Panic seen in google.golang.org/grpc/internal/resolver/delegatingresolver.(*delegatingResolver).updateProxyResolverState #8168
Description
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before submitting your issue.
What version of gRPC are you using?
v1.71.0
What version of Go are you using (go version)?
1.23.7
What operating system (Linux, Windows, …) and version?
Linux
What did you do?
If possible, provide a recipe for reproducing the error.
We are trying to connect to non existing server like test:8882
There is no host/domain like test in the setup. Its just a dummy value to execute some piece of code in unit test.
What did you expect to see?
Test works fine as earlier and there is no panic. v1.69.4 and previous versions did not face this panic issue. So seems to be seeing this post v1.69.4 .
What did you see instead?
Below panic is seen in one of our unit-test:
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x55e73a5a3456]
goroutine 1007 [running]:
google.golang.org/grpc/internal/resolver/delegatingresolver.(*delegatingResolver).updateProxyResolverState(0xc000fc2690, {{0xc00095a080, 0x1, 0x1}, {0x0, 0x0, 0x0}, 0x0, 0x0})
/opt/workspace/test-app/pkg/mod/google.golang.org/grpc@v1.71.0/internal/resolver/delegatingresolver/delegatingresolver.go:274 +0x2b6
google.golang.org/grpc/internal/resolver/delegatingresolver.(*wrappingClientConn).UpdateState(0xc000fd0300?, {{0xc00095a080, 0x1, 0x1}, {0x0, 0x0, 0x0}, 0x0, 0x0})
/opt/workspace/test-app/pkg/mod/google.golang.org/grpc@v1.71.0/internal/resolver/delegatingresolver/delegatingresolver.go:311 +0x68
google.golang.org/grpc/internal/resolver/dns.(*dnsResolver).watcher(0xc000fd0300)
/opt/workspace/test-app/pkg/mod/google.golang.org/grpc@v1.71.0/internal/resolver/dns/dns_resolver.go:212 +0x138
created by google.golang.org/grpc/internal/resolver/dns.(*dnsBuilder).Build in goroutine 1005
/opt/workspace/test-app/pkg/mod/google.golang.org/grpc@v1.71.0/internal/resolver/dns/dns_resolver.go:150 +0x2d9