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Auto merge of #22767 - pnkfelix:issue-22265, r=nikomatsakis

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Avoid `cat_expr Erred` notes when already in error state.

Also, to ensure we do not let the dropck get skipped, ICE if `cat_expr` errors when *not* in error state.

This is not known to be a breaking change (i.e. I do not know of a current case that causes the new ICE to be exercised).

Fix #22265
This commit is contained in:
bors 2015-02-25 23:08:53 +00:00
commit 610d1695d1
1 changed files with 12 additions and 4 deletions
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16
src/librustc_typeck/check/regionck.rs
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@ -554,8 +554,12 @@ fn visit_expr(rcx: &mut Rcx, expr: &ast::Expr) {
expr.span); expr.span);
} }
Err(..) => { Err(..) => {
rcx.fcx.tcx().sess.span_note(expr.span, let tcx = rcx.fcx.tcx();
"cat_expr_unadjusted Errd during dtor check"); if tcx.sess.has_errors() {
// cannot run dropck; okay b/c in error state anyway.
} else {
tcx.sess.span_bug(expr.span, "cat_expr_unadjusted Errd");
}
} }
} }
} }
@ -571,8 +575,12 @@ fn visit_expr(rcx: &mut Rcx, expr: &ast::Expr) {
check_safety_of_rvalue_destructor_if_necessary(rcx, head_cmt, expr.span); check_safety_of_rvalue_destructor_if_necessary(rcx, head_cmt, expr.span);
} }
Err(..) => { Err(..) => {
rcx.fcx.tcx().sess.span_note(expr.span, let tcx = rcx.fcx.tcx();
"cat_expr Errd during dtor check"); if tcx.sess.has_errors() {
// cannot run dropck; okay b/c in error state anyway.
} else {
tcx.sess.span_bug(expr.span, "cat_expr Errd");
}
} }
} }