Extension host terminated unexpectedly: JavaScript heap out of memory

Environment data

• VS Code version: 1.35.0

• Extension version (available under the Extensions sidebar): XXX

• OS and version: Linux kernel version: 4.19.47; 16gb RAM

• Python version (& distribution if applicable, e.g. Anaconda): 3.7.3

• Type of virtual environment used (N/A | venv | virtualenv | conda | …): No environment

• Relevant/affected Python packages and their versions: - tqdm==4.31.1 - itertools.permutations - numpy==1.16.4

• Jedi or Language Server?: Language Server

Expected behaviour

Run loop through permutations of a list, and successfully fill up numpy array

Actual behaviour

Run multiple times and at different parts of the loop, the extension host fails.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Nothing

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help; turn on source maps to make any tracebacks be useful by running Enable source map support for extension debugging)

workbench.main.js:3311 
FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory 1: 0x55669731a566  
[/usr/lib/electron/electron] 2: 0x55669731a6d5  
[/usr/lib/electron/electron] 3: 0x556694165a27  
[/usr/lib/electron/electron] 4: 0x5566941659bb  
[/usr/lib/electron/electron] 5: 0x55669420ba13  
[/usr/lib/electron/electron] 6: 0x55669420a87d  
[/usr/lib/electron/electron] 7: 0x556694207f81 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) 
[/usr/lib/electron/electron] 8: 0x556694208455  
[/usr/lib/electron/electron] 9: 0x556694213ac0  
[/usr/lib/electron/electron]10: 0x556693df372d v8::internal::Factory::NewRawOneByteString(int, v8::internal::PretenureFlag) 
[/usr/lib/electron/electron]11: 0x556693ec22f8  
[/usr/lib/electron/electron]12: 0x556693ec0e31  
[/usr/lib/electron/electron]13: 0x556693ec39d3  
[/usr/lib/electron/electron]14: 0x556693ec0ef4  
[/usr/lib/electron/electron]15: 0x556693ec42a0  
[/usr/lib/electron/electron]16: 0x556693ec0e8e  
[/usr/lib/electron/electron]17: 0x556693ec39d3  
[/usr/lib/electron/electron]18: 0x556693ec0ef4  
[/usr/lib/electron/electron]19: 0x556693ec39d3  
[/usr/lib/electron/electron]20: 0x556693ec0ef4  
[/usr/lib/electron/electron]21: 0x556693ec42a0  
[/usr/lib/electron/electron]22: 0x556693ec0e8e 
 [/usr/lib/electron/electron]23: 0x556693ec39d3  
[/usr/lib/electron/electron]24: 0x556693ec0ef4  
[/usr/lib/electron/electron]25: 0x556693ec09ed  
[/usr/lib/electron/electron]26: 0x556693b7c317  
[/usr/lib/electron/electron]27: 0x5566943cfe0e  
[/usr/lib/electron/electron]

[amichuda]

This is in the python interactive window

On Thu, Jun 13, 2019, 10:22 AM Kartik Raj [e-mail] wrote:

Can you please inform if you using Python interactive window. Or do you have a python file where this loop runs?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/microsoft/vscode-python/issues/6001?email_source=notifications&email_token=ABQVPBGXG5QSCLQ74QRZGMDP2J66FA5CNFSM4HXT436KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODXUNUSQ#issuecomment-501799498, or mute the thread https://github.com/notifications/unsubscribe-auth/ABQVPBCAY35B3R6RP5NAIB3P2J66FANCNFSM4HXT436A .

[amichuda]

Thank you so much! No apologies needed, you guys are working hard and vacations are NEEDED. Thank you for all the hard work.