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gc: never crash during a debugging print
TBR=lvd CC=golang-dev https://golang.org/cl/5686063
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@ -1346,15 +1346,11 @@ nodefmt(Fmt *f, Node *n)
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Type *t;
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t = n->type;
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if(n->orig == N) {
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n->orig = n;
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fatal("node with no orig %N", n);
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}
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// we almost always want the original, except in export mode for literals
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// this saves the importer some work, and avoids us having to redo some
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// special casing for package unsafe
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if(fmtmode != FExp || n->op != OLITERAL)
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if((fmtmode != FExp || n->op != OLITERAL) && n->orig != N)
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n = n->orig;
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if(f->flags&FmtLong && t != T) {
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