RuntimeError with WebAssembly in @react-pdf/yoga on Node.js Server about yoga HOT 3 OPEN

This is going to be hard to diagnose without more information about the usage.

The Yoga wasm binary allows heap growth (

Without knowing more, out of memory seems like the consuming library might not be freeing resources, or that there is an irregularly large tree.

from yoga.

Not sure if this is relevant, but in my (browser based) benchmarking scripts where I was constructing, measuring and then destructing Yoga trees in a loop, I was hitting a similar crash. It took quite high iteration count (>10000) to hit it, but it was with a script that in theory shouldn't have increased heap size at all. This also occurred with a similar Taffy-based benchmark at similar iteration counts.

It could perhaps be due to heap fragmentation? Or immaturity of WASM implementations? Although I must admit that I haven't investigated this thoroughly enough to rule out user error.

As a workaround, if this is only occurring after repeated PDF generation, then you could try the following steps (in order):

• Catch the exception
• Deinitialise the WASM module
• Reinitialise the WASM module
• Retry your call into Yoga

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