Issue 1:
Inlined functions do not show up in backtraces. It would be interesting to add support
for inlined functions in backtraces so that inlining of non-leaf functions does not
break behaviour.

Issue 2:
by consalus:

On darwin amd64 at b7b92d1bdcf4+ tip:

"test.bash" in misc/cgo/stdio fails with the following output:

CGOPKGPATH= cgo -- align.go file.go test.go test1.go
6g -o _go_.6 align.cgo1.go file.cgo1.go test.cgo1.go test1.cgo1.go _cgo_gotypes.go
6c -FVw -I"/Users/username/code/go/src/pkg/runtime" _cgo_defun.c
echo 'int main() { return 0; }' >_cgo_main.c
gcc -m64 -g -fPIC -O2 -o _cgo_main.o -c _cgo_main.c
gcc -m64 -g -fPIC -O2 -o align.cgo2.o -c align.cgo2.c
gcc -m64 -g -fPIC -O2 -o file.cgo2.o -c file.cgo2.c
gcc -m64 -g -fPIC -O2 -o test.cgo2.o -c test.cgo2.c
gcc -m64 -g -fPIC -O2 -o test1.cgo2.o -c test1.cgo2.c
gcc -m64 -g -fPIC -O2 -o _cgo1_.o _cgo_main.o align.cgo2.o file.cgo2.o test.cgo2.o
test1.cgo2.o
cgo -dynimport _cgo1_.o >__cgo_import.c && mv -f __cgo_import.c _cgo_import.c
6c -FVw _cgo_import.c
rm -f _obj/stdio.a
gopack grc _obj/stdio.a _go_.6 _cgo_defun.6 _cgo_import.6 align.cgo2.o file.cgo2.o
test.cgo2.o test1.cgo2.o
cp _obj/stdio.a "/Users/username/code/go/pkg/darwin_amd64/stdio.a"
6g hello.go
6l -o hello hello.6
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
amd64.S
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
amd64.S
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
/Users/username/code/go/pkg/darwin_amd64/runtime/cgo.a(amd64.o): duplicate definition of
too many errors
make: *** [hello] Error 1

This has been happening for about a week (I sync regularly to see if it is fixed). I
assumed it was something wrong on my machine, since it would otherwise be caught on any
similar machine running "all.bash", but no amount of make clean|nuke has had
an effect. Same issue was independently reported on go-nuts.