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ng: check can_never_match before validate_fuzzy

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This commit is contained in:
Justin Viiret
2017-03-06 14:15:56 +11:00
committed by Matthew Barr
parent c50a931bb4
commit 5edecbf539
2 changed files with 5 additions and 0 deletions
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4
src/nfagraph/ng.cpp
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@@ -330,6 +330,10 @@ bool NG::addGraph(NGWrapper &w) {
/* ensure utf8 starts at cp boundary */
ensureCodePointStart(rm, w);
if (can_never_match(w)) {
throw CompileError(w.expressionIndex, "Pattern can never match.");
}
// validate graph's suitability for fuzzing before resolving asserts
validate_fuzzy_compile(w, w.edit_distance, w.utf8, cc.grey);