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handle zeroed interface in ifaceI2I

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R=r
OCL=16938
CL=16938
This commit is contained in:
Russ Cox 2008-10-10 16:21:50 -07:00
parent 32d00e6cc6
commit 900e076d21
1 changed files with 9 additions and 8 deletions
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17
src/runtime/iface.c
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@ -231,7 +231,6 @@ sys·ifaceI2T(Sigt *st, Map *im, void *it, void *ret)
void void
sys·ifaceI2I(Sigi *si, Map *im, void *it, Map *retim, void *retit) sys·ifaceI2I(Sigi *si, Map *im, void *it, Map *retim, void *retit)
{ {
if(debug) { if(debug) {
prints("I2I sigi="); prints("I2I sigi=");
printsigi(si); printsigi(si);
@ -241,15 +240,17 @@ sys·ifaceI2I(Sigi *si, Map *im, void *it, Map *retim, void *retit)
} }
if(im == nil) { if(im == nil) {
throw("ifaceI2I: nil map"); // If incoming interface is uninitialized (zeroed)
return; // make the outgoing interface zeroed as well.
retim = nil;
retit = nil;
} else {
retit = it;
retim = im;
if(im->sigi != si)
retim = hashmap(si, im->sigt);
} }
retit = it;
retim = im;
if(im->sigi != si)
retim = hashmap(si, im->sigt);
if(debug) { if(debug) {
prints("I2I ret="); prints("I2I ret=");
printiface(retim, retit); printiface(retim, retit);