panic: runtime error: invalid memory address or nil pointer dereference [recovered]
        panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x598dcf]

goroutine 14 [running]:
go/types.(*Checker).handleBailout(0xc0003d0e00, 0xc00125bbd0)
        /snap/go/10585/src/go/types/check.go:367 +0x88
panic({0x716b20?, 0x99ea20?})
        /snap/go/10585/src/runtime/panic.go:770 +0x132
go/types.(*StdSizes).Sizeof(0x0, {0x7e4ed8, 0x9a26e0})
        /snap/go/10585/src/go/types/sizes.go:228 +0x30f
go/types.(*Config).sizeof(...)
        /snap/go/10585/src/go/types/sizes.go:333
go/types.representableConst.func1({0x7e4ed8?, 0x9a26e0?})
        /snap/go/10585/src/go/types/const.go:76 +0x9e
go/types.representableConst({0x7e6210, 0x9973a0}, 0xc0003d0e00, 0x9a26e0, 0xc001259e50)
        /snap/go/10585/src/go/types/const.go:92 +0x192
go/types.(*Checker).representation(0xc0003d0e00, 0xc000c22fc0, 0x9a26e0)
        /snap/go/10585/src/go/types/const.go:256 +0x65
go/types.(*Checker).implicitTypeAndValue(0xc0003d0e00, 0xc000c22fc0, {0x7e4ed8, 0x9a26e0})
        /snap/go/10585/src/go/types/expr.go:375 +0x2d7
go/types.(*Checker).assignment(0xc0003d0e00, 0xc000c22fc0, {0x7e4ed8, 0x9a26e0}, {0x76b4b5, 0xb})
        /snap/go/10585/src/go/types/assignments.go:52 +0x2e5
go/types.(*Checker).exprInternal(0xc0003d0e00, 0x0, 0xc000c22fc0, {0x7e5680, 0xc0009b7f40}, {0x0, 0x0})
        /snap/go/10585/src/go/types/expr.go:1268 +0x2b6c
go/types.(*Checker).rawExpr(0xc0003d0e00, 0x0, 0xc000c22fc0, {0x7e5680?, 0xc0009b7f40?}, {0x0?, 0x0?}, 0x0)
        /snap/go/10585/src/go/types/expr.go:979 +0x19e
go/types.(*Checker).expr(0xc0003d0e00, 0xc000b524c0?, 0xc000c22fc0, {0x7e5680?, 0xc0009b7f40?})
        /snap/go/10585/src/go/types/expr.go:1513 +0x30
go/types.(*Checker).initVars(0xc0003d0e00, {0xc000eb6948, 0x1, 0xc0009b3c50?}, {0xc000f0be50, 0x1?, 0xc000f0bdc0?}, {0x7e5aa0, 0xc0009c1080})
        /snap/go/10585/src/go/types/assignments.go:381 +0x60b
go/types.(*Checker).stmt(0xc0003d0e00, 0x0, {0x7e5aa0, 0xc0009c1080})
        /snap/go/10585/src/go/types/stmt.go:524 +0x1fc5
go/types.(*Checker).stmtList(0xc0003d0e00, 0x0, {0xc000f0be60?, 0x0?, 0xc000e27948?})
        /snap/go/10585/src/go/types/stmt.go:121 +0x85
go/types.(*Checker).funcBody(0xc0003d0e00, 0x7e5090?, {0xc0003dae28?, 0xc000b524c0?}, 0xc00112ee80, 0xc0009b3f50, {0x0?, 0x0?})
        /snap/go/10585/src/go/types/stmt.go:41 +0x331
go/types.(*Checker).funcDecl.func1()
        /snap/go/10585/src/go/types/decl.go:852 +0x3a
go/types.(*Checker).processDelayed(0xc0003d0e00, 0x0)
        /snap/go/10585/src/go/types/check.go:467 +0x162
go/types.(*Checker).checkFiles(0xc0003d0e00, {0xc00014c848, 0x55, 0x55})
        /snap/go/10585/src/go/types/check.go:411 +0x1cc
go/types.(*Checker).Files(...)
        /snap/go/10585/src/go/types/check.go:372
golang.org/x/tools/go/packages.(*loader).loadPackage(0xc00015a0e0, 0xc0004cb0b0)
        /home/igor/go/pkg/mod/golang.org/x/tools@v0.7.0/go/packages/packages.go:1052 +0xa72
golang.org/x/tools/go/packages.(*loader).loadRecursive.func1()
        /home/igor/go/pkg/mod/golang.org/x/tools@v0.7.0/go/packages/packages.go:851 +0x1a9
sync.(*Once).doSlow(0x0?, 0x0?)
        /snap/go/10585/src/sync/once.go:74 +0xc2
sync.(*Once).Do(...)
        /snap/go/10585/src/sync/once.go:65
golang.org/x/tools/go/packages.(*loader).loadRecursive(0x0?, 0x0?)
        /home/igor/go/pkg/mod/golang.org/x/tools@v0.7.0/go/packages/packages.go:839 +0x4a
golang.org/x/tools/go/packages.(*loader).loadRecursive.func1.1(0x0?)
        /home/igor/go/pkg/mod/golang.org/x/tools@v0.7.0/go/packages/packages.go:846 +0x26
created by golang.org/x/tools/go/packages.(*loader).loadRecursive.func1 in goroutine 12
        /home/igor/go/pkg/mod/golang.org/x/tools@v0.7.0/go/packages/packages.go:845 +0x94