possible fix

dist/setup/index.js

@@ -63403,7 +63403,10 @@ function findMatch(versionSpec, arch = os_1.default.arch()) {
         }
         if (versionSpec === utils_1.StableReleaseAlias.Stable ||
             versionSpec === utils_1.StableReleaseAlias.OldStable) {
-            versionSpec = yield resolveStableVersionInput(versionSpec, undefined, arch, candidates);
+            const fixedCandidates = candidates.map(item => {
+                return Object.assign(Object.assign({}, item), { version: makeSemver(item.version) });
+            });
+            versionSpec = yield resolveStableVersionInput(versionSpec, undefined, arch, fixedCandidates);
         }
         let goFile;
         for (let i = 0; i < candidates.length; i++) {

src/installer.ts

@@ -272,11 +272,14 @@ export async function findMatch(
     versionSpec === StableReleaseAlias.Stable ||
     versionSpec === StableReleaseAlias.OldStable
   ) {
+    const fixedCandidates = candidates.map(item => {
+      return {...item, version: makeSemver(item.version)};
+    });
     versionSpec = await resolveStableVersionInput(
       versionSpec,
       undefined,
       arch,
-      candidates as (tc.IToolRelease & IGoVersion)[]
+      fixedCandidates as (tc.IToolRelease & IGoVersion)[]
     );
   }