go/types: failed genericType assertion in Checker.instantiatedType #71198
Description
#!stacks
"runtime.typeAssert" && "go/types.(*Checker).instantiatedType:+38"
Issue created by stacks.
func (check *Checker) instantiatedType(ix *indexedExpr, def *TypeName) (res Type) {
...
// create instance
// The instance is not generic anymore as it has type arguments, but it still
// satisfies the genericType interface because it has type parameters, too.
inst := check.instance(ix.Pos(), gtyp, targs, nil, check.context()).(genericType)This stack aEVlDg was reported by telemetry:
crash/crashruntime.gopanic:+69go/types.(*Checker).handleBailout:+7go/types.(*Checker).Files.deferwrap1:+0runtime.gopanic:+50runtime.getitab:+58runtime.typeAssert:+7go/types.(*Checker).instantiatedType:+38go/types.(*Checker).typInternal:+61go/types.(*Checker).definedType:+1go/types.(*Checker).varType:+1go/types.(*Checker).varDecl:+5go/types.(*Checker).declStmt.func1:+56go/types.(*Checker).walkDecl:+27go/types.(*Checker).declStmt:+3go/types.(*Checker).stmt:+23go/types.(*Checker).stmtList:+9
golang.org/x/tools/gopls@v0.17.1 go1.24rc1 linux/amd64 vscode (10)
cc: @griesemer @findleyr
Dups: HNc-0g sRb2ZQ caAKMA ubM70w f0cr5w -B6Zow aGFSSA OhNcBw sk-sbA Fv9t1w
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