Repository: go
Issue: x/tools/gopls: "file name collision" error after changing the casing of a filename
Labels: NeedsInvestigation

### What version of Go, VS Code & VS Code Go extension are you using?
* Run `go version` to get version of Go from _the VS Code integrated terminal_.
	- `go version go1.16.3 darwin/amd64`
* Run `gopls -v version` to get version of Gopls from _the VS Code integrated terminal_.
<details>
<summary>Output:</summary>

```
	- Build info
----------
golang.org/x/tools/gopls v0.7.1
    golang.org/x/tools/gopls@v0.7.1 h1:Mh3Z8Xcoq3Zy7ksSlwDV/nzQSbjFf06A+L+F8YHq55U=
    github.com/BurntSushi/toml@v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
    github.com/google/go-cmp@v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
    github.com/sergi/go-diff@v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
    golang.org/x/mod@v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
    golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
    golang.org/x/sys@v0.0.0-20210510120138-977fb7262007 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
    golang.org/x/tools@v0.1.6-0.20210802203754-9b21a8868e16 h1:ZC/gVBZl8poJyKzWLxxlsmhayVGosF4mohR35szD5Bg=
    golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
    honnef.co/go/tools@v0.2.0 h1:ws8AfbgTX3oIczLPNPCu5166oBg9ST2vNs0rcht+mDE=
    mvdan.cc/gofumpt@v0.1.1 h1:bi/1aS/5W00E2ny5q65w9SnKpWEF/UIOqDYBILpo9rA=
    mvdan.cc/xurls/v2@v2.2.0 h1:NSZPykBXJFCetGZykLAxaL6SIpvbVy/UFEniIfHAa8A=
```
</details>

