Help with failed build tests

Node.js Version: 8.1.2
OS: RHEL 7
Scope (install, code, runtime, meta, other?): build
Module (and version) (if relevant):

Hi, I have some failed build tests on RHEL 7 that I would like to consult.

These two have been failing for v4 and v6 too:

=== release test-net-better-error-messages-port-hostname ===
Path: parallel/test-net-better-error-messages-port-hostname
assert.js:60
  throw new errors.AssertionError({
  ^
AssertionError [ERR_ASSERTION]: 'EAI_AGAIN' === 'ENOTFOUND'
    at Socket.<anonymous> (/builddir/build/BUILD/node-v8.1.2/test/parallel/test-net-better-error-messages-port-hostname.js:12:10)
    at Socket.<anonymous> (/builddir/build/BUILD/node-v8.1.2/test/common/index.js:517:15)
    at emitOne (events.js:115:13)
    at Socket.emit (events.js:210:7)
    at emitErrorNT (internal/streams/destroy.js:62:8)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9)
Command: out/Release/node /builddir/build/BUILD/node-v8.1.2/test/parallel/test-net-better-error-messages-port-hostname.js
                                                      
=== release test-net-connect-immediate-finish ===
Path: parallel/test-net-connect-immediate-finish
assert.js:60
  throw new errors.AssertionError({
  ^
AssertionError [ERR_ASSERTION]: 'EAI_AGAIN' === 'ENOTFOUND'
    at Socket.client.once.common.mustCall (/builddir/build/BUILD/node-v8.1.2/test/parallel/test-net-connect-immediate-finish.js:32:10)
    at Socket.<anonymous> (/builddir/build/BUILD/node-v8.1.2/test/common/index.js:517:15)
    at Object.onceWrapper (events.js:316:30)
    at emitOne (events.js:115:13)
    at Socket.emit (events.js:210:7)
    at emitErrorNT (internal/streams/destroy.js:62:8)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9)
Command: out/Release/node /builddir/build/BUILD/node-v8.1.2/test/parallel/test-net-connect-immediate-finish.js

These fail only with v8:

=== release test-util-inspect ===
Path: parallel/test-util-inspect
/builddir/build/BUILD/node-v8.1.2/test/parallel/test-util-inspect.js:85
assert.strictEqual(util.inspect(process.stdin._handle._externalStream),
                                                     ^
TypeError: Cannot read property '_externalStream' of undefined
    at Object.<anonymous> (/builddir/build/BUILD/node-v8.1.2/test/parallel/test-util-inspect.js:85:54)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)
    at Function.Module.runMain (module.js:605:10)
    at startup (bootstrap_node.js:158:16)
    at bootstrap_node.js:575:3
Command: out/Release/node /builddir/build/BUILD/node-v8.1.2/test/parallel/test-util-inspect.js

=== release test-v8-serdes ===
Path: parallel/test-v8-serdes
assert.js:60
  throw new errors.AssertionError({
  ^
AssertionError [ERR_ASSERTION]: Missing expected exception.
    at _throws (assert.js:553:5)
    at Function.throws (assert.js:577:3)
    at Object.<anonymous> (/builddir/build/BUILD/node-v8.1.2/test/parallel/test-v8-serdes.js:98:10)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)
    at Function.Module.runMain (module.js:605:10)
    at startup (bootstrap_node.js:158:16)
Command: out/Release/node /builddir/build/BUILD/node-v8.1.2/test/parallel/test-v8-serdes.js

I use shared zlib-1.2.7, compared to zlib-1.2.11, so maybe that fails this test:

Path: parallel/test-zlib-failed-init
assert.js:60
  throw new errors.AssertionError({
  ^
AssertionError [ERR_ASSERTION]: Missing expected exception.
    at _throws (assert.js:553:5)
    at Function.throws (assert.js:577:3)
    at Object.<anonymous> (/builddir/build/BUILD/node-v8.1.2/test/parallel/test-zlib-failed-init.js:11:8)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)
    at Function.Module.runMain (module.js:605:10)
    at startup (bootstrap_node.js:158:16)
Command: out/Release/node /builddir/build/BUILD/node-v8.1.2/test/parallel/test-zlib-failed-init.js