Stack underflow with generators

[Maltysen]

I'm using quickjs to run some javascript that has been run through the closure compiler and I got the error InternalError: stack underflow (op=132, pc=1454). This seems to be the op code for OP_iterator_close_return. I noticed some unsure comments in the quickjs source where this was emitted, but I don't understand the code well enough to debug this.

Changing closure to output es2017 so it could use native async/await and avoid generators lets the code run fine, so its something related to closure's shim for async/await.

I wanted to try isolating the error, but the project is large and i don't know how to interpret the program counter the pc= refers to. If someone could help me with that, I'll try isolating the error.

(Running with asan/ubsan gave some null pointer and other errors, but they seem unrelated, and prolly exist in normal operation).

P.S: quickjs is awesome and u guys r awesome for building it :)

[bellard]

sorry but without a source code reproducing the error it is not possible to help

[bellard]

The last commits should fix your issue