[erlang-patches] Optimize handling of local fun variables in v3_kernel

Anthony Ramine <>
Mon Oct 14 12:45:38 CEST 2013

Hello Kostis,

To reproduce the crash, compile the following module with +native with my rm-reverse-eta-conversion branch:


t1() -> fun identity/1.
t2() -> fun identity/2.

identity(X) -> X.

Loading this module compiled with HiPE on my branch will make HiPE crash in patch_funentries. Commenting the t2/0 function out makes the crash disappear. That shows that the cause of the crash is multiple references to the same local function.


Anthony Ramine

Le 8 oct. 2013 à 20:12, Kostis Sagonas <> a écrit :

> Anyway, I am not sure how to contribute here and it will take me quite some time to investigate this from scratch, time which sadly I do not have these days.  I can spend some time on this if I feel like hacking again one of the nights to come, but only if you minimize this and send me a self-contained module that shows the problem when you generate BEAM code with the changed compiler, but not with the vanilla.

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