esp32 E.openFile stops working after multiple fs.readFile and fs.writeFile

Hi,
using your original code - I can replicate the issue - it stops after 15 iterations.

I suspected that memory was leaking so intially added a line to print free memory - as I suspected that this was the problem.

https://github.com/espruino/Espruino/blob/e06b3e24de42adb1de6e2cc6046e525880760e7d/libs/filesystem/jswrap_file.c#L277

the issue we have is if there is a failure - 0 is returned and we don't know which error occured or where...

However in debugging - I found a work around.
In the function - calling f=process.memory().free; seems to work. All I can think that is occuring here is it perhaps a garbage collection is occuring - @Gordon - any ideas?

var fs = require('fs');
function writeData(i){
  // line below allows this to run!
  f=process.memory().free;
  //console.log(process.memory().free );
  if(i < 40){
   var data = Math.random().toString();
   var name = `file_${i}`;
   var res = fs.writeFile(name, data);
   if(res){
     console.log(`wrote... ${name}, ${data}`);
     setTimeout(function(){
       writeData(i + 1);
     }, 100);
   }
   else{
     console.log(`did not write!, ${name}, ${data}`);
   }
  }
}
writeData(0);

WARNING: gap set scan error code = 103
WARNING: set rssi scan not implemeted yet
wrote... file_0, 0.67312209572
wrote... file_1, 0.85650798066
wrote... file_2, 0.11667447496
wrote... file_3, 0.98353582061
wrote... file_4, 0.55870476251
wrote... file_5, 0.06997160197
wrote... file_6, 0.05838990447
wrote... file_7, 0.31009601164
wrote... file_8, 0.35821451589
wrote... file_9, 0.24528766667
wrote... file_10, 0.51275360515
wrote... file_11, 0.04978711532
wrote... file_12, 0.76238244714
wrote... file_13, 0.11774935718
wrote... file_14, 0.99340898217
wrote... file_15, 0.39304630709
wrote... file_16, 0.48263351408
wrote... file_17, 0.02755051107
wrote... file_18, 0.68166789304
wrote... file_19, 0.64597696841
wrote... file_20, 0.14027355012
wrote... file_21, 0.73948647814
wrote... file_22, 0.17078908633
wrote... file_23, 0.49875334300
wrote... file_24, 0.60857436741
wrote... file_25, 0.09730707253
wrote... file_26, 0.89388832072
wrote... file_27, 0.05864839910
wrote... file_28, 0.26445292693
wrote... file_29, 0.35654671180
wrote... file_30, 0.41393465335
wrote... file_31, 0.37957622081
wrote... file_32, 0.37698324787
wrote... file_33, 0.14988256066
wrote... file_34, 0.04350866705
wrote... file_35, 0.31650148859
wrote... file_36, 0.23993254836
wrote... file_37, 0.81480026189
wrote... file_38, 0.59223879482
wrote... file_39, 0.37215752032
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