Process completed with exit code 1.

Process completed with exit code 1.

Process completed with exit code 2.

--- stderr --- (node:48492) ExperimentalWarning: Importing WebAssembly module instances is an experimental feature and might change at any time (Use `node --trace-warnings ...` to show where the warning was created) (node:48492) ExperimentalWarning: vm.USE_MAIN_CONTEXT_DEFAULT_LOADER is an experimental feature and might change at any time (Use `node --trace-warnings ...` to show where the warning was created) (node:48492) ExperimentalWarning: Importing WebAssembly module instances is an experimental feature and might change at any time /Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/common/wpt.js:844 throw new Error( ^ Error: Found 1 unexpected failures. Consider updating test/wpt/status/wasm/jsapi.json for these files: exception/constructor.tentative.any.js at process.<anonymous> (/Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/common/wpt.js:844:15) at process.emit (node:events:509:20) Node.js v27.0.0-pre --- stdout --- [SKIPPED] esm-integration/global-exports-live-bindings.tentative.any.js: Live bindings unsupported pending V8 WebAssemblyModuleRecord [SKIPPED] esm-integration/namespace-instance.tentative.any.js: pending https://github.com/nodejs/node/pull/59024 [SKIPPED] esm-integration/v128-tdz.tentative.any.js: v128 undefined Wasm bindings not yet supported in V8 [SKIPPED] exception/getArg.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/call.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/constructor.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/table.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] global/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] idlharness.any.js: track - still tentative / unsupported [SKIPPED] memory/constructor-types.tentative.any.js: track - still tentative / unsupported [SKIPPED] memory/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] table/constructor-types.tentative.any.js: track - still tentative / unsupported [SKIPPED] table/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] tag/type.tentative.any.js: track - still tentative / unsupported [PASS] WebAssembly.instantiate(module): Non-object imports argument: null [PASS] WebAssembly.instantiate(module): Non-object imports argument: true [PASS] WebAssembly.instantiate(module): Non-object imports argument: "" [PASS] WebAssembly.instantiate(module): Non-object imports argument: symbol "Symbol()" [PASS] WebAssembly.instantiate(module): Non-object imports argument: 1 [PASS] WebAssembly.instantiate(module): Non-object imports argument: 0.1 [PASS] WebAssembly.instantiate(module): Non-object imports argument: NaN [PASS] WebAssembly.instantiate(module): Non-object module: undefined [PASS] WebAssembly.instantiate(module): Non-object module: null [PASS] WebAssembly.instantiate(module): Non-object module: true [PASS] WebAssembly.instantiate(module): Non-object module: "" [PASS] WebAssembly.instantiate(module): Non-object module: symbol "Symbol()" [PASS] WebAssembly.instantiate(module): Non-object module: 1 [PASS] WebAssembly.instantiate(module): Non-object module: 0.1 [PASS] WebAssembly.instantiate(module): Non-object module: NaN [PASS] WebAssembly.instantiate(module): Missing imports argument [PASS] WebAssembly.instantiate(module): Imports argument with missing property: undefined [PASS] WebAssembly.instantiate(module): Imports argument with missing property: empty object [PASS] WebAssembly.instantiate(module): Imports argument with missing property: wrong property [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: undefined [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: null [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: true [PASS] WebAssembly.instantiate(module): Importing a function with a

--- stderr --- node:internal/assert/utils:146 throw error; ^ AssertionError [ERR_ASSERTION]: New serialization format. This test is expected to fail when V8 changes its serialization format. When that happens, the "desStr" variable must be updated to the new value and the change should be mentioned in the release notes, as it is semver-major. Consider opening an issue as a heads up at https://github.com/nodejs/node/issues/new + actual - expected + 'ff106f2203666f6f5e007b01' - 'ff0f6f2203666f6f5e007b01' ^ at Object.<anonymous> (/Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/parallel/test-v8-serdes.js:200:10) at Module._compile (node:internal/modules/cjs/loader:1873:14) at Module._extensions..js (node:internal/modules/cjs/loader:2013:10) at Module.load (node:internal/modules/cjs/loader:1596:32) at Module._load (node:internal/modules/cjs/loader:1398:12) at wrapModuleLoad (node:internal/modules/cjs/loader:255:19) at Module.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:154:5) at node:internal/main/run_main_module:33:47 { generatedMessage: false, code: 'ERR_ASSERTION', actual: 'ff106f2203666f6f5e007b01', expected: 'ff0f6f2203666f6f5e007b01', operator: 'deepStrictEqual', diff: 'simple' } Node.js v27.0.0-pre Command: out/Release/node --expose-internals /Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/parallel/test-v8-serdes.js

Process completed with exit code 2.