* Run `code -v` or `code-insiders -v` to get version of VS Code or VS Code Insiders.
	- `zsh: command not found: code`
* Check your installed extensions to get the version of the VS Code Go extension
	- `v0.27.1`
* Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > `Go: Locate Configured Go Tools` command.
<details>
<summary>Output:</summary>

```
Checking configured tools....
GOBIN: undefined
toolsGopath: 
gopath: /Users/my.user/go
GOROOT: /usr/local/go
PATH: /Users/my.user/.pyenv/shims:/Users/my.user/.pyenv/bin:/Users/my.user/.nvm/versions/node/v15.10.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/go/bin:/Library/Apple/usr/bin:/Users/my.user/go/bin

	go:	/usr/local/go/bin/go: go version go1.16.3 darwin/amd64

	gopkgs:	/Users/my.user/go/bin/gopkgs: go1.16.3
		path	github.com/uudashr/gopkgs/v2/cmd/gopkgs
		mod	github.com/uudashr/gopkgs/v2	v2.1.2	h1:A0+QH6wqNRHORJnxmqfeuBEsK4nYQ7pgcOHhqpqcrpo=
		dep	github.com/karrick/godirwalk	v1.12.0	h1:nkS4xxsjiZMvVlazd0mFyiwD4BR9f3m6LXGhM2TUx3Y=
		dep	github.com/pkg/errors	v0.8.1	h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
	
	go-outline:	/Users/my.user/go/bin/go-outline: go1.16.3
		path	github.com/ramya-rao-a/go-outline
		mod	github.com/ramya-rao-a/go-outline	v0.0.0-20210608161538-9736a4bde949	h1:iaD+iVf9xGfajsJp+zYrg9Lrk6gMJ6/hZHO4cYq5D5o=
		dep	golang.org/x/tools	v0.1.1	h1:wGiQel/hW0NnEkJUk8lbzkX2gFJU6PFxf1v5OlCfuOs=
	
	gotests:	/Users/my.user/go/bin/gotests: go1.16.3
		path	github.com/cweill/gotests/gotests
		mod	github.com/cweill/gotests	v1.6.0	h1:KJx+/p4EweijYzqPb4Y/8umDCip1Cv6hEVyOx0mE9W8=
		dep	golang.org/x/tools	v0.0.0-20191109212701-97ad0ed33101	h1:LCmXVkvpQCDj724eX6irUTPCJP5GelFHxqGSWL2D1R0=
	
	gomodifytags:	/Users/my.user/go/bin/gomodifytags: go1.16.3
		path	github.com/fatih/gomodifytags
		mod	github.com/fatih/gomodifytags	v1.13.0	h1:fmhwoecjZ5c34Q2chjRB9cL8Rgag+1TOSMy+grissMc=
		dep	github.com/fatih/camelcase	v1.0.0	h1:hxNvNX/xYBp0ovncs8WyWZrOrpBNub/JfaMvbURyft8=
		dep	github.com/fatih/structtag	v1.2.0	h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
		dep	golang.org/x/tools	v0.0.0-20180824175216-6c1c5e93cdc1	h1:EAPsk8kfGCjxQagrkWjzXlUWe2p3gj5MknO+z2o9GKc=
	
	impl:	/Users/my.user/go/bin/impl: go1.16.3
		path	github.com/josharian/impl
		mod	github.com/josharian/impl	v1.1.0	h1:gafhg1OFVMq46ifdkBa8wp4hlGogjktjjA5h/2j4+2k=
		dep	golang.org/x/mod	v0.2.0	h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
		dep	golang.org/x/tools	v0.0.0-20200522201501-cb1345f3a375	h1:SjQ2+AKWgZLc1xej6WSzL+Dfs5Uyd5xcZH1mGC411IA=
		dep	golang.org/x/xerrors	v0.0.0-20191204190536-9bdfabe68543	h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
	
	goplay:	/Users/my.user/go/bin/goplay: go1.16.3
		path	github.com/haya14busa/goplay/cmd/goplay
		mod	github.com/haya14busa/goplay	v1.0.0	h1:ED4BMrGQ3WH7H3YXrcnWMVzj1xeSepaYTkLh1DtFi/4=
		dep	github.com/skratchdot/open-golang	v0.0.0-20200116055534-eef842397966	h1:JIAuq3EEf9cgbU6AtGPK4CTG3Zf6CKMNqf0MHTggAUA=
	
	dlv:	/Users/my.user/go/bin/dlv: go1.16.3
		path	github.com/go-delve/delve/cmd/dlv
		mod	github.com/go-delve/delve	v1.7.0	h1:MaWAD3LtvjE/LL98urSHPjaMT+OubpQ2sqF3R2Uj1rc=
		dep	github.com/cosiner/argv	v0.1.0	h1:BVDiEL32lwHukgJKP87btEPenzrrHUjajs/8yzaqcXg=
		dep	github.com/cpuguy83/go-md2man	v1.0.10	h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
		dep	github.com/google/go-dap	v0.5.0	h1:RMHAVn5xeunBakYk65ggHXttk6qjZVdbmi+xhAoL2wY=
		dep	github.com/hashicorp/golang-lru	v0.5.4	h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
		dep	github.com/mattn/go-isatty	v0.0.3	h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
		dep	github.com/peterh/liner	v0.0.0-20170317030525-88609521dc4b	h1:8uaXtUkxiy+T/zdLWuxa/PG4so0TPZDZfafFNNSaptE=
		dep	github.com/russross/blackfriday	v1.5.2	h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
		dep	github.com/sirupsen/logrus	v1.6.0	h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
		dep	github.com/spf13/cobra	v0.0.0-20170417170307-b6cb39589372	h1:eRfW1vRS4th8IX2iQeyqQ8cOUNOySvAYJ0IUvTXGoYA=
		dep	github.com/spf13/pflag	v0.0.0-20170417173400-9e4c21054fa1	h1:7bozMfSdo41n2NOc0GsVTTVUiA+Ncaj6pXNpm4UHKys=
		dep	go.starlark.net	v0.0.0-20200821142938-949cc6f4b097	h1:YiRMXXgG+Pg26t1fjq+iAjaauKWMC9cmGFrtOEuwDDg=
		dep	golang.org/x/arch	v0.0.0-20190927153633-4e8777c89be4	h1:QlVATYS7JBoZMVaf+cNjb90WD/beKVHnIxFKT4QaHVI=
		dep	golang.org/x/sys	v0.0.0-20200625212154-ddb9806d33ae	h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo=
		dep	gopkg.in/yaml.v2	v2.2.1	h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
	
	dlv-dap:	/Users/my.user/go/bin/dlv-dap: go1.16.3
		path	github.com/go-delve/delve/cmd/dlv
		mod	github.com/go-delve/delve	v1.7.1-0.20210804080032-f95340ae1bf9	h1:MNF+leMBsgJoT80cCoVJOsZWIJQlAOdTHgn0VslfJ6k=
		dep	github.com/cosiner/argv	v0.1.0	h1:BVDiEL32lwHukgJKP87btEPenzrrHUjajs/8yzaqcXg=
		dep	github.com/cpuguy83/go-md2man/v2	v2.0.0	h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
		dep	github.com/google/go-dap	v0.5.0	h1:RMHAVn5xeunBakYk65ggHXttk6qjZVdbmi+xhAoL2wY=
		dep	github.com/hashicorp/golang-lru	v0.5.4	h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
		dep	github.com/mattn/go-isatty	v0.0.3	h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
		dep	github.com/peterh/liner	v0.0.0-20170317030525-88609521dc4b	h1:8uaXtUkxiy+T/zdLWuxa/PG4so0TPZDZfafFNNSaptE=
		dep	github.com/russross/blackfriday/v2	v2.0.1	h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
		dep	github.com/shurcooL/sanitized_anchor_name	v1.0.0	h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
		dep	github.com/sirupsen/logrus	v1.6.0	h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
