$ go env
GOOS="darwin"
GOARCH="amd64"

[Trace - 1:49:29 PM] Sending notification 'textDocument/didChange'.
Params: {"textDocument":{"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go","version":6},"contentChanges":[{"text":"// Copyright 2019 The Go Authors. All rights reserved.\n// Use of this source code is governed by a BSD-style\n// license that can be found in the LICENSE file.\n\npackage span\n\nimport (\n\t\"encoding/json\"\n\t\"fmt\"\n\t\"path\"\n)\n\n// Span represents a source code range in standardized form.\ntype Span struct {\n\tv span\n}\n\n// Point represents a single point within a file.\n// In general this should only be used as part of a Span, as on its own it\n// does not carry enough information.\ntype Point struct {\n\tv point\n}\n\ntype span struct {\n\tURI   URI   `json:\"uri\"`\n\tStart point `json:\"start\"`\n\tEnd   point `json:\"end\"`\n}\n\ntype point struct {\n\tLine   int `json:\"line\"`\n\tColumn int `json:\"column\"`\n\tOffset int `json:\"offset\"`\n}\n\nvar invalidPoint = Point{v: point{Line: 0, Column: 0, Offset: -1}}\n\n// Converter is the interface to an object that can convert between line:column\n// and offset forms for a single file.\ntype Converter interface {\n\t//ToPosition converts from an offset to a line:column pair.\n\tToPosition(offset int) (int, int, error)\n\t//ToOffset converts from a line:column pair to an offset.\n\tToOffset(line, col int) (int, error)\n}\n\nfunc New(uri URI, start Point, end Point) Span {\n\ts := Span{v: span{URI: uri, Start: start.v, End: end.v}}\n\ts.v.clean()\n\treturn s\n}\n\nfunc NewPoint(line, col, offset int) Point {\n\tp := Point{v: point{Line: line, Column: col, Offset: offset}}\n\tp.v.clean()\n\treturn p\n}\n\nfunc Compare(a, b Span) int {\n\tif r := CompareURI(a.URI(), b.URI()); r != 0 {\n\t\treturn r\n\t}\n\tif r := comparePoint(a.v.Start, b.v.Start); r != 0 {\n\t\treturn r\n\t}\n\treturn comparePoint(a.v.End, b.v.End)\n}\n\nfunc ComparePoint(a, b Point) int {\n\treturn comparePoint(a.v, b.v)\n}\n\nfunc comparePoint(a, b point) int {\n\tif !a.hasPosition() {\n\t\tif a.Offset < b.Offset {\n\t\t\treturn -1\n\t\t}\n\t\tif a.Offset > b.Offset {\n\t\t\treturn 1\n\t\t}\n\t\treturn 0\n\t}\n\tif a.Line < b.Line {\n\t\treturn -1\n\t}\n\tif a.Line > b.Line {\n\t\treturn 1\n\t}\n\tif a.Column < b.Column {\n\t\treturn -1\n\t}\n\tif a.Column > b.Column {\n\t\treturn 1\n\t}\n\treturn 0\n}\n\nfunc (s Span) HasPosition() bool             { return s.v.Start.hasPosition() }\nfunc (s Span) HasOffset() bool               { return s.v.Start.hasOffset() }\nfunc (s Span) IsValid() bool                 { return s.v.Start.isValid() }\nfunc (s Span) IsPoint() bool                 { return s.v.Start == s.v.End }\nfunc (s Span) URI() URI                      { return s.v.URI }\nfunc (s Span) Start() Point                  { return Point{s.v.Start} }\nfunc (s Span) End() Point                    { return Point{s.v.End} }\nfunc (s *Span) MarshalJSON() ([]byte, error) { return json.Marshal(&s.v) }\nfunc (s *Span) UnmarshalJSON(b []byte) error { return json.Unmarshal(b, &s.v) }\n\nfunc (p Point) HasPosition() bool             { return p.v.hasPosition() }\nfunc (p Point) HasOffset() bool               { return p.v.hasOffset() }\nfunc (p Point) IsValid() bool                 { return p.v.isValid() }\nfunc (p *Point) MarshalJSON() ([]byte, error) { return json.Marshal(&p.v) }\nfunc (p *Point) UnmarshalJSON(b []byte) error { return json.Unmarshal(b, &p.v) }\nfunc (p Point) Line() int {\n\tif !p.v.hasPosition() {\n\t\tpanic(fmt.Errorf(\"position not set in %v\", p.v))\n\t}\n\treturn p.v.Line\n}\nfunc (p Point) Column() int {\n\tif !p.v.hasPosition() {\n\t\tpanic(fmt.Errorf(\"position not set in %v\", p.v))\n\t}\n\treturn p.v.Column\n}\nfunc (p Point) Offset() int {\n\tif !p.v.hasOffset() {\n\t\tpanic(fmt.Errorf(\"offset not set in %v\", p.v))\n\t}\n\treturn p.v.Offset\n}\n\nfunc (p point) hasPosition() bool { return p.Line > 0 }\nfunc (p point) hasOffset() bool   { return p.Offset >= 0 }\nfunc (p point) isValid() bool     { return p.hasPosition() || p.hasOffset() }\nfunc (p point) isZero() bool {\n\treturn (p.Line == 1 && p.Column == 1) || (!p.hasPosition() && p.Offset == 0)\n}\n\nfunc (s *span) clean() {\n\t//this presumes the points are already clean\n\tif !s.End.isValid() || (s.End == point{}) {\n\t\ts.End = s.Start\n\t}\n}\n\nfunc (p *point) clean() {\n\tif p.Line < 0 {\n\t\tp.Line = 0\n\t}\n\tif p.Column <= 0 {\n\t\tif p.Line > 0 {\n\t\t\tp.Column = 1\n\t\t} else {\n\t\t\tp.Column = 0\n\t\t}\n\t}\n\tif p.Offset == 0 && (p.Line > 1 || p.Column > 1) {\n\t\tp.Offset = -1\n\t}\n}\n\n// Format implements fmt.Formatter to print the Location in a standard form.\n// The format produced is one that can be read back in using Parse.\nfunc (s Span) Format(f fmt.State, c rune) {\n\tfullForm := f.Flag('+')\n\tpreferOffset := f.Flag('#')\n\t// we should always have a uri, simplify if it is file format\n\t//TODO: make sure the end of the uri is unambiguous\n\turi := string(s.v.URI)\n\tif c == 'f' {\n\t\turi = path.Base(uri)\n\t} else if !fullForm {\n\t\tif filename, err := s.v.URI.Filename(); err == nil {\n\t\t\turi = filename\n\t\t}\n\t}\n\tfmt.Fprint(f, uri)\n\tif !s.IsValid() || (!fullForm && s.v.Start.isZero() && s.v.End.isZero()) {\n\t\treturn\n\t}\n\t// see which bits of start to write\n\tprintOffset := s.HasOffset() && (fullForm || preferOffset || !s.HasPosition())\n\tprintLine := s.HasPosition() && (fullForm || !printOffset)\n\tprintColumn := printLine && (fullForm || (s.v.Start.Column > 1 || s.v.End.Column > 1))\n\tfmt.Fprint(f, \":\")\n\tif printLine {\n\t\tfmt.Fprintf(f, \"%d\", s.v.Start.Line)\n\t}\n\tif printColumn {\n\t\tfmt.Fprintf(f, \":%d\", s.v.Start.Column)\n\t}\n\tif printOffset {\n\t\tfmt.Fprintf(f, \"#%d\", s.v.Start.Offset)\n\t}\n\t// start is written, do we need end?\n\tif s.IsPoint() {\n\t\treturn\n\t}\n\t// we don't print the line if it did not change\n\tprintLine = fullForm || (printLine && s.v.End.Line > s.v.Start.Line)\n\tfmt.Fprint(f, \"-\")\n\tif printLine {\n\t\tfmt.Fprintf(f, \"%d\", s.v.End.Line)\n\t}\n\tif printColumn {\n\t\tif printLine {\n\t\t\tfmt.Fprint(f, \":\")\n\t\t}\n\t\tfmt.Fprintf(f, \"%d\", s.v.End.Column)\n\t}\n\tif printOffset {\n\t\tfmt.Fprintf(f, \"#%d\", s.v.End.Offset)\n\t}\n}\n\nfunc (s Span) WithPosition(c Converter) (Span, error) {\n\tif err := s.update(c, true, false); err != nil {\n\t\treturn Span{}, err\n\t}\n\treturn s, nil\n}\n\nfunc (s Span) WithOffset(c Converter) (Span, error) {\n\tif err := s.update(c, false, true); err != nil {\n\t\treturn Span{}, err\n\t}\n\treturn s, nil\n}\n\nfunc (s Span) WithAll(c Converter) (Span, error) {\n\tif err := s.update(c, true, true); err != nil {\n\t\treturn Span{}, err\n\t}\n\treturn s, nil\n}\n\nfunc (s *Span) update(c Converter, withPos, withOffset bool) error {\n\tif !s.IsValid() {\n\t\treturn fmt.Errorf(\"cannot add information to an invalid span\")\n\t}\n\tif withPos && !s.HasPosition() {\n\t\tif err := s.v.Start.updatePosition(c); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif s.v.End.Offset == s.v.Start.Offset {\n\t\t\ts.v.End = s.v.Start\n\t\t} else if err := s.v.End.updatePosition(c); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\tif withOffset && (!s.HasOffset() || (s.v.End.hasPosition() && !s.v.End.hasOffset())) {\n\t\tif err := s.v.Start.updateOffset(c); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif s.v.End.Line == s.v.Start.Line && s.v.End.Column == s.v.Start.Column {\n\t\t\ts.v.End.Offset = s.v.Start.Offset\n\t\t} else if err := s.v.End.updateOffset(c); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc (p *point) updatePosition(c Converter) error {\n\tline, col, err := c.ToPosition(p.Offset)\n\tif err != nil {\n\t\treturn err\n\t}\n\tp.Line = line\n\tp.Column = col\n\treturn nil\n}\n\nfunc (p *point) updateOffset(c Converter) error {\n\toffset, err := c.ToOffset(p.Line, p.Column)\n\tif err != nil {\n\t\treturn err\n\t}\n\tp.Offset = offset\n\treturn nil\n}\n"}]}
[Trace - 1:49:29 PM] Sending request 'textDocument/rangeFormatting - (17)'.

