strange stacktrace #3177
Comments
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its the JVM trying to get you some information about why you're "deep into recursion" ... the script as-is simply won't work without the JVM failing with a java_import 'Test'
test = Test.new {
2.times { puts "running #{self}" }
}
test.run |
|
I debugged with jdb and I found the cause of the bug. I rewrote the test programs to clarify the cause. public class Test {
private Runnable r;
public Test(Runnable run)
{
r = run;
}
public void java_run(int i) throws Exception
{
if (i == 2)
{
throw new Exception();
}
else
{
r.run();
}
}
}java_import 'Test'
i = 0
test = Test.new {
1.times {
begin
test.java_run(i += 1)
rescue java.lang.Exception
puts $!.backtrace
puts
raise
end
}
}
begin
test.java_run(0)
rescue java.lang.Exception
puts $!.backtrace
endThe following is the output. |
|
OK, now I get it - the new code helped me to grasp, thanks! confirmed on 1.7.21 as well, fix on its way ... |
kares
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Aug 8, 2015
…3177) ... some parts e.g. Java based core-methods had their filename part incorrect when re-thrown (adding package prefix path twice)
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|
fix works but there's another issue appearing when exception is re-thrown - duplicating .rb parts e.g. : |
kares
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Aug 10, 2015
kares
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* jruby-1_7: FrameType's INTERPRETER_ constants are a leaky abstraction - deprecate for now we do not care about duplicate .rb frames in re-thrown Java exception occupy less space with FrameType's static collections deprecate no longer used Helpers.invokeMethodMissing method toArray one-liner add a test reproducing backtrace issue #3177 improve backtrace rewriting when native exception is re-thrown (fixes #3177) more test_backtraces TODO left-overs ... these are passing just fine as well removed TODOs in test_backtraces - they seem to be all passing cleanup test_backtraces save an interim builder+string with mangleStringForCleanJavaIdentifier + guess string builder length for possibly less internal array resizing avoid 'too much' of try-catch IOException - throw runtime error directly minor name mangler cleanup + "micro opts" - slightly less code to execute cleanup JRubyFile Conflicts: core/src/main/java/org/jruby/runtime/backtrace/BacktraceData.java core/src/main/java/org/jruby/runtime/backtrace/FrameType.java core/src/main/java/org/jruby/util/JRubyFile.java test/test_backtraces.rb
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"org/jruby/" appears many times in the stacktrace of the following script.
Test.java
test.rb
output
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