- added bug093.go

R=r
DELTA=80  (78 added, 2 deleted, 0 changed)
OCL=15094
CL=15101

test/bugs/bug093.go

+// $G $D/$F.go && $L $F.$A && ./$A.out || echo BUG: fails incorrectly
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+type S struct {
+}
+
+func (p *S) M() {
+	print("M\n");
+}
+
+type I interface {
+	M();
+}
+
+func main() {
+	var p *S = nil;
+	var i I = p;  // this should be possible even though p is nil: we still know the type
+	i.M();  // should be possible since we know the type, and don't ever use the receiver
+}
+
+
+/*
+throw: ifaces2i: nil pointer
+SIGSEGV: segmentation violation
+Faulting address: 0x0
+pc: 0x1b7d
+
+0x1b7d?zi
+	throw(30409, 0, 0, ...)
+	throw(0x76c9, 0x0, 0x0, ...)
+0x207f?zi
+	sys·ifaces2i(31440, 0, 31480, ...)
+	sys·ifaces2i(0x7ad0, 0x7af8, 0x0, ...)
+0x136f?zi
+	main·main(1, 0, 1606416424, ...)
+	main·main(0x1, 0x7fff5fbff828, 0x0, ...)
+
+rax     0x1
+rbx     0x1
+rcx     0x33b5
+rdx     0x0
+rdi     0x1
+rsi     0x7684
+rbp     0x7684
+rsp     0xafb8
+r8      0x0
+r9      0x0
+r10     0x1002
+r11     0x206
+r12     0x0
+r13     0x0
+r14     0x7c48
+r15     0xa000
+rip     0x1b7d
+rflags  0x10202
+cs      0x27
+fs      0x10
+gs      0x48
+*/

test/golden.out

@@ -78,7 +78,6 @@ BUG: compilation should succeed
 bugs/bug074.go:6: syntax error
 bugs/bug074.go:7: x: undefined
 BUG: compiler crashes - Bus error
-Bus error               $G $D/$F.go
 
 =========== bugs/bug075.go
 bugs/bug075.go:11: bad shape across assignment - cr=1 cl=2
@@ -103,7 +102,6 @@ BUG: succeeds incorrectly
 =========== bugs/bug085.go
 bugs/bug085.go:8: P: undefined
 BUG: fails incorrectly
-Bus error               $G $D/$F.go
 
 =========== bugs/bug086.go
 4882
@@ -125,6 +123,24 @@ BUG: fails incorrectly
 =========== bugs/bug090.go
 BUG: compilation succeeds incorrectly
 
+=========== bugs/bug093.go
+throw: ifaces2i: nil pointer
+SIGSEGV: segmentation violation
+Faulting address: 0x0
+pc: 0x1b7d
+
+0x1b7d?zi
+	throw(30409, 0, 0, ...)
+	throw(0x76c9, 0x0, 0x0, ...)
+0x207f?zi
+	sys·ifaces2i(31440, 0, 31480, ...)
+	sys·ifaces2i(0x7ad0, 0x7af8, 0x0, ...)
+0x136f?zi
+	main·main(1, 0, 1606416392, ...)
+	main·main(0x1, 0x7fff5fbff808, 0x0, ...)
+
+BUG: fails incorrectly
+
 =========== fixedbugs/bug015.go
 fixedbugs/bug015.go:7: overflow converting constant to <int64>INT64