		dep	github.com/spf13/cobra	v1.1.3	h1:xghbfqPkxzxP3C/f3n5DdpAbdKLj4ZE4BWQI362l53M=
		dep	github.com/spf13/pflag	v1.0.5	h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
		dep	go.starlark.net	v0.0.0-20200821142938-949cc6f4b097	h1:YiRMXXgG+Pg26t1fjq+iAjaauKWMC9cmGFrtOEuwDDg=
		dep	golang.org/x/arch	v0.0.0-20190927153633-4e8777c89be4	h1:QlVATYS7JBoZMVaf+cNjb90WD/beKVHnIxFKT4QaHVI=
		dep	golang.org/x/sys	v0.0.0-20210514084401-e8d321eab015	h1:hZR0X1kPW+nwyJ9xRxqZk1vx5RUObAPBdKVvXPDUH/E=
		dep	gopkg.in/yaml.v2	v2.4.0	h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
	
	golint:	/Users/my.user/go/bin/golint: go1.16.3
		path	golang.org/x/lint/golint
		mod	golang.org/x/lint	v0.0.0-20210508222113-6edffad5e616	h1:VLliZ0d+/avPrXXH+OakdXhpJuEoBZuwh1m2j7U6Iug=
		dep	golang.org/x/tools	v0.0.0-20200130002326-2f3ba24bd6e7	h1:EBZoQjiKKPaLbPrbpssUfuHtwM6KV/vb4U85g/cigFY=
	
	gopls:	/Users/my.user/go/bin/gopls: go1.16.3
		path	golang.org/x/tools/gopls
		mod	golang.org/x/tools/gopls	v0.7.1	h1:Mh3Z8Xcoq3Zy7ksSlwDV/nzQSbjFf06A+L+F8YHq55U=
		dep	github.com/BurntSushi/toml	v0.3.1	h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
		dep	github.com/google/go-cmp	v0.5.5	h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
		dep	github.com/sergi/go-diff	v1.1.0	h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
		dep	golang.org/x/mod	v0.4.2	h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
		dep	golang.org/x/sync	v0.0.0-20210220032951-036812b2e83c	h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
		dep	golang.org/x/sys	v0.0.0-20210510120138-977fb7262007	h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
		dep	golang.org/x/tools	v0.1.6-0.20210802203754-9b21a8868e16	h1:ZC/gVBZl8poJyKzWLxxlsmhayVGosF4mohR35szD5Bg=
		dep	golang.org/x/xerrors	v0.0.0-20200804184101-5ec99f83aff1	h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
		dep	honnef.co/go/tools	v0.2.0	h1:ws8AfbgTX3oIczLPNPCu5166oBg9ST2vNs0rcht+mDE=
		dep	mvdan.cc/gofumpt	v0.1.1	h1:bi/1aS/5W00E2ny5q65w9SnKpWEF/UIOqDYBILpo9rA=
		dep	mvdan.cc/xurls/v2	v2.2.0	h1:NSZPykBXJFCetGZykLAxaL6SIpvbVy/UFEniIfHAa8A=
	

go env
Workspace Folder (smartequip-common-go): /Users/my.user/git/smartequip-common-go
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/smartequip-common-go/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build1385492950=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (smartequip-certifier): /Users/my.user/git/smartequip-certifier
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/smartequip-certifier/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build2457837107=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (tests): /Users/my.user/git/smartequip-certifier/tests
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/smartequip-certifier/tests/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build3326164392=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (dbquery): /Users/my.user/git/smartequip-lambdas/dbquery
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/smartequip-lambdas/dbquery/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build2736917249=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (sdk-go): /Users/my.user/git/sdk-go
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/sdk-go/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build2709731396=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (nicehttp): /Users/my.user/git/nicehttp
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/nicehttp/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build664731063=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (cfa-react-starter): /Users/my.user/git/cfa-react-starter
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/dev/null"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build2756984840=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (okta-samples-js-react): /Users/my.user/git/okta-samples-js-react
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/dev/null"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build2600761484=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (update-cdn): /Users/my.user/git/update-cdn
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/update-cdn/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build904331187=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
Workspace Folder (ots-go-framework-core): /Users/my.user/git/ots-go-framework-core
	GO111MODULE=""
	GOARCH="amd64"
	GOBIN=""
	GOCACHE="/Users/my.user/Library/Caches/go-build"
	GOENV="/Users/my.user/Library/Application Support/go/env"
	GOEXE=""
	GOFLAGS=""
	GOHOSTARCH="amd64"
	GOHOSTOS="darwin"
	GOINSECURE=""
	GOMODCACHE="/Users/my.user/go/pkg/mod"
	GONOPROXY="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GONOSUMDB="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOOS="darwin"
	GOPATH="/Users/my.user/go"
	GOPRIVATE="github.com/cfacorp,git.cloud.riot.cfahome.com/riot-developers"
	GOPROXY="https://proxy.golang.org,direct"
	GOROOT="/usr/local/go"
	GOSUMDB="sum.golang.org"
	GOTMPDIR=""
	GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
	GOVCS=""
	GOVERSION="go1.16.3"
	GCCGO="gccgo"
	AR="ar"
	CC="clang"
	CXX="clang++"
	CGO_ENABLED="1"
	GOMOD="/Users/my.user/git/ots-go-framework-core/go.mod"
	CGO_CFLAGS="-g -O2"
	CGO_CPPFLAGS=""
	CGO_CXXFLAGS="-g -O2"
	CGO_FFLAGS="-g -O2"
	CGO_LDFLAGS="-g -O2"
	PKG_CONFIG="pkg-config"
	GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/x7/jzrn96rn02765bbr_chytlh80000gn/T/go-build614227715=/tmp/go-build -gno-record-gcc-switches -fno-common"
	
