Bug IL2CPP build for Steam Deck crashes with "Aborted (core dumped)", but Mono build works fine

I'm building my game for Linux, and decided to test a build of it on my Steam Deck (which runs a modified version of Arch Linux). However, I don't get very far with IL2CPP builds; when I run my game, I get the following output:

Code (csharp):

1. [UnityMemory] Configuration Parameters - Can be set up in boot.config
2.     "memorysetup-bucket-allocator-granularity=16"
3.     "memorysetup-bucket-allocator-bucket-count=8"
4.     "memorysetup-bucket-allocator-block-size=4194304"
5.     "memorysetup-bucket-allocator-block-count=1"
6.     "memorysetup-main-allocator-block-size=16777216"
7.     "memorysetup-thread-allocator-block-size=16777216"
8.     "memorysetup-gfx-main-allocator-block-size=16777216"
9.     "memorysetup-gfx-thread-allocator-block-size=16777216"
10.     "memorysetup-cache-allocator-block-size=4194304"
11.     "memorysetup-typetree-allocator-block-size=2097152"
12.     "memorysetup-profiler-bucket-allocator-granularity=16"
13.     "memorysetup-profiler-bucket-allocator-bucket-count=8"
14.     "memorysetup-profiler-bucket-allocator-block-size=4194304"
15.     "memorysetup-profiler-bucket-allocator-block-count=1"
16.     "memorysetup-profiler-allocator-block-size=16777216"
17.     "memorysetup-profiler-editor-allocator-block-size=1048576"
18.     "memorysetup-temp-allocator-size-main=4194304"
19.     "memorysetup-job-temp-allocator-block-size=2097152"
20.     "memorysetup-job-temp-allocator-block-size-background=1048576"
21.     "memorysetup-job-temp-allocator-reduction-small-platforms=262144"
22.     "memorysetup-temp-allocator-size-background-worker=32768"
23.     "memorysetup-temp-allocator-size-job-worker=262144"
24.     "memorysetup-temp-allocator-size-preload-manager=262144"
25.     "memorysetup-temp-allocator-size-nav-mesh-worker=65536"
26.     "memorysetup-temp-allocator-size-audio-worker=65536"
27.     "memorysetup-temp-allocator-size-cloud-worker=32768"
28.     "memorysetup-temp-allocator-size-gfx=262144"
29. Aborted (core dumped)

This is the output from Player.log:

Code (csharp):

1. Found 1 interfaces on host : 0) 192.168.0.135
2. Multi-casting "[IP] 192.168.0.135 [Port] 55000 [Flags] 2 [Guid] 142416256 [EditorId] 2880511612 [Version] 1048832 [Id] LinuxPlayer(13,192.168.0.135) [Debug] 1 [PackageName] LinuxPlayer [ProjectName] Chromavaders" to [225.0.0.222:54997]...
3. Starting managed debugger on port 56256
4. free(): invalid pointer

It seems to crash very early on, before anything useful is spit out.

Here are some relevant facts:

• Mono builds work fine.
• The output of uname -a on the Deck returns Linux steamdeck 5.13.0-valve21.3-1-neptune #1 SMP PREEMPT Mon, 03 Oct 2022 23:17:36 +0000 x86_64 GNU/Linux.
• I produced the build with Unity 2022.2.0b15 on Windows 10. Note that I'm not using the editor on the Deck, nor do I intend to.
  
• I'm using version 2.0.3 of the com.unity.toolchain.win-x86_64-linux-x86_64 package, plus version 2.0.4 of com.unity.sysroot.
  
• The build was produced with the following BuildOptions flags set:
  • AllowDebugging
  • DetailedBuildReport
  • Development
  • StrictMode
• Managed stripping is set to Low.
• IL2CPP code generation is set to Optimize Size.
  
• IL2CPP compiler configuration is set to Debug.

Running ldd on the game's binary produces the following output:

Code (csharp):

1.         linux-vdso.so.1 (0x00007ffeff4e9000)
2.         UnityPlayer.so => /home/deck/Builds/Chromavaders/Debug/StandaloneLinux64/IL2CPP/./UnityPlayer.so (0x00007f015b785000)
3.         libm.so.6 => /usr/lib/libm.so.6 (0x00007f015b623000)
4.         libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f015b608000)
5.         libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f015b5e7000)
6.         libc.so.6 => /usr/lib/libc.so.6 (0x00007f015b41b000)
7.         libdl.so.2 => /usr/lib/libdl.so.2 (0x00007f015b414000)
8.         librt.so.1 => /usr/lib/librt.so.1 (0x00007f015b407000)
9.         /lib64/ld-linux-x86-64.so.2 => /usr/lib64/ld-linux-x86-64.so.2 (0x00007f015e851000)

Any tips? Is this a bug, or am I doing something wrong?