From 272dacdbc5e334e6d7c8e918cfffac6f6d556577 Mon Sep 17 00:00:00 2001
From: Michal Piechowiak <misiek.piechowiak@gmail.com>
Date: Wed, 3 May 2023 09:20:13 +0200
Subject: [PATCH] fix(gatsby): handle cyclic chunkgroup children (#38052)

---
 .../gatsby/src/utils/webpack/get-ssr-chunk-hashes.ts   | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/gatsby/src/utils/webpack/get-ssr-chunk-hashes.ts b/packages/gatsby/src/utils/webpack/get-ssr-chunk-hashes.ts
index e8dfcb5ce6f78..f5181020bdc5e 100644
--- a/packages/gatsby/src/utils/webpack/get-ssr-chunk-hashes.ts
+++ b/packages/gatsby/src/utils/webpack/get-ssr-chunk-hashes.ts
@@ -6,8 +6,14 @@ type ChunkGroup = webpack.Compilation["chunkGroups"][0]
 function getHashes(
   chunkGroup: ChunkGroup,
   compilation: webpack.Compilation,
-  hashes: Array<string> = []
+  hashes: Array<string> = [],
+  visitedChunkGroups: Set<ChunkGroup> = new Set()
 ): Array<string> {
+  if (visitedChunkGroups.has(chunkGroup)) {
+    return hashes
+  }
+  visitedChunkGroups.add(chunkGroup)
+
   for (const chunk of chunkGroup.chunks) {
     if (!chunk.hash) {
       throw new Error(
@@ -23,7 +29,7 @@ function getHashes(
     )
 
     if (isNotImportedByAsyncRequires) {
-      getHashes(childChunkGroup, compilation, hashes)
+      getHashes(childChunkGroup, compilation, hashes, visitedChunkGroups)
     }
   }