runtime error: invalid memory address or nil pointer dereference

[1000-mikhail]

./RealiTLScanner -addr [REDACTED_IP]
time=[timestamp] level=WARN msg="Cannot open Country.mmdb" err="open Country.mmdb: no such file or directory"
time=[timestamp] level=INFO msg="Started all scanning threads"
time=[timestamp] level=INFO msg="Enable infinite mode" init=[REDACTED_IP]
time=[timestamp] level=INFO msg="Connected to target" feasible=true ip=[REDACTED_IP] origin=[REDACTED_IP] tls="TLS 1.3" alpn=h2 curve=X25519MLKEM768 cert-length="2942(certs count: 2)" cert-signature=SHA256-RSA cert-publickey=RSA cert-domain=*.outturner.com cert-issuer="GlobalSign nv-sa" geo=N/A
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x90 pc=0x67fc64]

goroutine 11 [running]:
main.ScanTLS({{0x19405336a2e8, 0x10, 0x18}, {0x1940533646c0, 0xe}, 0x1}, 0x1940533741c0, 0x1940533761e0)
/home/user/RealiTLScanner/scanner.go:89 +0xda4
main.main.func1()
/home/user/RealiTLScanner/main.go:108 +0xc5
created by main.main in goroutine 1
/home/user/RealiTLScanner/main.go:106 +0x129e

System information:
OS: Ubuntu 20.04.6 LTS (Focal Fossa)
Kernel: 5.4.0-156-generic
Go version: go1.26.2 linux/amd64
RealiTLScanner: latest master (2026-05-25 commit)

Additional notes:
The issue did not occur before the post-quantum commit (2026-05-25)

GODEBUG=tlsmlkem=0 does NOT fix the issue in Go 1.26.2

[luckyway7]

Use 0.2.1, I have the same problem on 0.2.2

[R4yya]

Same issue here. The scanner successfully connects to a target, prints certificate information, and then crashes with a nil pointer dereference.

Environment:
OS: macOS 26.5
Go version: go1.26.0 darwin/arm64
commit: 41de8414 (latest master)

time=2026-05-27T11:07:51.187+03:00 level=INFO msg="Enable infinite mode" init=[REDACTED]
time=2026-05-27T11:07:51.187+03:00 level=WARN msg="Cannot open Country.mmdb" err="open Country.mmdb: no such file or directory"
time=2026-05-27T11:07:51.188+03:00 level=INFO msg="Started all scanning threads" time=2026-05-27T11:07:51.188+03:00
time=2026-05-27T11:08:21.406+03:00 level=INFO msg="Connected to target" feasible=true ip=[REDACTED] origin=[REDACTED] tls="TLS 1.3" alpn=h2 curve=X25519 cert-length="3585(certs count: 3)" cert-signature=SHA256-RSA cert-publickey=RSA cert-domain=[REDACTED] cert-issuer="GlobalSign nv-sa" geo=N/A
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x90 pc=0x102758ae4]

goroutine 23 [running]:
main.ScanTLS({{0x6778a2486060, 0x10, 0x18}, {0x6778a24840c0, 0xe}, 0x1}, 0x6778a2384150, 0x6778a23981f0)
        /Users/user/RealiTLScanner/scanner.go:89 +0x9d4
main.main.func1()
        /Users/user/RealiTLScanner/main.go:108 +0x8c
created by main.main in goroutine 1
        /Users/user/RealiTLScanner/main.go:106 +0x1008
exit status 2