diff --git a/src/cmd/gc/go.y b/src/cmd/gc/go.y
index bbffa34bbe9..fd347177f20 100644
--- a/src/cmd/gc/go.y
+++ b/src/cmd/gc/go.y
@@ -215,12 +215,6 @@ xdcl:
 			autoexport($1->nname->sym);
 		$$ = N;
 	}
-|	LPACKAGE { warn("package is gone"); } xfndcl
-	{
-		if($3 != N && $3->nname != N)
-			packagesym($3->nname->sym);
-		$$ = N;
-	}
 |	';'
 	{
 		$$ = N;
@@ -1660,7 +1654,7 @@ exprsym3_list_r:
 
 import_stmt_list_r:
 	import_stmt
-|	import_stmt_list_r osemi import_stmt
+|	import_stmt_list_r ';' import_stmt
 
 hidden_import_list_r:
 |	hidden_import_list_r hidden_import
diff --git a/src/cmd/gc/mparith1.c b/src/cmd/gc/mparith1.c
index c4dbf9f0866..8bf71315208 100644
--- a/src/cmd/gc/mparith1.c
+++ b/src/cmd/gc/mparith1.c
@@ -308,7 +308,7 @@ out:
 	return;
 
 bad:
-	warn("set ovf in mpatof");
+	yyerror("set ovf in mpatof");
 	mpmovecflt(a, 0.0);
 }
 
@@ -396,7 +396,7 @@ out:
 	return;
 
 bad:
-	warn("set ovf in mpatov: %s", as);
+	yyerror("set ovf in mpatov: %s", as);
 	mpmovecfix(a, 0);
 }
 
diff --git a/src/cmd/gc/mparith2.c b/src/cmd/gc/mparith2.c
index 2765ff5c2c4..9be8a16b788 100644
--- a/src/cmd/gc/mparith2.c
+++ b/src/cmd/gc/mparith2.c
@@ -119,7 +119,7 @@ mpcmp(Mpint *a, Mpint *b)
 	int i;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in cmp");
+		yyerror("ovf in cmp");
 		return 0;
 	}
 
@@ -194,7 +194,7 @@ mpaddfixfix(Mpint *a, Mpint *b)
 	long x, *a1, *b1;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mpaddxx");
+		yyerror("ovf in mpaddxx");
 		a->ovf = 1;
 		return;
 	}
@@ -217,7 +217,7 @@ mpaddfixfix(Mpint *a, Mpint *b)
 	}
 	a->ovf = c;
 	if(a->ovf)
-		warn("set ovf in mpaddxx");
+		yyerror("set ovf in mpaddxx");
 
 	return;
 
@@ -264,7 +264,7 @@ mpmulfixfix(Mpint *a, Mpint *b)
 	Mpint s, q;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mpmulfixfix");
+		yyerror("ovf in mpmulfixfix");
 		a->ovf = 1;
 		return;
 	}
@@ -297,7 +297,7 @@ mpmulfixfix(Mpint *a, Mpint *b)
 	q.neg = a->neg ^ b->neg;
 	mpmovefixfix(a, &q);
 	if(a->ovf)
-		warn("set ovf in mpmulfixfix");
+		yyerror("set ovf in mpmulfixfix");
 }
 
 void
@@ -309,7 +309,7 @@ mpmulfract(Mpint *a, Mpint *b)
 	Mpint s, q;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mpmulflt");
+		yyerror("ovf in mpmulflt");
 		a->ovf = 1;
 		return;
 	}
@@ -336,7 +336,7 @@ mpmulfract(Mpint *a, Mpint *b)
 	q.neg = a->neg ^ b->neg;
 	mpmovefixfix(a, &q);
 	if(a->ovf)
-		warn("set ovf in mpmulflt");
+		yyerror("set ovf in mpmulflt");
 }
 
 void
@@ -346,7 +346,7 @@ mporfixfix(Mpint *a, Mpint *b)
 	long x, *a1, *b1;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mporfixfix");
+		yyerror("ovf in mporfixfix");
 		mpmovecfix(a, 0);
 		a->ovf = 1;
 		return;
@@ -380,7 +380,7 @@ mpandfixfix(Mpint *a, Mpint *b)
 	long x, *a1, *b1;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mpandfixfix");
+		yyerror("ovf in mpandfixfix");
 		mpmovecfix(a, 0);
 		a->ovf = 1;
 		return;
@@ -414,7 +414,7 @@ mpandnotfixfix(Mpint *a, Mpint *b)
 	long x, *a1, *b1;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mpandnotfixfix");
+		yyerror("ovf in mpandnotfixfix");
 		mpmovecfix(a, 0);
 		a->ovf = 1;
 		return;
@@ -448,7 +448,7 @@ mpxorfixfix(Mpint *a, Mpint *b)
 	long x, *a1, *b1;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mporfixfix");
+		yyerror("ovf in mporfixfix");
 		mpmovecfix(a, 0);
 		a->ovf = 1;
 		return;
@@ -481,14 +481,14 @@ mplshfixfix(Mpint *a, Mpint *b)
 	vlong s;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mporfixfix");
+		yyerror("ovf in mporfixfix");
 		mpmovecfix(a, 0);
 		a->ovf = 1;
 		return;
 	}
 	s = mpgetfix(b);
 	if(s < 0 || s >= Mpprec*Mpscale) {
-		warn("stupid shift: %lld", s);
+		yyerror("stupid shift: %lld", s);
 		mpmovecfix(a, 0);
 		return;
 	}
@@ -502,14 +502,14 @@ mprshfixfix(Mpint *a, Mpint *b)
 	vlong s;
 
