OutOfMemoryError in TokenStream#readTemplateLiteral

[katherine-hough]

Rhino Version: 1.7.14
Java Version: OpenJDK 11.0.19

Missing EOF check in TokenStream#readTemplateLiteral causes OutOfMemoryError when parsing a malformed Unicode code point escape in a template literal. The for loop on line 1609 of TokenStream:

rhino/src/org/mozilla/javascript/TokenStream.java

Line 1609 in 5a0e5b3

for (; ; ) {

repeats until an OutOfMemoryError is raised because neither a } nor a ` character is encountered before the end of the input.

Input:

`\u{8

Expected Output: A syntax error

Actual Output:

java.lang.OutOfMemoryError: Java heap space
        at java.util.Arrays.copyOf(Arrays.java:3332)
        at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:124)
        at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:649)
        at java.lang.StringBuilder.append(StringBuilder.java:202)
        at org.mozilla.javascript.TokenStream.getTemplateLiteralChar(TokenStream.java:1480)
        at org.mozilla.javascript.TokenStream.peekTemplateLiteralChar(TokenStream.java:1499)
        at org.mozilla.javascript.TokenStream.readTemplateLiteral(TokenStream.java:1610)

[rbri]

Will have a look....