x/tools/go/loader: broken tests

[bradfitz]

@griesemer, one for you. (or @alandonovan can steal) Part of #11811 (subrepos needing to be green), the x/tools/go/loader tests are failing at tip, on multiple GOOS/GOARCH. This is darwin-amd64:

cannot find package "nosuchpkg" in any of:
    /var/folders/8z/xcmymdqs1g35gw7z_k5fq4pr0000gp/T/workdir/go/src/nosuchpkg (from $GOROOT)
    /var/folders/8z/xcmymdqs1g35gw7z_k5fq4pr0000gp/T/workdir/gopath/src/nosuchpkg (from $GOPATH)
cannot find package "nosuchpkg" in any of:
    /var/folders/8z/xcmymdqs1g35gw7z_k5fq4pr0000gp/T/workdir/go/src/nosuchpkg (from $GOROOT)
    /var/folders/8z/xcmymdqs1g35gw7z_k5fq4pr0000gp/T/workdir/gopath/src/nosuchpkg (from $GOPATH)
open missing.go: no such file or directory
open missing.go: no such file or directory
testdata/badpkgdecl.go:1:34: expected 'package', found 'EOF'
testdata/badpkgdecl.go:1:34: expected 'package', found 'EOF'
/go/src/b/x.go:1:21: could not import c (cannot find package "c" in any of:
    /go/src/c (from $GOROOT)
    ($GOPATH not set))
/go/src/b/x.go:1:21: could not import c (cannot find package "c" in any of:
    /go/src/c (from $GOROOT)
    ($GOPATH not set))
/go/src/b/x.go:1:21: could not import c (/go/src/c/x.go:1:8: expected 'IDENT', found 'EOF')
/go/src/c/x.go:1:20: expected operand, found 'EOF'
cannot find package "two/three" in any of:
    /go/src/two/three (from $GOROOT)
    ($GOPATH not set)
/go/src/c/x.go:1:31: cannot convert false (untyped bool constant) to int
--- FAIL: ExampleConfig_CreateFromFiles (1.19s)
got:
created: [hello]
imported: []
initial: [hello]
all: [errors fmt hello io math os reflect runtime strconv sync sync/atomic syscall time unicode/utf8]
strconv.Files: [atob.go atof.go atoi.go decimal.go doc.go extfloat.go ftoa.go isprint.go itoa.go quote.go]
want:
created: [hello]
imported: []
initial: [hello]
all: [errors fmt hello io math os reflect runtime strconv sync sync/atomic syscall time unicode/utf8]
strconv.Files: [atob.go atof.go atoi.go decimal.go extfloat.go ftoa.go isprint.go itoa.go quote.go]
--- FAIL: ExampleConfig_Import (1.17s)
got:
created: [strconv_test]
imported: [errors strconv unicode/utf8]
initial: [errors strconv strconv_test unicode/utf8]
all: [bufio bytes errors flag fmt io log math math/rand os reflect runtime runtime/pprof runtime/trace sort strconv strconv_test strings sync sync/atomic syscall testing text/tabwriter time unicode unicode/utf8]
strconv.Files: [atob.go atof.go atoi.go decimal.go doc.go extfloat.go ftoa.go isprint.go itoa.go quote.go internal_test.go]
strconv_test.Files: [atob_test.go atof_test.go atoi_test.go decimal_test.go example_test.go fp_test.go ftoa_test.go itoa_test.go quote_test.go strconv_test.go]
want:
created: [strconv_test]
imported: [errors strconv unicode/utf8]
initial: [errors strconv strconv_test unicode/utf8]
all: [bufio bytes errors flag fmt io math math/rand os reflect runtime runtime/pprof sort strconv strconv_test strings sync sync/atomic syscall testing text/tabwriter time unicode unicode/utf8]
strconv.Files: [atob.go atof.go atoi.go decimal.go extfloat.go ftoa.go isprint.go itoa.go quote.go internal_test.go]
strconv_test.Files: [atob_test.go atof_test.go atoi_test.go decimal_test.go fp_test.go ftoa_test.go itoa_test.go quote_example_test.go quote_test.go strconv_test.go]
FAIL
FAIL    golang.org/x/tools/go/loader    20.529s

[mwhudson]

I filed this already! #11902

[alexbrainman]

https://go-review.googlesource.com/#/c/12832/

No?