Duplicate auxdata in legacyAssembly

[manuelwedler]

Description

In Sourcify, we use the legacyAssembly compiler output to find auxdata in the bytecode. We encountered a contract that has the same auxdata twice in the legacyAssembly but this auxdata is only once in the deployedBytecode.

The contract can be found in Sourcify here: https://repo.sourcify.dev/1/0xC8D03C8456B6DD7D32579B4764B01DB2F05B5310

The issue is that we find two occurrences of the a264697066735822122083cc662d6513f67d0b1f903cbaa4084d0b73f05b2f7d3a19f7a4764de12a82bc64736f6c63430008180033 auxdata in the legacyAssembly output. The compiler output can be found here:
duplicate-auxdata.legacyAssembly.json

See ethereum/sourcify#2095 for the Sourcify issue.

Environment

• Compiler version: v0.8.24+commit.e11b9ed9
• Compilation pipeline (legacy, IR, EOF): legacy
• Target EVM version (as per compiler settings): cancun
• Operating system: Linux

Steps to Reproduce

Use solc v0.8.24+commit.e11b9ed9 to compile via this standard json input:
duplicate-auxdata-input.json