Params: {"textDocument":{"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go"},"range":{"start":{"line":251,"character":46},"end":{"line":251,"character":57}},"options":{"tabSize":4,"insertSpaces":false}}
[Trace - 1:49:29 PM] Received notification 'window/logMessage'.

Params: {"type":4,"message":"didChange: file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go"}
didChange: file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go

[Trace - 1:49:29 PM] Received notification 'textDocument/publishDiagnostics'.

Params: {"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/token112.go","diagnostics":[]}
[Trace - 1:49:29 PM] Received notification 'textDocument/publishDiagnostics'.

Params: {"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/uri.go","diagnostics":[]}
[Trace - 1:49:29 PM] Received notification 'textDocument/publishDiagnostics'.

Params: {"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/utf16.go","diagnostics":[]}
[Trace - 1:49:29 PM] Received notification 'textDocument/publishDiagnostics'.

Params: {"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/parse.go","diagnostics":[]}
[Trace - 1:49:29 PM] Received notification 'textDocument/publishDiagnostics'.

Params: {"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go","diagnostics":[]}
[Trace - 1:49:29 PM] Received notification 'textDocument/publishDiagnostics'.

Params: {"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/token.go","diagnostics":[]}
[Trace - 1:49:29 PM] Received response 'textDocument/rangeFormatting - (17)' in 127ms.

Params: [{"range":{"start":{"line":0,"character":0},"end":{"line":282,"character":0}},"newText":""},{"range":{"start":{"line":282,"character":0},"end":{"line":282,"character":0}},"newText":"hasPosition"}]
[Trace - 1:49:30 PM] Sending notification 'textDocument/didChange'.

Params: {"textDocument":{"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go","version":7},"contentChanges":[{"text":"hasPosition"}]}
[Trace - 1:49:30 PM] Received notification 'window/logMessage'.

Params: {"type":4,"message":"didChange: file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go"}
didChange: file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go

[Trace - 1:49:30 PM] Sending request 'textDocument/codeAction - (18)'.

Params: {"textDocument":{"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go"},"range":{"start":{"line":0,"character":0},"end":{"line":0,"character":0}},"context":{"diagnostics":[]}}
[Trace - 1:49:30 PM] Sending request 'textDocument/documentSymbol - (19)'.

Params: {"textDocument":{"uri":"file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go"}}
[Trace - 1:49:31 PM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"invalid position for file "}
[Error - 13:49:31] invalid position for file

[Trace - 1:49:31 PM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"invalid position for file "}
[Error - 13:49:31] invalid position for file

[Trace - 1:49:31 PM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"invalid position for file "}
[Error - 13:49:31] invalid position for file

[Trace - 1:49:31 PM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"invalid position for file "}
[Error - 13:49:31] invalid position for file

[Error - 1:49:31 PM] send textDocument/codeAction#18 no file information for file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go
[Error - 13:49:31] Request textDocument/codeAction failed.

Message: no file information for file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go

Code: 0

[Trace - 1:49:32 PM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"invalid position for file "}
[Error - 13:49:32] invalid position for file

[Error - 1:49:32 PM] send textDocument/documentSymbol#19 no file information for file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go
[Error - 13:49:32] Request textDocument/documentSymbol failed.

Message: no file information for file:///Users/idanilkin/Go/src/golang.org/x/tools/internal/span/span.go

Code: 0