 	if(a->ovf || b->ovf) {
-		warn("ovf in mprshfixfix");
+		yyerror("ovf in mprshfixfix");
 		mpmovecfix(a, 0);
 		a->ovf = 1;
 		return;
 	}
 	s = mpgetfix(b);
 	if(s < 0 || s >= Mpprec*Mpscale) {
-		warn("stupid shift: %lld", s);
+		yyerror("stupid shift: %lld", s);
 		if(a->neg)
 			mpmovecfix(a, -1);
 		else
@@ -532,7 +532,7 @@ mpgetfix(Mpint *a)
 	vlong v;
 
 	if(a->ovf) {
-		warn("ovf in mpgetfix");
+		yyerror("ovf in mpgetfix");
 		return 0;
 	}
 
@@ -588,7 +588,7 @@ mpdivmodfixfix(Mpint *q, Mpint *r, Mpint *n, Mpint *d)
 	if(i >= Mpprec*Mpscale) {
 		q->ovf = 1;
 		r->ovf = 1;
-		warn("set ovf in mpdivmodfixfix");
+		yyerror("set ovf in mpdivmodfixfix");
 		return;
 	}
 
diff --git a/src/cmd/gc/mparith3.c b/src/cmd/gc/mparith3.c
index 8e3da7a4b3a..f97d0b829d6 100644
--- a/src/cmd/gc/mparith3.c
+++ b/src/cmd/gc/mparith3.c
@@ -134,7 +134,7 @@ mpdivfltflt(Mpflt *a, Mpflt *b)
 		a->exp = 0;
 		a->val.neg = 0;
 		a->val.ovf = 1;
-		warn("mpdivfltflt divide by zero");
+		yyerror("mpdivfltflt divide by zero");
 		return;
 	}
 	if(sa == 0) {
@@ -165,14 +165,14 @@ mpgetflt(Mpflt *a)
 	double f;
 
 	if(a->val.ovf)
-		warn("mpgetflt ovf");
+		yyerror("mpgetflt ovf");
 
 	s = sigfig(a);
 	if(s == 0)
 		return 0;
 
 	if(s != Mpnorm) {
-		warn("mpgetflt norm");
+		yyerror("mpgetflt norm");
 		mpnorm(a);
 	}
 
diff --git a/test/bugs/bug108.go b/test/fixedbugs/bug108.go
similarity index 80%
rename from test/bugs/bug108.go
rename to test/fixedbugs/bug108.go
index b7350e72cb2..5c7649f0819 100644
--- a/test/bugs/bug108.go
+++ b/test/fixedbugs/bug108.go
@@ -6,5 +6,5 @@
 
 package main
 func f() {
-	v := 1 << 1025;		// ERROR "overflow"
+	v := 1 << 1025;		// ERROR "overflow|stupid shift"
 }
diff --git a/test/bugs/bug125.go b/test/fixedbugs/bug125.go
similarity index 89%
rename from test/bugs/bug125.go
rename to test/fixedbugs/bug125.go
index c8c5f7dfa39..5670ce028b7 100644
--- a/test/bugs/bug125.go
+++ b/test/fixedbugs/bug125.go
@@ -8,7 +8,7 @@ package main
 
 import (
 	OS "os"  // should require semicolon here; this is no different from other decls
-	IO "io"  // ERROR "missing"
+	IO "io"  // ERROR "missing|syntax"
 )
 
 func main() {
diff --git a/test/golden.out b/test/golden.out
index c91bb450f31..31ca675c13d 100644
--- a/test/golden.out
+++ b/test/golden.out
@@ -106,10 +106,6 @@ abcxyz-abcxyz-abcxyz-abcxyz-abcxyz-abcxyz-abcxyz
 =========== chan/nonblock.go
 PASS
 
-=========== bugs/bug108.go
-bugs/bug108.go:4: stupid shift: 1025
-BUG: errchk: command succeeded unexpectedly:  6g bugs/bug108.go
-
 =========== bugs/bug115.go
 bugs/bug115.go:8: constant -1 overflows uint
 BUG: bug115 should compile
@@ -120,9 +116,6 @@ bugs/bug117.go:9: illegal types for operand: RETURN
 	int
 BUG: should compile
 
-=========== bugs/bug125.go
-BUG: errchk: command succeeded unexpectedly:  6g bugs/bug125.go
-
 =========== bugs/bug131.go
 bugs/bug131.go:7: cannot convert uint64 constant to int64
 bugs/bug131.go:7: illegal types for operand: AS