Status: New
Owner: ----
New issue 2981 by [email protected]: debugger: breakpoints in anonymous
functions don't always work
http://code.google.com/p/v8/issues/detail?id=2981
Test case:
function f(g) { g() }
f.f = f; // comment this out to make it work
f(function() {
return f; // put breakpoint here
});
If you set the breakpoint before control reaches line 2, then the
breakpoint is never hit. If you set it afterwards, it works. Naming the
function or putting a debugger statement inside also fixes it. Tested with
node.js v0.11.9-pre 962686b with V8 3.21.18.3.
The command that node.js sends
is '{"command":"setbreakpoint","arguments":{"type":"scriptId","target":"36","line":3}}'
(where the script ID matches the file that's being debugged.)
I couldn't check V8 HEAD because the following happens when compiled with
extrachecks=on i18nsupport=off:
$ out/x64.debug/d8 --debugger t.js
JavaScript debugger enabled
#
# Fatal error in ../src/api.h, line 402
# CHECK(that == __null || !(*reinterpret_cast<v8::internal::JSObject**>(
const_cast<v8::Object*>(that)))->IsFailure()) failed
#
==== C stack trace ===============================
1: ??
2: ??
3: ??
4: ??
5: ??
6: ??
7: ??
8: ??
9: ??
10: ??
11: ??
12: ??
13: ??
14: ??
15: ??
16: ??
17: ??
18: ??
Trace/BPT trap: 5
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