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java.lang.IllegalStateException: 'yield' expression is not within a generator function.
See original GitHub issueI tried to transpile down the vscode frontend from es2020 to es2015 in order to use it on a machine that does not support newer browsers. Rare use case but should work in a bug free world. 😃
For that, I grabbed closure-compiler-v20211107.jar and used it like this:
/usr/lib/code-server/vendor/modules/code-oss-dev/out/vs/workbench# closure-compiler --js workbench.web.api.js --js_output_file workbench.web.api.js --language_in ECMASCRIPT_2020 --language_out ECMASCRIPT_2015
java.lang.IllegalStateException: 'yield' expression is not within a generator function. Reference node:
YIELD 1461:4095 [length: 32] [source_file: workbench.web.api.js]
CALL 1461:4095 [length: 26] [source_file: workbench.web.api.js]
GETPROP createTerminal 1461:4095 [length: 14] [source_file: workbench.web.api.js]
NAME L 1461:4095 [length: 4] [source_file: workbench.web.api.js]
NAME E 1461:4095 [length: 1] [source_file: workbench.web.api.js]
NAME M 1461:4095 [length: 1] [source_file: workbench.web.api.js]
NAME J 1461:4095 [length: 1] [source_file: workbench.web.api.js]
Parent node:
NAME la 1461:4095 [length: 40] [source_file: workbench.web.api.js] [constant_var_flags: 2]
YIELD 1461:4095 [length: 32] [source_file: workbench.web.api.js]
CALL 1461:4095 [length: 26] [source_file: workbench.web.api.js]
GETPROP createTerminal 1461:4095 [length: 14] [source_file: workbench.web.api.js]
NAME L 1461:4095 [length: 4] [source_file: workbench.web.api.js]
NAME E 1461:4095 [length: 1] [source_file: workbench.web.api.js]
NAME M 1461:4095 [length: 1] [source_file: workbench.web.api.js]
NAME J 1461:4095 [length: 1] [source_file: workbench.web.api.js]
at com.google.javascript.jscomp.AstValidator$1.handleViolation(AstValidator.java:86)
at com.google.javascript.jscomp.AstValidator.violation(AstValidator.java:1995)
at com.google.javascript.jscomp.AstValidator.validateYieldWithinGeneratorFunction(AstValidator.java:613)
at com.google.javascript.jscomp.AstValidator.validateYield(AstValidator.java:607)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:440)
at com.google.javascript.jscomp.AstValidator.validateNameDeclarationChild(AstValidator.java:1262)
at com.google.javascript.jscomp.AstValidator.validateNameDeclarationHelper(AstValidator.java:1227)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:206)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateBlock(AstValidator.java:941)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpressionHelper(AstValidator.java:1052)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpression(AstValidator.java:1034)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:424)
at com.google.javascript.jscomp.AstValidator.validateCall(AstValidator.java:1119)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:412)
at com.google.javascript.jscomp.AstValidator.validateBinaryOp(AstValidator.java:1905)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:380)
at com.google.javascript.jscomp.AstValidator.validateIf(AstValidator.java:1450)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:201)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateBlock(AstValidator.java:941)
at com.google.javascript.jscomp.AstValidator.validateIf(AstValidator.java:1451)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:201)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateBlock(AstValidator.java:941)
at com.google.javascript.jscomp.AstValidator.validateFunctionBody(AstValidator.java:1082)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpressionHelper(AstValidator.java:1058)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpression(AstValidator.java:1034)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:424)
at com.google.javascript.jscomp.AstValidator.validatePseudoExpression(AstValidator.java:480)
at com.google.javascript.jscomp.AstValidator.validateCall(AstValidator.java:1122)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:412)
at com.google.javascript.jscomp.AstValidator.validateReturn(AstValidator.java:1467)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:212)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateBlock(AstValidator.java:941)
at com.google.javascript.jscomp.AstValidator.validateFunctionBody(AstValidator.java:1082)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpressionHelper(AstValidator.java:1058)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpression(AstValidator.java:1034)
