sfdx force:source:push fails with “TypeError: version.match is not a function”

Question

I am getting the following error after attempting to run the following command to push some code to a new scratch org:

sfdx force:source:push -u tb-prototype --dev-debug

Error message:

  ERROR running force:source:push:  version.match is not a function 
*** Internal Diagnostic ***

TypeError: version.match is not a function
    at MdapiPackage.setVersion (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/mdapiPackage.js:111:25)
    at new MdapiPackage (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/mdapiPackage.js:103:14)
    at generateMetadataManifestJson (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/manifestCreateApi.js:39:23)
    at manifestCreate.createManifest (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/manifestCreateApi.js:166:33)
    at Function.createPackageManifests (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/sourceConvertApi.js:220:14)
    at /usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/sourceConvertApi.js:119:37
    at async MdapiPushApi.doDeploy (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/sourcePushApi.js:47:32)
From previous event:
    at processImmediate (internal/timers.js:456:21)
From previous event:
    at SourceApiCommand.execute (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/lib/source/sourceApiCommand.js:52:14)
    at SourcePushCommand.execLegacyCommand (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/ToolbeltCommand.js:148:43)
    at async SourcePushCommand.run (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/commands/force/source/push.js:25:16)
    at async SourcePushCommand._run (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/node_modules/@salesforce/command/lib/sfdxCommand.js:91:40)
    at async Config.runCommand (/usr/local/lib/node_modules/sfdx-cli/node_modules/@oclif/config/lib/config.js:172:9)
    at async Main.run (/usr/local/lib/node_modules/sfdx-cli/node_modules/@oclif/command/lib/main.js:22:9)
    at async Main._run (/usr/local/lib/node_modules/sfdx-cli/node_modules/@oclif/command/lib/command.js:43:20)
    at async Object.run (/usr/local/lib/node_modules/sfdx-cli/dist/cli.js:32:20)
Outer stack:
    at Function.wrap (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/node_modules/@salesforce/core/lib/sfdxError.js:151:27)
    at SourcePushCommand.catch (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/dist/ToolbeltCommand.js:246:46)
    at async SourcePushCommand._run (/usr/local/lib/node_modules/sfdx-cli/node_modules/salesforce-alm/node_modules/@salesforce/command/lib/sfdxCommand.js:95:13)
    at async Config.runCommand (/usr/local/lib/node_modules/sfdx-cli/node_modules/@oclif/config/lib/config.js:172:9)
    at async Main.run (/usr/local/lib/node_modules/sfdx-cli/node_modules/@oclif/command/lib/main.js:22:9)
    at async Main._run (/usr/local/lib/node_modules/sfdx-cli/node_modules/@oclif/command/lib/command.js:43:20)
    at async Object.run (/usr/local/lib/node_modules/sfdx-cli/dist/cli.js:32:20)
******

I have updated to the latest version of sfdx to no useful effect...

Any ideas?