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compiler: support Go 1.27 generic methods via x/tools upgrade

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Go 1.27 adds generic methods (golang/go#77273). golang.org/x/tools
go/ssa v0.42.0 does not instantiate them: objectMethod only applies
receiverTypeArgs and ignores method-level type parameters, so a call
such as (*math/rand/v2.Rand).N resolves to the abstract generic method
and its body reaches createConst with a type-parameter-typed zero
constant, triggering "panic: expected nil interface constant".

Upgrade golang.org/x/tools to v0.47.0, whose go/ssa returns nil from
MethodValue for generic methods and instantiates method-level type
parameters. No compiler changes are required.

Since x/tools v0.47.0 requires Go 1.25, raise the minimum supported Go
version from 1.24 to 1.25.

Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2026-07-01 10:18:40 +02:00
committed by Ron Evans
parent 919c998355
commit bd1d11d166
4 changed files with 20 additions and 20 deletions
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builder/config.go
+1 -1
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@@ -25,7 +25,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
}
// Version range supported by TinyGo.
const minorMin = 24 // when updating the min version, also update .github/workflows/compat.yml
const minorMin = 25 // when updating the min version, also update .github/workflows/compat.yml
const minorMax = 27
// Check that we support this Go toolchain version.