at com.google.javascript.jscomp.AstValidator.validateMemberFunction(AstValidator.java:918)
at com.google.javascript.jscomp.AstValidator.validateClassMember(AstValidator.java:877)
at com.google.javascript.jscomp.AstValidator.validateClassMembers(AstValidator.java:867)
at com.google.javascript.jscomp.AstValidator.validateClassHelper(AstValidator.java:861)
at com.google.javascript.jscomp.AstValidator.validateClassDeclaration(AstValidator.java:833)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:231)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateBlock(AstValidator.java:941)
at com.google.javascript.jscomp.AstValidator.validateFunctionBody(AstValidator.java:1082)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpressionHelper(AstValidator.java:1058)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpression(AstValidator.java:1034)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:424)
at com.google.javascript.jscomp.AstValidator.validatePseudoExpression(AstValidator.java:480)
at com.google.javascript.jscomp.AstValidator.validateCall(AstValidator.java:1122)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:412)
at com.google.javascript.jscomp.AstValidator.validateExprStmt(AstValidator.java:1460)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:209)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateBlock(AstValidator.java:941)
at com.google.javascript.jscomp.AstValidator.validateFunctionBody(AstValidator.java:1082)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpressionHelper(AstValidator.java:1058)
at com.google.javascript.jscomp.AstValidator.validateFunctionExpression(AstValidator.java:1034)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:424)
at com.google.javascript.jscomp.AstValidator.validatePropertyReferenceTarget(AstValidator.java:1662)
at com.google.javascript.jscomp.AstValidator.validateGetProp(AstValidator.java:1644)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:392)
at com.google.javascript.jscomp.AstValidator.validateCall(AstValidator.java:1119)
at com.google.javascript.jscomp.AstValidator.validateExpression(AstValidator.java:412)
at com.google.javascript.jscomp.AstValidator.validateExprStmt(AstValidator.java:1460)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:209)
at com.google.javascript.jscomp.AstValidator.validateStatement(AstValidator.java:153)
at com.google.javascript.jscomp.AstValidator.validateStatements(AstValidator.java:147)
at com.google.javascript.jscomp.AstValidator.validateScript(AstValidator.java:136)
at com.google.javascript.jscomp.AstValidator.validateCodeRoot(AstValidator.java:123)
at com.google.javascript.jscomp.AstValidator.process(AstValidator.java:109)
at com.google.javascript.jscomp.PhaseOptimizer$NamedPass.process(PhaseOptimizer.java:317)
at com.google.javascript.jscomp.PhaseOptimizer.process(PhaseOptimizer.java:232)
at com.google.javascript.jscomp.Compiler.performTranspilationAndOptimizations(Compiler.java:2573)
at com.google.javascript.jscomp.Compiler.lambda$stage2Passes$5(Compiler.java:939)
at com.google.javascript.jscomp.CompilerExecutor.lambda$runInCompilerThread$0(CompilerExecutor.java:101)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
From this output, I cannot tell which part of the file causes this, I am sorry. But you can reproduce it if you install code-server. This may help: https://github.com/cdr/code-server/tree/v3.12.0/vendor
Issue Analytics
- State:
- Created 2 years ago
- Comments:12 (8 by maintainers)
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ExpressionDecomposercan do this except for a few edge cases, but apparently we previously opted to use the arrow-function approach instead. Likely this was partly because it seemed a more elegant solution at the time and partly because handling destructuring of for-loops that contain multiple variable declarations (e.g.for (let x = 3, [y, z] = obj; ...gets tricky.Now it doesn’t seem so elegant. I’m thinking the right approach is to first wrap such for-loops in a block and extract the declaration part into the block. Then the compiler can successfully break it into multiple declaration statements, which is a prerequisite for
Es6RewriteDestructuringto useExpressionDecomposerthe way we want. Once that’s done, I think we can useExpressionDecomposerinEs6RewriteDestructuringinstead of creating IIFEs to transpile the destructuring.I have a fix for this in internal review.