sapper run dev: FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

[btakita]

On a large project which uses pnpm with many packages & sapper run dev, when a file changes, sapper reloads then panics with a FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory error. This issue did not occur over the last few months but has begun occurring.

I'm attempting to run the process using node --max-old-space-size=8192, but ran into issues passing cli arguments directly to nodejs. To fix, I have the script:

#!/bin/sh
cat ./node_modules/.bin/sapper | sed -E 's/(node\"?)(\s+\")/\1 --max-old-space-size=8192 \2/' > ./node_modules/.bin/sapper-himem
chmod a+x ./node_modules/.bin/sapper-himem
./node_modules/.bin/sapper-himem dev

I tried several other solutions but had to use sed to inject cli args to the node process. A proper solution would be to have a way to pass cli args from the sapper script into the node process.

[Maggi64]

Fixed with the latest rollup update 👍

[rohanrichards]

I just updated to rollup 2.58.1 and I'm still getting this. I'm also deploying via heroku, and increasing the --max-old-space-size variable has caused it to just hang (it's been stuck on the build phase for 30 minutes now).

Edit; This only happens to me during a build

[perqa]

Same issue with sveltekit and this package.json

       "devDependencies": {
        "@sveltejs/adapter-netlify": "^1.0.0-next.35",
        "@sveltejs/adapter-node": "^1.0.0-next.55",
        "@sveltejs/adapter-static": "^1.0.0-next.21",
        "@sveltejs/kit": "^1.0.0-next.201",
        "@typescript-eslint/eslint-plugin": "^5.5.0",
        "@typescript-eslint/parser": "^5.5.0",
        "autoprefixer": "^10.4.0",
        "cssnano": "^5.0.12",
        "eslint": "^8.4.0",
        "eslint-config-prettier": "^8.3.0",
        "eslint-plugin-svelte3": "^3.2.1",
        "node-fetch": "^3.1.0",
        "postcss": "^8.4.4",
        "postcss-load-config": "^3.1.0",
        "prettier": "~2.5.1",
        "prettier-plugin-svelte": "^2.5.0",
        "stream": "^0.0.2",
        "svelte": "^3.44.2",
        "svelte-preprocess": "^4.9.8",
        "tailwindcss": "^2.2.19",
        "tslib": "^2.3.1",
        "typescript": "^4.5.2",
        "vite": "^2.6.14"
    },
    "type": "module",
    "engines": {
        "node": ">= 12.17.0"
    },
    "dependencies": {
        "@tailwindcss/line-clamp": "^0.2.2",
        "lrud": "file:../lrud",
        "sapper-environment": "^1.0.1"
    }