Multiple test failures with Go 1.16 beta 1

[eclipseo]

On Fedora Rawhide with Go 1.16 beta 1, the following tests fails:

Testing    in: /builddir/build/BUILD/validate-0.20.0/_build/src
         PATH: /builddir/build/BUILD/validate-0.20.0/_build/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin
       GOPATH: /builddir/build/BUILD/validate-0.20.0/_build:/usr/share/gocode
  GO111MODULE: off
      command: go test -buildmode pie -compiler gc -ldflags " -X github.com/go-openapi/validate/version=0.20.0 -extldflags '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld  '"
      testing: github.com/go-openapi/validate
github.com/go-openapi/validate
--- FAIL: TestStringItemsValidation (0.00s)
    items_validator_test.go:180: 
        	Error Trace:	items_validator_test.go:180
        	Error:      	Error message not equal:
        	            	expected: "tags.1 in query must be of type string: \"null\""
        	            	actual  : "tags.1 in query should be at least 3 chars long"
        	Test:       	TestStringItemsValidation
--- FAIL: TestStringParameterValidation (0.00s)
    parameter_validator_test.go:152: 
        	Error Trace:	parameter_validator_test.go:152
        	Error:      	Error message not equal:
        	            	expected: "name in query must be of type string: \"null\""
        	            	actual  : "name in query is required"
        	Test:       	TestStringParameterValidation
--- FAIL: Test_Issue1621 (1.34s)
    messages_test.go:435: 
        	Error Trace:	messages_test.go:435
        	            				spec_test.go:660
        	Error:      	"[/v4/clusters/{cluster_id}/.examples.kubernetes_version in body must be of type string: "null"]" should have 0 item(s), but has 1
        	Test:       	Test_Issue1621
    messages_test.go:436: Returned warnings:
    messages_test.go:438: /v4/clusters/{cluster_id}/.examples.kubernetes_version in body must be of type string: "null"
FAIL
exit status 1
FAIL	github.com/go-openapi/validate	18.998s 

[eclipseo]

It's because I use a newer github.com/go-openapi/errors
Closing.

[eclipseo]

Actually I use the correct one, version 0.19.9

[fredbi]

@eclipseo a recent commit was supposed to address go1.16 specifics, in particular affecting the required check: #138

Can you reproduce your issue with v0.20.0? (just before that commit)

[eclipseo]

I was using 0.20.0, it seems to be fixed with 0.20.1 indeed.

Thank you.