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go/internal/lsp/regtest
Rob Findley de023d59a5 internal/lsp/protocol: unmarshal to pointers when dispatching requests
With #34111, we are forwarding the LSP from one gopls instance to
another. This exposed an asymmetry in our LSP dispatching: for both
ClientDispatcher and ServerDispatcher, we unmarshal to non-nil response
structs. This means that when forwarding the LSP, we translate empty
JSON responses (corresponding to nil values) into the non-nil zero
value.

This causes problems for some editors, as reported in #37570. Fix it by
instead unmarshaling to a pointer.

This is, of course, a somewhat dangerous change. I fixed the one NPE
that occurred in tests, and have done some mild manual testing.  I
wouldn't be surprised if we discover more NPEs later on, but I still
think this is the right change to make.

Updates golang/go#34111
Fixes golang/go#37570

Change-Id: Ie69e92d2821c829cdfc4f4ab303679a725f1f859
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222058
Reviewed-by: Peter Weinberger <pjw@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-03-05 22:45:36 +00:00
..
definition_test.go internal/lsp/regtest: remove calls to t.Parallel() 2020-02-27 18:46:34 +00:00
diagnostics_test.go internal/lsp/regtest: add a test for diagnostics on first file 2020-03-02 22:55:59 +00:00
env.go internal/lsp/protocol: unmarshal to pointers when dispatching requests 2020-03-05 22:45:36 +00:00
formatting_test.go internal/lsp/regtest: implement formatting and organizeImports 2020-03-02 19:16:53 +00:00
reg_test.go internal/lsp/regtest: clean-up and more error handling 2020-02-25 19:00:36 +00:00
serialization_test.go internal/lsp/protocol: unmarshal to pointers when dispatching requests 2020-03-05 22:45:36 +00:00
shared_test.go internal/lsp/regtest: remove calls to t.Parallel() 2020-02-27 18:46:34 +00:00
wrappers.go internal/lsp/regtest: implement formatting and organizeImports 2020-03-02 19:16:53 +00:00