Handle diagnostic with unknown file (microsoft#23681)

Andy · web-flow · commit 3ebcbd4d44d1 · 2018-04-25T13:11:35.000-07:00
diff --git a/scripts/buildProtocol.ts b/scripts/buildProtocol.ts
@@ -178,7 +178,7 @@ function writeProtocolFile(outputFile: string, protocolTs: string, typeScriptSer
     ts.sys.writeFile(outputFile, protocolDts);
 
     if (diagnostics.length) {
-        const flattenedDiagnostics = diagnostics.map(d => `${ts.flattenDiagnosticMessageText(d.messageText, "\n")} at ${d.file.fileName} line ${d.start}`).join("\n");
+        const flattenedDiagnostics = diagnostics.map(d => `${ts.flattenDiagnosticMessageText(d.messageText, "\n")} at ${d.file ? d.file.fileName : "<unknown>"} line ${d.start}`).join("\n");
         throw new Error(`Unexpected errors during sanity check: ${flattenedDiagnostics}`);
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -178,7 +178,7 @@ function writeProtocolFile(outputFile: string, protocolTs: string, typeScriptSer`
`178`	`178`	`ts.sys.writeFile(outputFile, protocolDts);`
`179`	`179`
`180`	`180`	`if (diagnostics.length) {`
`181`		- const flattenedDiagnostics = diagnostics.map(d => `${ts.flattenDiagnosticMessageText(d.messageText, "\n")} at ${d.file.fileName} line ${d.start}`).join("\n");
	`181`	+ const flattenedDiagnostics = diagnostics.map(d => `${ts.flattenDiagnosticMessageText(d.messageText, "\n")} at ${d.file ? d.file.fileName : "<unknown>"} line ${d.start}`).join("\n");
`182`	`182`	throw new Error(`Unexpected errors during sanity check: ${flattenedDiagnostics}`);
`183`	`183`	`}`
`184`	`184`	`}`