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Loop of console.log causes out of memory #3524

@tforgione

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@tforgione

The other day, I went through something that I didn't understand in node.

var i = 0;
for(;;)
    console.log(i++)

When I do this, at a certain moment, my nodejs just stops printing stuff, giving me an output that looks like this

[...]
684665
684666
684667

And after a while, I got this :

<--- Last few GCs --->

   69097 ms: Scavenge 1397.2 (1456.7) -> 1397.2 (1456.7) MB, 0.8 / 0 ms (+ 1.7 ms in 1 steps since last GC) [allocation failure] [incremental marking delaying mark-sweep].
   70462 ms: Mark-sweep 1397.2 (1456.7) -> 1396.0 (1456.7) MB, 1364.9 / 0 ms (+ 2.8 ms in 2 steps since start of marking, biggest step 1.7 ms) [last resort gc].
   71833 ms: Mark-sweep 1396.0 (1456.7) -> 1397.1 (1456.7) MB, 1370.2 / 0 ms [last resort gc].


<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 0xcdf79d37399 <JS Object>
    1: formatPrimitive(aka formatPrimitive) [util.js:~411] [pc=0x634d9f4113f] (this=0xcdf79d04131 <undefined>,ctx=0x17b18f4d561 <an Object with map 0x32fd25043ef9>,value=16248021)
    2: formatValue(aka formatValue) [util.js:223] [pc=0x634d9f1fdbb] (this=0xcdf79d04131 <undefined>,ctx=0x17b18f4d561 <an Object with map 0x32fd25043ef9>,value=16248021,recurseTimes=2)
    3: inspect(aka inspect) [uti...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory
[1]    19446 abort (core dumped)  node

I was wondering, what can console.log do that could lead to an out of memory error ?

At first, I asked that question on stackoverflow, but someone suggested that I create an issue here, and I thought it could be a good idea.

What do you think about this ?


EDIT : Apparently, it has also be discussed here

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