Error: Debug Failure. Unhandled declaration kind! 241 at getTypeOfVariableOrParameterOrPropertyWorker

[minestarks]

TypeScript Version: 3.1.0-dev.20180925

git clone --depth=1 https://github.com/google/lovefield.git
cd lovefield
tsc --init
tsc --allowJs --checkJs

Compiler crashes with the callstack:

Error: Debug Failure. Unhandled declaration kind! 241 for { flags: 100665092; declarations: 241,187,187,71 }
    at getTypeOfVariableOrParameterOrPropertyWorker (node_modules\typescript\lib\tsc.js:28800:33)
    at getTypeOfVariableOrParameterOrProperty (node_modules\typescript\lib\tsc.js:28725:48)
    at getTypeOfSymbol (node_modules\typescript\lib\tsc.js:28990:24)
    at checkPropertyAccessExpressionOrQualifiedName (node_modules\typescript\lib\tsc.js:39419:53)
    at checkPropertyAccessExpression (node_modules\typescript\lib\tsc.js:39371:20)
    at checkExpressionWorker (node_modules\typescript\lib\tsc.js:42384:28)
    at checkExpression (node_modules\typescript\lib\tsc.js:42334:42)
    at checkNonNullExpression (node_modules\typescript\lib\tsc.js:39352:37)
    at checkPropertyAccessExpressionOrQualifiedName (node_modules\typescript\lib\tsc.js:39378:28)
    at checkPropertyAccessExpression (node_modules\typescript\lib\tsc.js:39371:20)

[weswigham]

That'd be an EnumDeclaration merged with 2x PropertyAccessExpression and 1x Identifier, I'd assume one of their enums in their .d.ts is merging with the js source of itself.

[sandersn]

Yes, there are 3 merges for nearly everything:

1. d.ts
2. Closure-style externs.js
3. Implementation JS file.

This project is a gold mine of bugs beyond the OP's crash:

1. Crash when merging enum with expando. (that's the original crash)
2. Crash when merging enum member with expando.
3. Crash when merging interface-declared method declaration with prototype-property-assignment method.

[fijiwebdesign]

I got this error: "Error: Debug Failure. Unhandled declaration kind! GetAccessor" which is same as microsoft/vscode#60462 due to declaring a getter/setter of an existing property.

[sandersn]

@fijiwebdesign Can you open a new bug? Unless you are using TS 3.1 then it is unlikely to be the same one.