[FUZZ] Beaconfuzz_v2 crash-8a2da3488d00f8ddb2694f0e58a352e60df5c813 in attester_slashing

[Daft-Wullie]

I've done and provided the following:

• Checked to see if any other [FUZZ] issue already refers to that crasher
• Attached the crashing input (either attached to the issue as a .zip or .gz, or as a link to a file sharing service)
• Noted the beacon-fuzz version or commit used.
• Provided crash output
• Noted the command or fuzzer used to generate the crash
• Name of the original crash file
• (Optional but optimal) Checked if the crash can be consistently replicated by re-running the input.

Info to Reproduce

• Command run: e.g. ETH2FUZZ_BEACONSTATE=../eth2fuzz/workspace/corpora/beaconstate fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing -artifact_prefix=/home/beacon-fuzz/beaconfuzz_v2/fuzz/artifacts/struct_attester_slashing/ /home/beacon-fuzz/beaconfuzz_v2/fuzz/corpus/struct_attester_slashing/ -detect_leaks=0 -rss_limit_mb=0

• Crasher file name: crash-8a2da3488d00f8ddb2694f0e58a352e60df5c813
  crash-8a2da3488d00f8ddb2694f0e58a352e60df5c813.zip

• Client exercised: N/A

• Fuzzing engine used (if applicable): libfuzzer

Crash output and stacktrace

thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
  left: `false`,
 right: `true`', /home/beacon-fuzz/beaconfuzz_v2/libs/eth2clientsfuzz/src/attester_slashing.rs:39:17
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Traceback (most recent call last, using override)
/home/nimbus-eth2/vendor/nimbus-build-system/vendor/Nim/lib/system/excpt.nim(614) signalHandler
SIGABRT: Abnormal termination.
==1551958== ERROR: libFuzzer: fuzz target exited
    #0 0x5628cc402791  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0xda2791)
    #1 0x5628cee50f70  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x37f0f70)
    #2 0x5628cee65cdb  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x3805cdb)
    #3 0x7fbf42639a26  (/lib/x86_64-linux-gnu/libc.so.6+0x49a26)
    #4 0x7fbf42639bdf  (/lib/x86_64-linux-gnu/libc.so.6+0x49bdf)
    #5 0x5628ccc6558c  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x160558c)
    #6 0x7fbf4263620f  (/lib/x86_64-linux-gnu/libc.so.6+0x4620f)
    #7 0x7fbf4263618a  (/lib/x86_64-linux-gnu/libc.so.6+0x4618a)
    #8 0x7fbf42615858  (/lib/x86_64-linux-gnu/libc.so.6+0x25858)
    #9 0x5628cef1e4b6  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38be4b6)
    #10 0x5628cef06ff5  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38a6ff5)
    #11 0x5628cee444b6  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x37e44b6)
    #12 0x5628cef0ee75  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38aee75)
    #13 0x5628cef0e9f8  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38ae9f8)
    #14 0x5628cef09b1b  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38a9b1b)
    #15 0x5628cef0e9b8  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38ae9b8)
    #16 0x5628cef0e96a  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38ae96a)
    #17 0x5628cc51cf3e  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0xebcf3e)
    #18 0x5628cc4adfda  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0xe4dfda)
    #19 0x5628cee444e0  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x37e44e0)
    #20 0x5628cee4413f  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x37e413f)
    #21 0x5628cee6613c  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x380613c)
    #22 0x5628cee6e2f0  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x380e2f0)
    #23 0x5628cee6ecac  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x380ecac)
    #24 0x5628cee710af  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x38110af)
    #25 0x5628cee42689  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0x37e2689)
    #26 0x5628cc37f346  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0xd1f346)
    #27 0x7fbf426170b2  (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
    #28 0x5628cc37f4ed  (/home/beacon-fuzz/beaconfuzz_v2/fuzz/target/x86_64-unknown-linux-gnu/release/struct_attester_slashing+0xd1f4ed)

SUMMARY: libFuzzer: fuzz target exited
MS: 2 ChangeByte-ChangeBit-; base unit: 1a42949ef5f604f45eb1ad4fbf3840627a6ba9ba
artifact_prefix='/home/beacon-fuzz/beaconfuzz_v2/fuzz/artifacts/struct_attester_slashing/'; Test unit written to /home/beacon-fuzz/beaconfuzz_v2/fuzz/artifacts/struct_attester_slashing/crash-8a2da3488d00f8ddb2694f0e58a352e60df5c813

Your Environment

• Fuzzer ran: beaconfuzz v2
• Version/Commit used:8ba2bc4
• Operating System and version: Ubuntu 20.04

[Daft-Wullie]

unsure if same as #88 , reporting in case it's different