shithub: mc

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Don't double init generic impls.

	It's possible for a generic to be serialized twice. If we've
	already added an impl for a type, don't double it.

--- a/parse/use.c

+++ b/parse/use.c

@@ -821,9 +821,10 @@

 		protoname = declname(proto);

 		len = strlen(protoname);

 		p = strstr(dclname, protoname);

-		if (!p || p[len] != '$') {

+		if (!p || p[len] != '$')

 			continue;

-		}

+		if (hthas(proto->decl.impls, ty))

+			continue;

 		htput(proto->decl.impls, ty, dcl);

 		if (ty->type == Tygeneric || hasparams(ty)) {

 			lappend(&proto->decl.gimpl, &proto->decl.ngimpl, dcl);