': undefined local variable or method `foo’ for main:Object (NameError) ---

**Author:** ![wanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/51bf81/32.png) [@wanabe](https://www.ruby-forum.com/u/wanabe)\ **Post date:** [April 27, 2008, 6:07am UTC](https://www.ruby-forum.com/t/patch-for-ruby-dev-34236/135273/6 "2008-04-27T06:07:26Z")

e$B!!$5$5$@$G$9!%e(B wanabe wrote: > iseq e$B$K?($i$:!"e(Brb\_block\_t e$B$Ke(B cref e$B$r;}$?$;$k$h$&$K=q$-D\>$7$^$7$?!#e(B > e$B1sF#$5$s$N=q$+$l$?Nc$,F0:n$9$k$h$&$K$9$k$?$a!“e(B1.8e$B$HF1$8$h$&$Ke(B > instance\_eval/module\_eval e$B$N%V%m%C%/$K0z?te(B self e$B$rM?$($k$h$&$K$7$F$$$^$9!#e(B > e$B!Je(Byield\_under(klass, self, rb\_ary\_new3(1, self))e$B$NItJ,!Ke(B > e$BLdBj$,$”$j$^$7$?$i$3$NItJ,$OL5;k$7$F$/$@$5$$!#e(B e$B!!$$$D$b$"$j$,$H$&$4$6$$$^$9!%:#$^$5$K$3$NLdBj$K4X$7$F%G%P%C%0Cf$G$9!%e(B e$B!!e(Bcref e$B$r%U%l!\<%`$4$H$K;}$?$J$$$N$O!$%l%"%1!\<%9$N$?$a$KB\>$rCY$/$9$ke(B e$B$N$,7y$@$C$?$N$G!$:#$N$h$&$J$b$N$K$J$C$F$$$^$9!%=PMh$l$P!$$3$N$^$^$Ge(B e$B:Q$^$;$k$3$H$,=PMh$J$$$+!$G:$s$G$$$^$9!%e(B e$B!!$=$l$O$H$b$+$/!$\$7J}$r9M$(Cf$G$9!%6qBNE\*$K$O!$e(B1.8 e$B$Ne(B ruby\_class e$B$He(B ruby\_cref e$B$rF10l;k$7$F$$$?$s$G$9$,!$\ **Author:** ![wanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/51bf81/32.png) [@wanabe](https://www.ruby-forum.com/u/wanabe)\ **Post date:** [April 27, 2008, 5:56am UTC](https://www.ruby-forum.com/t/patch-for-ruby-dev-34236/135273/7 "2008-04-27T05:56:19Z") e$B%o%J%Y$G$9!#e(B 08/04/21 e$B$Ke(B Yusuke ENDOH[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) e$B$5$s$O=q$-$^$7$?e(B: > 2008/04/21 9:57 SASADA Koichi [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > > > e$B$3$l!$$Q$C$HNc$,=P$J$$$s$G$9$,!$K\Ev$KBg\>fIW$G$7$g$&$+!%e(Biseq e$B$KBPe(B > > e$B$9$k%"%/%;%9$J$N$G!$I{:nMQ$,!%e(B > > e$B$3$s$J46$8$N%3!\<%I$G5sF0$,JQ$o$j$^$9$M!#e(B iseq e$B$K?($i$:!"e(Brb\_block\_t e$B$Ke(B cref e$B$r;}$?$;$k$h$&$K=q$-D\>$7$^$7$?!#e(B e$B1sF#$5$s$N=q$+$l$?Nc$,F0:n$9$k$h$&$K$9$k$?$a!“e(B1.8e$B$HF1$8$h$&$Ke(B instance\_eval/module\_eval e$B$N%V%m%C%/$K0z?te(B self e$B$rM?$($k$h$&$K$7$F$$$^$9!#e(B e$B!Je(Byield\_under(klass, self, rb\_ary\_new3(1, self))e$B$NItJ,!Ke(B e$BLdBj$,$”$j$^$7$?$i$3$NItJ,$OL5;k$7$F$/$@$5$$!#e(B # Index: vm\_core.h — vm\_core.h (revision 16174) +++ vm\_core.h (working copy) @@ -337,6 +337,7 @@ VALUE _dfp; /_ share with method frame if it’s only block \*/ rb\_iseq\_t \*iseq; VALUE proc; - NODE \*cref; } rb\_block\_t; # #define GetThreadPtr(obj, ptr) Index: eval.c — eval.c (revision 16174) +++ eval.c (working copy) @@ -1845,6 +1845,9 @@ block = \*blockptr; block.self = self; \*th-\>cfp-\>lfp = GC\_GUARDED\_PTR(&block); - stored\_cref = block.cref; - block.cref = vm\_cref\_push(th, under, NOEX\_PUBLIC); - block.cref-\>nd\_file = stored\_cref; } - return yield\_under(klass, self, Qundef); - return yield\_under(klass, self, rb\_ary\_new3(1, self)); } else { char \*file = “(eval)”; Index: vm.c =================================================================== — vm.c (revision 16174) +++ vm.c (working copy) @@ -261,6 +261,7 @@ env-\>block.lfp = cfp-\>lfp; env-\>block.dfp = cfp-\>dfp; env-\>block.iseq = cfp-\>iseq; - env-\>block.cref = 0; - proc-\>block.cref = 0; proc-\>block.proc = procval; proc-\>envval = envval; proc-\>safe\_level = th-\>safe\_level; @@ -539,6 +541,8 @@ return vm\_call\_super(GET\_THREAD(), argc, argv); } +void vm\_cfp\_svar\_set(rb\_thread\_t \*th, rb\_control\_frame\_t _cfp, VALUE key, VALUE val); + /_ C → Ruby: block \*/ static VALUE @@ -568,6 +572,10 @@ self, GC\_GUARDED\_PTR(block-\>dfp), iseq-\>iseq\_encoded + opt\_pc, cfp-\>sp + arg\_size, block-\>lfp, iseq-\>local\_size - arg\_size); - if (block-\>cref) { - ``` vm_cfp_svar_set(th, th->cfp, 2, (VALUE)block->cref); ``` - ``` block->cref = block->cref->nd_file; ``` - } - ``` blockptr->cref = 0; *block = blockptr; ``` } }