1 files changed, 30 insertions, 33 deletions

diff --git a/src/cmd/gc/subr.c b/src/cmd/gc/subr.c
index bea90b87b..72a9ac20c 100644
--- a/src/cmd/gc/subr.c
+++ b/src/cmd/gc/subr.c
@@ -88,6 +88,7 @@ flusherrors(void)
 {
 	int i;
 
+	Bflush(&bstdout);
 	if(nerr == 0)
 		return;
 	qsort(err, nerr, sizeof err[0], errcmp);
@@ -258,9 +259,6 @@ fatal(char *fmt, ...)
 void
 linehist(char *file, int32 off, int relative)
 {
-	Hist *h;
-	char *cp;
-
 	if(debug['i']) {
 		if(file != nil) {
 			if(off < 0)
@@ -274,25 +272,10 @@ linehist(char *file, int32 off, int relative)
 			print("end of import");
 		print(" at line %L\n", lexlineno);
 	}
-
-	if(off < 0 && file[0] != '/' && !relative) {
-		cp = mal(strlen(file) + strlen(pathname) + 2);
-		sprint(cp, "%s/%s", pathname, file);
-		file = cp;
-	}
-
-	h = mal(sizeof(Hist));
-	h->name = file;
-	h->line = lexlineno;
-	h->offset = off;
-	h->link = H;
-	if(ehist == H) {
-		hist = h;
-		ehist = h;
-		return;
-	}
-	ehist->link = h;
-	ehist = h;
+	
+	if(off < 0 && file[0] != '/' && !relative)
+		file = smprint("%s/%s", ctxt->pathname, file);
+	linklinehist(ctxt, lexlineno, file, off);
 }
 
 int32
@@ -607,8 +590,6 @@ algtype1(Type *t, Type **bad)
 				*bad = t;
 			return ANOEQ;
 		}
-		if(t->bound == 0)
-			return AMEM;
 		a = algtype1(t->type, bad);
 		if(a == ANOEQ || a == AMEM) {
 			if(a == ANOEQ && bad)
@@ -1242,8 +1223,10 @@ assignop(Type *src, Type *dst, char **why)
 	
 	// 2. src and dst have identical underlying types
 	// and either src or dst is not a named type or
-	// both are interface types.
-	if(eqtype(src->orig, dst->orig) && (src->sym == S || dst->sym == S || src->etype == TINTER))
+	// both are empty interface types.
+	// For assignable but different non-empty interface types,
+	// we want to recompute the itab.
+	if(eqtype(src->orig, dst->orig) && (src->sym == S || dst->sym == S || isnilinter(src)))
 		return OCONVNOP;
 
 	// 3. dst is an interface type and src implements dst.
@@ -1251,13 +1234,16 @@ assignop(Type *src, Type *dst, char **why)
 		if(implements(src, dst, &missing, &have, &ptr))
 			return OCONVIFACE;
 
-		// we'll have complained about this method anyway, supress spurious messages.
+		// we'll have complained about this method anyway, suppress spurious messages.
 		if(have && have->sym == missing->sym && (have->type->broke || missing->type->broke))
 			return OCONVIFACE;
 
 		if(why != nil) {
 			if(isptrto(src, TINTER))
 				*why = smprint(":\n\t%T is pointer to interface, not interface", src);
+			else if(have && have->sym == missing->sym && have->nointerface)
+				*why = smprint(":\n\t%T does not implement %T (%S method is marked 'nointerface')",
+					src, dst, missing->sym);
 			else if(have && have->sym == missing->sym)
 				*why = smprint(":\n\t%T does not implement %T (wrong type for %S method)\n"
 					"\t\thave %S%hhT\n\t\twant %S%hhT", src, dst, missing->sym,
@@ -1692,7 +1678,7 @@ typehash(Type *t)
 	md5reset(&d);
 	md5write(&d, (uchar*)p, strlen(p));
 	free(p);
-	return md5sum(&d);
+	return md5sum(&d, nil);
 }
 
 Type*
@@ -2115,7 +2101,7 @@ cheapexpr(Node *n, NodeList **init)
 Node*
 localexpr(Node *n, Type *t, NodeList **init)
 {
-	if(n->op == ONAME && !n->addrtaken &&
+	if(n->op == ONAME && (!n->addrtaken || strncmp(n->sym->name, "autotmp_", 8) == 0) &&
 		(n->class == PAUTO || n->class == PPARAM || n->class == PPARAMOUT) &&
 		convertop(n->type, t, nil) == OCONVNOP)
 		return n;
@@ -2257,6 +2243,7 @@ adddot(Node *n)
 	int c, d;
 
 	typecheck(&n->left, Etype|Erv);
+	n->diag |= n->left->diag;
 	t = n->left->type;
 	if(t == T)
 		goto ret;
@@ -2506,12 +2493,19 @@ genwrapper(Type *rcvr, Type *method, Sym *newnam, int iface)
 	Type *tpad, *methodrcvr;
 	int isddd;
 	Val v;
+	static int linehistdone = 0;
 
 	if(0 && debug['r'])
 		print("genwrapper rcvrtype=%T method=%T newnam=%S\n",
 			rcvr, method, newnam);
 
-	lineno = 1;	// less confusing than end of input
+	lexlineno++;
+	lineno = lexlineno;
+	if (linehistdone == 0) {
+		// All the wrappers can share the same linehist entry.
+		linehist("<autogenerated>", 0, 0);
+		linehistdone = 1;
+	}
 
 	dclcontext = PEXTERN;
 	markdcl();
@@ -2608,8 +2602,10 @@ genwrapper(Type *rcvr, Type *method, Sym *newnam, int iface)
 
 	funcbody(fn);
 	curfn = fn;
-	// wrappers where T is anonymous (struct{ NamedType }) can be duplicated.
-	if(rcvr->etype == TSTRUCT || isptr[rcvr->etype] && rcvr->type->etype == TSTRUCT)
+	// wrappers where T is anonymous (struct or interface) can be duplicated.
+	if(rcvr->etype == TSTRUCT ||
+		rcvr->etype == TINTER ||
+		isptr[rcvr->etype] && rcvr->type->etype == TSTRUCT)
 		fn->dupok = 1;
 	typecheck(&fn, Etop);
 	typechecklist(fn->nbody, Etop);
@@ -3631,7 +3627,8 @@ ngotype(Node *n)
  * only in the last segment of the path, and it makes for happier
  * users if we escape that as little as possible.
  *
- * If you edit this, edit ../ld/lib.c:/^pathtoprefix copy too.
+ * If you edit this, edit ../ld/lib.c:/^pathtoprefix too.
+ * If you edit this, edit ../../pkg/debug/goobj/read.go:/importPathToPrefix too.
  */
 static char*
 pathtoprefix(char *s)