benjamn
commented
6 years ago Yeah, Regenerator expects destructuring syntax to have been compiled earlier in the pipeline. Implementing special logic for destructuring in Regenerator itself would fix this problem, but I don't think there are any JS engines that natively support destructuring but not generator functions, so you should either be compiling both destructuring and generators (in that order), or neither.
jeremytenjo
async function foo(bar) { let [key,value] = [2, 3]; }
=>
Error while reading module test: TypeError: unknown: Cannot read property '0' of null at isHelper (/somewhere/regenerator/node_modules/babel-generator/lib/node/whitespace.js:40:48) at VariableDeclaration (/somewhere/regenerator/node_modules/babel-generator/lib/node/whitespace.js:95:21) at find (/somewhere/regenerator/node_modules/babel-generator/lib/node/index.js:93:15) at needsWhitespace (/somewhere/regenerator/node_modules/babel-generator/lib/node/index.js:115:19) at needsWhitespaceBefore (/somewhere/regenerator/node_modules/babel-generator/lib/node/index.js:131:10) at Generator._printNewline (/somewhere/regenerator/node_modules/babel-generator/lib/printer.js:467:11) at Generator.printJoin (/somewhere/regenerator/node_modules/babel-generator/lib/printer.js:364:32) at Generator.printSequence (/somewhere/regenerator/node_modules/babel-generator/lib/printer.js:420:17) at Generator.BlockStatement (/somewhere/regenerator/node_modules/babel-generator/lib/generators/base.js:43:10) at /somewhere/regenerator/node_modules/babel-generator/lib/printer.js:298:23 From previous event: at buildP (/somewhere/regenerator/node_modules/commoner/lib/reader.js:167:16) at /somewhere/regenerator/node_modules/commoner/lib/reader.js:195:28 From previous event: at ModuleReader. (/somewhere/regenerator/node_modules/commoner/lib/reader.js:97:38)
at ModuleReader.wrapper [as readModuleP] (/somewhere/regenerator/node_modules/commoner/lib/util.js:53:31)
at Array.map (native)
at /somewhere/regenerator/node_modules/commoner/lib/reader.js:231:32
From previous event:
at rebuild (/somewhere/regenerator/node_modules/commoner/lib/commoner.js:135:14)
at _combinedTickCallback (internal/process/next_tick.js:95:7)
async function foo(bar) { let key = 2; let value = 3; }
=> no error