Make sure style is defined before getting its first character

dpvc · dpvc · commit d5ec98ec52f2 · 2021-05-13T12:50:02.000-04:00
diff --git a/ts/input/tex/base/BaseMethods.ts b/ts/input/tex/base/BaseMethods.ts
@@ -1386,7 +1386,7 @@ BaseMethods.Array = function(parser: TexParser, begin: StackItem,
     // @test Cross Product
     array.setProperty('close', parser.convertDelimiter(close));
   }
-  if (style.charAt(1) === '\'') {
+  if ((style || '').charAt(1) === '\'') {
     array.arraydef['data-cramped'] = true;
     style = style.charAt(0);
   }

Original file line number	Diff line number	Diff line change
`@@ -1386,7 +1386,7 @@ BaseMethods.Array = function(parser: TexParser, begin: StackItem,`
`1386`	`1386`	`// @test Cross Product`
`1387`	`1387`	`array.setProperty('close', parser.convertDelimiter(close));`
`1388`	`1388`	`}`
`1389`		`- if (style.charAt(1) === '\'') {`
	`1389`	`+ if ((style \|\| '').charAt(1) === '\'') {`
`1390`	`1390`	`array.arraydef['data-cramped'] = true;`
`1391`	`1391`	`style = style.charAt(0);`
`1392`	`1392`	`}`