--- stderr --- (node:54751) ExperimentalWarning: Importing WebAssembly module instances is an experimental feature and might change at any time (Use `node --trace-warnings ...` to show where the warning was created) /Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/common/wpt.js:844 throw new Error( ^ Error: Found 1 unexpected failures. Consider updating test/wpt/status/wasm/jsapi.json for these files: exception/constructor.tentative.any.js at process.<anonymous> (/Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/common/wpt.js:844:15) at process.emit (node:events:509:20) Node.js v27.0.0-pre --- stdout --- [SKIPPED] esm-integration/global-exports-live-bindings.tentative.any.js: Live bindings unsupported pending V8 WebAssemblyModuleRecord [SKIPPED] esm-integration/namespace-instance.tentative.any.js: pending https://github.com/nodejs/node/pull/59024 [SKIPPED] esm-integration/v128-tdz.tentative.any.js: v128 undefined Wasm bindings not yet supported in V8 [SKIPPED] exception/getArg.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/call.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/constructor.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/table.tentative.any.js: track - still tentative / unsupported [SKIPPED] function/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] global/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] idlharness.any.js: track - still tentative / unsupported [SKIPPED] memory/constructor-types.tentative.any.js: track - still tentative / unsupported [SKIPPED] memory/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] table/constructor-types.tentative.any.js: track - still tentative / unsupported [SKIPPED] table/type.tentative.any.js: track - still tentative / unsupported [SKIPPED] tag/type.tentative.any.js: track - still tentative / unsupported [PASS] Promise type [PASS] Missing argument [PASS] Invalid arguments [PASS] Branding [PASS] Empty buffer [PASS] Invalid code [PASS] Result type [PASS] Stray argument [PASS] Changing the buffer [PASS] WebAssembly.instantiate(module): Non-object imports argument: null [PASS] WebAssembly.instantiate(module): Non-object imports argument: true [PASS] WebAssembly.instantiate(module): Non-object imports argument: "" [PASS] WebAssembly.instantiate(module): Non-object imports argument: symbol "Symbol()" [PASS] WebAssembly.instantiate(module): Non-object imports argument: 1 [PASS] WebAssembly.instantiate(module): Non-object imports argument: 0.1 [PASS] WebAssembly.instantiate(module): Non-object imports argument: NaN [PASS] WebAssembly.instantiate(module): Non-object module: undefined [PASS] WebAssembly.instantiate(module): Non-object module: null [PASS] WebAssembly.instantiate(module): Non-object module: true [PASS] WebAssembly.instantiate(module): Non-object module: "" [PASS] WebAssembly.instantiate(module): Non-object module: symbol "Symbol()" [PASS] WebAssembly.instantiate(module): Non-object module: 1 [PASS] WebAssembly.instantiate(module): Non-object module: 0.1 [PASS] WebAssembly.instantiate(module): Non-object module: NaN [PASS] WebAssembly.instantiate(module): Missing imports argument [PASS] WebAssembly.instantiate(module): Imports argument with missing property: undefined [PASS] WebAssembly.instantiate(module): Imports argument with missing property: empty object [PASS] WebAssembly.instantiate(module): Imports argument with missing property: wrong property [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: undefined [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: null [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: true [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: "" [PASS] WebAssembly.instantiate(module): Importing a function with an incorrectly-typed value: symbol "S

--- stderr --- node:internal/process/promises:324 triggerUncaughtException(err, true /* fromPromise */); ^ AssertionError [ERR_ASSERTION]: w1stack = 44955, w2stack = 79027 are too far apart at /Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/parallel/test-worker-stack-overflow-stack-size.js:44:5 { generatedMessage: false, code: 'ERR_ASSERTION', actual: false, expected: true, operator: '==', diff: 'simple' } Node.js v27.0.0-pre Command: out/Release/node /Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/parallel/test-worker-stack-overflow-stack-size.js

--- stderr --- node:internal/assert/utils:146 throw error; ^ AssertionError [ERR_ASSERTION]: New serialization format. This test is expected to fail when V8 changes its serialization format. When that happens, the "desStr" variable must be updated to the new value and the change should be mentioned in the release notes, as it is semver-major. Consider opening an issue as a heads up at https://github.com/nodejs/node/issues/new + actual - expected + 'ff106f2203666f6f5e007b01' - 'ff0f6f2203666f6f5e007b01' ^ at Object.<anonymous> (/Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/parallel/test-v8-serdes.js:200:10) at Module._compile (node:internal/modules/cjs/loader:1873:14) at Module._extensions..js (node:internal/modules/cjs/loader:2013:10) at Module.load (node:internal/modules/cjs/loader:1596:32) at Module._load (node:internal/modules/cjs/loader:1398:12) at wrapModuleLoad (node:internal/modules/cjs/loader:255:19) at Module.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:154:5) at node:internal/main/run_main_module:33:47 { generatedMessage: false, code: 'ERR_ASSERTION', actual: 'ff106f2203666f6f5e007b01', expected: 'ff0f6f2203666f6f5e007b01', operator: 'deepStrictEqual', diff: 'simple' } Node.js v27.0.0-pre Command: out/Release/node --expose-internals /Users/runner/work/_temp/node-v27.0.0-nightly2026-05-2175730e37ef-slim/test/parallel/test-v8-serdes.js