fix: propagate original error of unknown type

core/src/plugins/exec/common.ts

@@ -16,7 +16,7 @@ import { exec } from "../../util/util.js"
 import type { Log } from "../../logger/log-entry.js"
 import type { PluginContext } from "../../plugin-context.js"
 import type { ResolvedExecAction } from "./config.js"
-import { RuntimeError } from "../../exceptions.js"
+import { RuntimeError, toGardenError } from "../../exceptions.js"
 
 export function getDefaultEnvVars(action: ResolvedExecAction) {
   return {
@@ -115,6 +115,8 @@ export async function copyArtifacts(
         if (err.name === "CpyError") {
           throw new RuntimeError({ message: err.message })
         }
+
+        throw err
       }
     })
   )