src/provider.ts b/packages/coverage-istanbul/src/provider.ts
index 377c64ea3d15..9f019d40dfba 100644
--- a/packages/coverage-istanbul/src/provider.ts
+++ b/packages/coverage-istanbul/src/provider.ts
@@ -105,7 +105,7 @@ export class IstanbulCoverageProvider implements CoverageProvider {
       const map = libCoverage.createCoverageMap(coverage)
       map.merge(previousCoverageMap)
       return map
-    }, {})
+    }, libCoverage.createCoverageMap({}))
 
     if (this.options.all && allTestsRun)
       await this.includeUntestedFiles(mergedCoverage)