Print out the output line that fails json parsing

Jonathan Turner · Jonathan Turner · commit d25688e6a739 · 2016-05-03T17:25:35.000-07:00
diff --git a/src/tools/compiletest/src/json.rs b/src/tools/compiletest/src/json.rs
@@ -72,7 +72,8 @@ fn parse_line(file_name: &str, line: &str) -> Vec<Error> {
                 expected_errors
             }
             Err(error) => {
-                panic!("failed to decode compiler output as json: `{}`", error);
+                panic!("failed to decode compiler output as json: `{}` when parsing: {}", error,
+                    line);
             }
         }
     } else {

Original file line number	Diff line number	Diff line change
`@@ -72,7 +72,8 @@ fn parse_line(file_name: &str, line: &str) -> Vec<Error> {`
`72`	`72`	`expected_errors`
`73`	`73`	`}`
`74`	`74`	`Err(error) => {`
`75`		- panic!("failed to decode compiler output as json: `{}`", error);
	`75`	+ panic!("failed to decode compiler output as json: `{}` when parsing: {}", error,
	`76`	`+ line);`
`76`	`77`	`}`
`77`	`78`	`}`
`78`	`79`	`} else {`