Eclipse Build Error

[andymel123]

It happened when I copied a function from another project (js) into my new ts project.
After replacing all "var" by "let" the error disappeared.

When I change a let back to var the error message starts again.

Here is the content of the Details page

Errors occurred during the build.
Errors running builder 'TypeScript Builder' on project 'BeachDefenseTS'.
Error while compiling with tsserver
java.util.concurrent.ExecutionException: ts.TypeScriptException: Error processing request. Debug Failure. 
Error: Debug Failure. 
    at typeToString (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:24720:22)
    at reportRelationError (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30049:34)
    at isRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30166:21)
    at typeArgumentsRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30317:35)
    at structuredTypeRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30455:38)
    at recursiveTypeRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30366:53)
    at isRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30153:38)
    at checkTypeRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30032:26)
    at checkTypeAssignableTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:29772:20)
    at checkVariableLikeDeclaration (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:38367:21)
Error while compiling with tsserver
java.util.concurrent.ExecutionException: ts.TypeScriptException: Error processing request. Debug Failure. 
Error: Debug Failure. 
    at typeToString (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:24720:22)
    at reportRelationError (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30049:34)
    at isRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30166:21)
    at typeArgumentsRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30317:35)
    at structuredTypeRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30455:38)
    at recursiveTypeRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30366:53)
    at isRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30153:38)
    at checkTypeRelatedTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:30032:26)
    at checkTypeAssignableTo (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:29772:20)
    at checkVariableLikeDeclaration (E:\...\.metadata\.plugins\ts.repository\repositories\2.4.1\node_modules\typescript\lib\tsserver.js:38367:21)

[andymel123]

That var<=>let behavior described above was just some non-deterministic symptom I guess. The error still happened afterwards.

Changing the used typescript version from 2.4.1 to 2.3.3 did help. Now it works.
Still there is some problem with version 2.4.1.

[angelozerr]

Please try to install last version of TypeScript 2.6.2 and retry it. It's a problem with TypeScript tsserver not with typescript.java