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timing: Fix slack histogram segfault with no paths

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-08-05 16:36:35 +02:00
parent ba97c233fb
commit b3acd8095f
1 changed files with 1 additions and 1 deletions
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2
common/timing.cc
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@ -238,7 +238,7 @@ void timing_analysis(Context *ctx, bool print_histogram, bool print_path)
delay_t default_slack = delay_t(1.0e12 / ctx->target_freq);
log_info("estimated Fmax = %.2f MHz\n", 1e6 / (default_slack - min_slack));
if (print_histogram) {
if (print_histogram && slack_histogram.size() > 0) {
constexpr unsigned num_bins = 20;
unsigned bar_width = 60;
auto min_slack = slack_histogram.begin()->first;