From Lua 5.2: debug.getupvalue() returns "" for C function upvalues.
commit998c656dc46e03ed005bb795c3640e56c305b0a5
authorMike Pall <mike>
Wed, 19 Sep 2012 10:03:03 +0000 (19 12:03 +0200)
committerMike Pall <mike>
Wed, 19 Sep 2012 10:03:03 +0000 (19 12:03 +0200)
tree7d73f74cf335332c57a6f900bda62157df78c851
parentead325b0c9deafb23f499f9739acca3bb36c3e46
From Lua 5.2: debug.getupvalue() returns "" for C function upvalues.
src/lib_debug.c