`Bus error` on some node-test-linter jobs

[sxa]

When looking at the reliability reports I spotted that there have beena few occurrences of a bus error when running the node-tet-linter job:

Job	Machine	PR
67802	mnx-1	66546
67779	mnx-1	66463
67778	mnx-1	66496
67777	mnx-1	66498

Examples:

21:18:58 + make lint-ci PYTHON=python3
21:18:58 cd tools/eslint && if [ -x '/home/iojs/build/workspace/node-test-linter@3/node' ] && [ -e '/home/iojs/build/workspace/node-test-linter@3/node' ]; then PATH='/home/iojs/build/workspace/node-test-linter@3/out/Release:$PATH' '/home/iojs/build/workspace/node-test-linter@3/node' /home/iojs/build/workspace/node-test-linter@3/./deps/npm/bin/npm-cli.js ci --omit=dev; elif [ -x `command -v node` ] && [ -e `command -v node` ] && [ `command -v node` ]; then `command -v node` /home/iojs/build/workspace/node-test-linter@3/./deps/npm/bin/npm-cli.js ci --omit=dev; else echo "No available node, cannot run \"node /home/iojs/build/workspace/node-test-linter@3/./deps/npm/bin/npm-cli.js ci --omit=dev\""; exit 1; fi;
21:18:58 Bus error (core dumped)

21:15:39 + make lint-ci PYTHON=python3
21:15:39 cd tools/eslint && if [ -x '/home/iojs/build/workspace/node-test-linter/node' ] && [ -e '/home/iojs/build/workspace/node-test-linter/node' ]; then PATH='/home/iojs/build/workspace/node-test-linter/out/Release:$PATH' '/home/iojs/build/workspace/node-test-linter/node' /home/iojs/build/workspace/node-test-linter/./deps/npm/bin/npm-cli.js ci --omit=dev; elif [ -x `command -v node` ] && [ -e `command -v node` ] && [ `command -v node` ]; then `command -v node` /home/iojs/build/workspace/node-test-linter/./deps/npm/bin/npm-cli.js ci --omit=dev; else echo "No available node, cannot run \"node /home/iojs/build/workspace/node-test-linter/./deps/npm/bin/npm-cli.js ci --omit=dev\""; exit 1; fi;
21:15:39 
21:15:39 added 235 packages, and audited 236 packages in 9s
21:19:43 
21:19:43 99 packages are looking for funding
21:19:43   run `npm fund` for details
21:19:43 
21:19:43 found 0 vulnerabilities
21:19:43 Running JS linter...
21:19:43 Bus error (core dumped)
21:19:44 make: *** [Makefile:1564: lint-js-ci] Error 135

[sxa]

I hit a few failures (67827-67830) when running some of the jobs concurrently so for now I'm going to edit the configuration of the job to prevent concurrent execution. Given that the job runs relatively quickly vs node-test-commit I don't think this will cause any significant backlog/problems, although it won't really fix the underlying issue.