gopls: automated issue report (crash)

[hritesh-sonawane]

gopls version: v0.7.1-pre.1
gopls flags:
update flags: proxy
extension version: 2021.7.2819
go version: 1.16.6
environment: Visual Studio Code linux
initialization error: undefined
manual restart count: 0
total start count: 1

ATTENTION: PLEASE PROVIDE THE DETAILS REQUESTED BELOW.

Describe what you observed.

A crash which resulted in no linting for go files. Had to restart VSCode to get things back as it were.

panic: invalid Pos value 181 (should be in [1, 180[)

goroutine 158 [running]:
go/token.(*File).PositionFor(0xc0006979e0, 0xb5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	  position.go:349  0x1a5
golang.org/x/tools/internal/lsp.(*encoded).strStack(0xc00012e460, 0xc00007d220, 0xc000458de8)
	  semantic.go:239  0x2fc
golang.org/x/tools/internal/lsp.(*encoded).unkIdent(0xc00012e460, 0xc00028c9e0)
	  semantic.go:604  0x27c
golang.org/x/tools/internal/lsp.(*encoded).ident(0xc00012e460, 0xc00028c9e0)
	  semantic.go:427  0xe1c
golang.org/x/tools/internal/lsp.(*encoded).inspector(0xc00012e460, 0xfb7b30, 0xc00028c9e0, 0xc00007d101)
	  semantic.go:343  0x32b
golang.org/x/tools/internal/lsp.(*encoded).semantics.func1(0xfb7b30, 0xc00028c9e0, 0xc00042c601)
	  semantic.go:129  0x3e
go/ast.inspector.Visit(0xc00007d130, 0xfb7b30, 0xc00028c9e0, 0xfb4d40, 0xc00007d130)
	  walk.go:373  0x3a
go/ast.Walk(0xfb4d40, 0xc00007d130, 0xfb7b30, 0xc00028c9e0)
	  walk.go:52  0x63
go/ast.Walk(0xfb4d40, 0xc00007d130, 0xfb7a40, 0xc000358e80)
	  walk.go:270  0x76e
go/ast.walkStmtList(0xfb4d40, 0xc00007d130, 0xc00023a480, 0x4, 0x4)
	  walk.go:32  0x9e
go/ast.Walk(0xfb4d40, 0xc00007d130, 0xfb76f8, 0xc000247800)
	  walk.go:224  0x1968
go/ast.Walk(0xfb4d40, 0xc00007d130, 0xfb7a68, 0xc000247830)
	  walk.go:344  0xce6
go/ast.Inspect(...)
	  walk.go:385
golang.org/x/tools/internal/lsp.(*encoded).semantics(0xc00012e460)
	  semantic.go:137  0x3a9
golang.org/x/tools/internal/lsp.(*Server).computeSemanticTokens(0xc00023fc20, 0xfc5d58, 0xc00004c840, 0xc000112ff0, 0x4b, 0xc000248210, 0x0, 0x0, 0x0)
	  semantic.go:116  0x4b7
golang.org/x/tools/internal/lsp.(*Server).semanticTokensRange(...)
	  semantic.go:43
golang.org/x/tools/internal/lsp.(*Server).SemanticTokensRange(0xc00023fc20, 0xfc5d58, 0xc00004c840, 0xc000248200, 0xc000248200, 0x0, 0x0)
	  server_gen.go:220  0x5e
golang.org/x/tools/internal/lsp/protocol.serverDispatch(0xfc5d58, 0xc00004c840, 0xfdcd40, 0xc00023fc20, 0xc000475110, 0xfc5fc0, 0xc00004c740, 0x0, 0x0, 0xfb46e0)
	  tsserver.go:288  0x7be5
golang.org/x/tools/internal/lsp/protocol.ServerHandler.func1(0xfc5d58, 0xc00004c840, 0xc000475110, 0xfc5fc0, 0xc00004c740, 0x0, 0xc039aa594d001894)
	  protocol.go:154  0xc5
golang.org/x/tools/internal/lsp/lsprpc.handshaker.func1(0xfc5d58, 0xc00004c840, 0xc000475110, 0xfc5fc0, 0xc00004c740, 0x0, 0x0)
	  lsprpc.go:506  0x459
golang.org/x/tools/internal/jsonrpc2.MustReplyHandler.func1(0xfc5d58, 0xc00004c840, 0xc00000e750, 0xfc5fc0, 0xc00004c740, 0xc00024efb0, 0x1)
	  handler.go:35  0xd7
golang.org/x/tools/internal/jsonrpc2.AsyncHandler.func1.2(0xc0002943c0, 0xc0003efad0, 0xc0003aa6b0, 0xfc5d58, 0xc00004c840, 0xc00000e750, 0xfc5fc0, 0xc00004c740)
	  handler.go:103  0x86
created by golang.org/x/tools/internal/jsonrpc2.AsyncHandler.func1
	  handler.go:100  0x173
[Error - 11:02:21 AM] 2021/08/01 11:02:21 DocumentSymbols failed: invalid pos
	URI=file:///home/hr7tesh/Gamakichi/Level 1/31/solution.go

[Error - 11:02:21 AM] 

[gopherbot]

Change https://golang.org/cl/339169 mentions this issue: internal/lsp: handle invalid positions in semantic token debug logic