"Memory Graph Debugger: no serialized memory graph received from LeakAgent" error when using Xcode Memory Graph Debugger

Question

I'm using Xcode 10.2.1 and macOS Catalina Developer Beta 2. Whenever I try to use the Memory Graph debugger, I get this error:

Memory Graph Debugger: no serialized memory graph received from LeakAgent

After that, the loading spinner spins indefinitely.

I've tried the answers recommended under this related question, but unfortunately, none of them worked. I tried to reinstall the app; restart Xcode, the iOS Simulator and my computer; deleted the DerivedData folder, and tried different simulators - none of these worked.

score 25 · Answer 1 · answered Dec 02 '19 at 06:12

25

I've observed the same error when did try to start memory graph using Xcode 11.2.1 (macOS Catalina 10.15.1) and iOS 12.2 Simulator.

Starting memory graph debugger with latest simulators (iOS 13.2.2) works fine.

answered Dec 02 '19 at 06:12

Ilia

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I think this answer should be selected as the best answer. I checked and indeed it works on iOS 13.2.2, but does not on iOS 12.2. – Simon Moshenko Jan 23 '20 at 14:20
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The old sims should still work tho. This is an Apple bug! – CommaToast Mar 06 '20 at 01:52
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Well I need to test leaks in a feature for an older iOS version. – Pedro Paulo Amorim May 13 '20 at 20:23
@PedroPauloAmorim you might try to use instruments -> leaks instead – Ilia May 14 '20 at 06:26
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@ilya It crashes when I stop recording. – Pedro Paulo Amorim May 14 '20 at 11:30

Tamás Sengel · Answer 2 · 2020-01-08T15:47:18.317

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You should use a physical device rather than a simulator to avoid this error.

edited Jan 08 '20 at 15:47

answered Jun 21 '19 at 23:30

Tamás Sengel

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I am getting this with a physical device running iOS 13 and Xcode 11.4.1. – Pedro Paulo Amorim May 04 '20 at 15:52
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The `leaks` command line tool does not work on a *physical device*. – gran_profaci May 05 '20 at 05:48
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This answer implies that using the simulator is somehow erroneous, which it isn't. This issue _shouldn't_ occur when using the simulator, but it appears to be the result of a bug: https://developer.apple.com/forums/thread/115628 – Andrew Dunn Oct 16 '20 at 10:33

score 12 · Answer 3 · answered Apr 29 '21 at 06:05

Faced the same issue recently after updating to Xcode 12.5 while being on macOS 11.2.3

The release notes for Xcode 12.5 mention:

In macOS 11.2 or earlier, leaks and other command line analysis tools fail or crash when run against processes built with Mac Catalyst and processes running in iOS 14.5 or later on simulated devices. (74690398)

Updating to macOS 11.3 helped resolve this issue with the leakagent.

score 8 · Answer 4 · edited Apr 16 '21 at 14:30

8

The above answers didn't work for me. But this one did. As the linked answer mentioned:

Disable the address sanitizer
Enable the malloc stack

edited Apr 16 '21 at 14:30

Iulian Onofrei

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answered Mar 10 '20 at 22:17

MobileDev

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Drobs · Answer 5 · 2021-04-30T14:40:35.967

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This just happened to me with iOS version 14.5 after the Xcode update.

If you download another working simulator (e.g. the previous version), you can get the graph from that version.

Downloading Simulators can be done from the bottom of the device selector:

edited Apr 30 '21 at 14:40

answered Apr 30 '21 at 14:35

Drobs

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score 0 · Answer 6 · answered Jan 26 '21 at 19:40

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My issue was that I was using a simulator for iOS 12 while latest was iOS 14

answered Jan 26 '21 at 19:40

altagir

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"Memory Graph Debugger: no serialized memory graph received from LeakAgent" error when using Xcode Memory Graph Debugger

6 Answers6