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| author | Dan Scales <danscales@google.com> | 2021-09-24 08:57:06 -0700 |
|---|---|---|
| committer | Dan Scales <danscales@google.com> | 2021-09-25 01:24:46 +0000 |
| commit | 8854368cb076ea9a2b71c8b3c8f675a8e19b751c (patch) | |
| tree | 2bc1f770b01ce1da5ab899ef61be769aac416d70 /src/cmd/compile/internal/noder | |
| parent | d60ad1e068263832c711aaf17b6ccb1b7f71b000 (diff) | |
| download | go-8854368cb076ea9a2b71c8b3c8f675a8e19b751c.tar.xz | |
cmd/compile: deal with blank nodes with typeparam type during stenciling
Deal correctly with a blank local variable with type param type. This is
a special case, because a blank local variable is not in the fn.Dcl
list. In this case, we must explicitly create a new blank node with the
correct substituted type, so we have correct types if the blank local
variable has an initializing assignment.
Fixes #48602
Change-Id: I903ea44b29934e180404e32800773b7309bf297b
Reviewed-on: https://go-review.googlesource.com/c/go/+/352117
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>
Diffstat (limited to 'src/cmd/compile/internal/noder')
| -rw-r--r-- | src/cmd/compile/internal/noder/stencil.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/noder/stencil.go b/src/cmd/compile/internal/noder/stencil.go index cf8641d60e..23f53bac04 100644 --- a/src/cmd/compile/internal/noder/stencil.go +++ b/src/cmd/compile/internal/noder/stencil.go @@ -912,6 +912,12 @@ func (subst *subster) node(n ir.Node) ir.Node { if v := subst.ts.Vars[x.(*ir.Name)]; v != nil { return v } + if ir.IsBlank(x) { + // Special case, because a blank local variable is + // not in the fn.Dcl list. + m := ir.NewNameAt(x.Pos(), ir.BlankNode.Sym()) + return typed(subst.ts.Typ(x.Type()), m) + } return x case ir.ONONAME: // This handles the identifier in a type switch guard |