hnlq715 commented on issue #3502:
URL: https://github.com/apache/apisix/issues/3502#issuecomment-773683487
Seems like systemtap tools not compatible with luajit2.1, I'll try the
openresty with luajit2.0
```
sudo ./ngx-lua-bt --luajit20 -p 4923
WARNING: Probe 'process' has been elided: keyword at <input>:369:1
source: probe
^
semantic error: unable to find member 'fr' for union TValue (alternatives:
gcr, i, n, it, u32, u64, ftsz, it64): operator '->' at :32:99
source: return @cast(tvalue, "TValue",
"/usr/local/openresty-debug/luajit/lib/libluajit-5.1.so.2.1.0")->fr->tp->ftsz
```
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