Okay, let's see. The user is reporting a problem with QEMU where, after a specific commit, the SSL connections using curl on amd64 emulation are breaking. The error is about a bad signature in the SSL routines. The aarch64 version works fine, and the previous commit works too. So the issue is introduced in that commit. First, I need to figure out what category this falls into. The options are instruction, syscall, or runtime. The error message is related to SSL processing during a key exchange. This seems like it's happening during the execution of the program, not necessarily a wrong instruction. The commit might have changed how system calls are handled or something related to the runtime environment. Wait, SSL errors can be due to various factors. Maybe the QEMU commit changed something related to how the TLS/SSL libraries are handled in the emulated environment. Since the problem occurs during the runtime execution of the program, it's probably a runtime error. The error is happening when the SSL library is processing the key exchange, which is part of the program's execution, not a specific syscall or instruction. Syscall would be if there's a system call that's failing, but the error here is from the SSL library, which is user-space. So it's more likely a runtime issue. The QEMU change might have affected how certain cryptographic operations are handled in the emulated environment, leading to the bad signature error. Therefore, the category should be runtime. runtime