Report error when parsing for line number selection

This makes the failure a little less mysterious.

lib/reporters/default.js

@@ -220,6 +220,9 @@ export default class Reporter {
 				this.lineNumberErrors.push(event);
 
 				this.write(colors.information(`${figures.warning} Could not parse ${this.relativeFile(event.testFile)} for line number selection`));
+				this.lineWriter.writeLine();
+				this.lineWriter.writeLine(colors.errorStack(event.err.stack));
+				this.lineWriter.writeLine();
 				break;
 			}
 

test-tap/reporters/default.edgecases.v12.log

@@ -1,8 +1,20 @@
 
 ---tty-stream-chunk-separator
   ⚠ Could not parse ast-syntax-error.cjs for line number selection
----tty-stream-chunk-separator
 
+  SyntaxError: Unexpected token (3:11)
+      at Parser.pp$4.raise (~/node_modules/acorn/dist/acorn.js:3462:15)
+      at Parser.pp$9.unexpected (~/node_modules/acorn/dist/acorn.js:756:10)
+      at Parser.pp$5.parseExprAtom (~/node_modules/acorn/dist/acorn.js:2837:12)
+      at Parser.pp$5.parseExprSubscripts (~/node_modules/acorn/dist/acorn.js:2629:21)
+      at Parser.pp$5.parseMaybeUnary (~/node_modules/acorn/dist/acorn.js:2595:19)
+      at Parser.pp$5.parseExprOps (~/node_modules/acorn/dist/acorn.js:2522:21)
+      at Parser.pp$5.parseMaybeConditional (~/node_modules/acorn/dist/acorn.js:2505:21)
+      at Parser.pp$5.parseMaybeAssign (~/node_modules/acorn/dist/acorn.js:2472:21)
+      at Parser.pp$8.parseVar (~/node_modules/acorn/dist/acorn.js:1299:26)
+      at Parser.pp$8.parseVarStatement (~/node_modules/acorn/dist/acorn.js:1163:10)
+
+---tty-stream-chunk-separator
   Uncaught exception in ast-syntax-error.cjs
 
   ~/test-tap/fixture/report/edgecases/ast-syntax-error.cjs:3

test-tap/reporters/default.edgecases.v14.log

@@ -1,8 +1,20 @@
 
 ---tty-stream-chunk-separator
   ⚠ Could not parse ast-syntax-error.cjs for line number selection
----tty-stream-chunk-separator
 
+  SyntaxError: Unexpected token (3:11)
+      at Parser.pp$4.raise (~/node_modules/acorn/dist/acorn.js:3462:15)
+      at Parser.pp$9.unexpected (~/node_modules/acorn/dist/acorn.js:756:10)
+      at Parser.pp$5.parseExprAtom (~/node_modules/acorn/dist/acorn.js:2837:12)
+      at Parser.pp$5.parseExprSubscripts (~/node_modules/acorn/dist/acorn.js:2629:21)
+      at Parser.pp$5.parseMaybeUnary (~/node_modules/acorn/dist/acorn.js:2595:19)
+      at Parser.pp$5.parseExprOps (~/node_modules/acorn/dist/acorn.js:2522:21)
+      at Parser.pp$5.parseMaybeConditional (~/node_modules/acorn/dist/acorn.js:2505:21)
+      at Parser.pp$5.parseMaybeAssign (~/node_modules/acorn/dist/acorn.js:2472:21)
+      at Parser.pp$8.parseVar (~/node_modules/acorn/dist/acorn.js:1299:26)
+      at Parser.pp$8.parseVarStatement (~/node_modules/acorn/dist/acorn.js:1163:10)
+
+---tty-stream-chunk-separator
   Uncaught exception in ast-syntax-error.cjs
 
   SyntaxError: Unexpected token 'do'

test-tap/reporters/default.edgecases.v16.log

@@ -1,8 +1,20 @@
 
 ---tty-stream-chunk-separator
   ⚠ Could not parse ast-syntax-error.cjs for line number selection
----tty-stream-chunk-separator
 
+  SyntaxError: Unexpected token (3:11)
+      at Parser.pp$4.raise (~/node_modules/acorn/dist/acorn.js:3462:15)
+      at Parser.pp$9.unexpected (~/node_modules/acorn/dist/acorn.js:756:10)
+      at Parser.pp$5.parseExprAtom (~/node_modules/acorn/dist/acorn.js:2837:12)
+      at Parser.pp$5.parseExprSubscripts (~/node_modules/acorn/dist/acorn.js:2629:21)
+      at Parser.pp$5.parseMaybeUnary (~/node_modules/acorn/dist/acorn.js:2595:19)
+      at Parser.pp$5.parseExprOps (~/node_modules/acorn/dist/acorn.js:2522:21)
+      at Parser.pp$5.parseMaybeConditional (~/node_modules/acorn/dist/acorn.js:2505:21)
+      at Parser.pp$5.parseMaybeAssign (~/node_modules/acorn/dist/acorn.js:2472:21)
+      at Parser.pp$8.parseVar (~/node_modules/acorn/dist/acorn.js:1299:26)
+      at Parser.pp$8.parseVarStatement (~/node_modules/acorn/dist/acorn.js:1163:10)
+
+---tty-stream-chunk-separator
   Uncaught exception in ast-syntax-error.cjs
 
   SyntaxError: Unexpected token 'do'

test-tap/reporters/default.edgecases.v18.log

@@ -1,8 +1,20 @@
 
 ---tty-stream-chunk-separator
   ⚠ Could not parse ast-syntax-error.cjs for line number selection
----tty-stream-chunk-separator
 
+  SyntaxError: Unexpected token (3:11)
+      at pp$4.raise (~/node_modules/acorn/dist/acorn.js:3462:15)
+      at pp$9.unexpected (~/node_modules/acorn/dist/acorn.js:756:10)
+      at pp$5.parseExprAtom (~/node_modules/acorn/dist/acorn.js:2837:12)
+      at pp$5.parseExprSubscripts (~/node_modules/acorn/dist/acorn.js:2629:21)
+      at pp$5.parseMaybeUnary (~/node_modules/acorn/dist/acorn.js:2595:19)
+      at pp$5.parseExprOps (~/node_modules/acorn/dist/acorn.js:2522:21)
+      at pp$5.parseMaybeConditional (~/node_modules/acorn/dist/acorn.js:2505:21)
+      at pp$5.parseMaybeAssign (~/node_modules/acorn/dist/acorn.js:2472:21)
+      at pp$8.parseVar (~/node_modules/acorn/dist/acorn.js:1299:26)
+      at pp$8.parseVarStatement (~/node_modules/acorn/dist/acorn.js:1163:10)
+
+---tty-stream-chunk-separator
   Uncaught exception in ast-syntax-error.cjs
 
   SyntaxError: Unexpected token 'do'