gcj/198: gcj crashes when trying to compile this code!
mdejong@cygnus.com
mdejong@cygnus.com
Sun Apr 9 05:16:00 GMT 2000
>Number: 198
>Category: gcj
>Synopsis: gcj crashes when trying to compile this code!
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: apbianco
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Apr 09 05:16:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Mo
>Release: egcs from CVS Sun Apr 9
>Organization:
>Environment:
Red Hat 5.2 system.
>Description:
Here is some code that does not compile with javac.
% javac Regexp.java
Regexp.java:553: Method nextMatch() not found in class java.lang.Object.
if (rs.nextMatch()) {
^
Regexp.java:554: Method skipped() not found in class java.lang.Object.
StringBuffer sb = new StringBuffer(rs.skipped());
^
Regexp.java:556: Method rest() not found in class java.lang.Object.
sb.append(rs.rest());
^
Regexp.java:613: Method matched() not found in class java.lang.Object.
sb.append(rs.matched());
^
Regexp.java:620: Method submatch(int) not found in class java.lang.Object.
String match = rs.submatch(ch - '0');
^
Regexp.java:645: Method nextMatch() not found in class java.lang.Object.
if (rs.nextMatch() == false) {
^
Regexp.java:651: Method skipped() not found in class java.lang.Object.
sb.append(rs.skipped());
^
Regexp.java:655: Method nextMatch() not found in class java.lang.Object.
} while (rs.nextMatch());
^
Regexp.java:656: Method rest() not found in class java.lang.Object.
sb.append(rs.rest());
^
9 errors
If I try to compile it with gcj, I get a SIGSEGV.
lookup_do (searched_class=0x8272ba8, searched_interface=0x82d2994,
method_name=0x82b4ddc, signature=0x8295d98,
signature_builder=0x8079fac <build_java_argument_signature>)
at ../../../egcs/gcc/java/typeck.c:784
784 tree iclass = BINFO_TYPE (child);
(gdb) list
779
780 for (i = interface_len; i > 0; i--)
781 {
782 tree child =
783 TREE_VEC_ELT (TYPE_BINFO_BASETYPES (searched_interface), i);
784 tree iclass = BINFO_TYPE (child);
785
786 /* If the superinterface hasn't been loaded yet, do so now. */
787 if (CLASS_FROM_SOURCE_P (iclass))
788 safe_layout_class (iclass);
(gdb) print child
$1 = (union tree_node *) 0x0
So child is getting set to NULL and BINFO_TYPE() is crashing out because of it.
>How-To-Repeat:
Just compile with gcj.
>Fix:
Do we need to do an extra check for NULL before calling
BINFO_TYPE?
>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Disposition: attachment; filename="Regexp.java"
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