```
</details

### Share the Go related settings you have added/edited

Run `Preferences: Open Settings (JSON)` command to open your settings.json file.
Share all the settings with the `go.` or `["go"]` or `gopls` prefixes.
 - Here are my Go and git settings:
```
{
    "go.formatTool": "goimports",
    "go.enableCodeLens": {

        "references": false,
        "runtest": false
    },
    "go.toolsManagement.autoUpdate": true,
    "go.lintTool": "golint",
    "git.enabled": false,
}
```

### Describe the bug
After I changed the casing of the file, VSCode Go has gotten into a bad state and thinks there is a duplicate file. However, the project compiles fine, and only 1 file exists in the filesystem and in git. See the screenshot: if you look at the top, I'm hovering the package name to show the error. I've tried the following steps to fix this:
 - Restart VSCode
 - Update all vscode Go tools to the latest version
 - Delete the offending file + folder, commit to git, then manually copy them back into the project, then commit again.
 - Cleared VSCode's file cache via `Clear Editor History`
 - Disable git in VSCode

### Steps to reproduce the behavior:
1. Rename the file `emailTemplates.go` to `emailtemplates.go`
2. Rename the folder `emailTemplates` to `emailtemplates`
3. See error

### Screenshots or recordings
![Screen Shot 2021-08-13 at 5 19 40 PM](https://user-images.githubusercontent.com/10030156/129589662-c2ee75f9-3013-4a4c-a3ed-50a9361dd792.png)