cure error when extremes cannot be found (#1011)

scikit-hep · Jul 29, 2024 · 1bf5af2 · 1bf5af2
1 parent 4965147
commit 1bf5af2
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/iminuit/minuit.py b/src/iminuit/minuit.py
@@ -2218,8 +2218,9 @@ def draw_mnmatrix(
                         extremes.append(x[k - 1])
                     if yk > fmax and y[k - 1] < fmax:
                         extremes.append(xk)
-                a = min(*extremes, a)
-                b = max(*extremes, b)
+                if extremes:
+                    a = min(*extremes, a)
+                    b = max(*extremes, b)
                 prange[par1] = (a, b)
                 plt.ylim(0, fmax + 0.5)
                 for j in range(i):