try to avoid races again (cf. 8c37cb84065f and fd3a36e48b09);
use_thys
["Gcd/Greatest_Common_Divisor",
"Liseq/Longest_Increasing_Subsequence",
"RIPEMD-160/F",
"RIPEMD-160/Hash",
"RIPEMD-160/K_L",
"RIPEMD-160/K_R",
"RIPEMD-160/R_L",
"RIPEMD-160/Round",
"RIPEMD-160/R_R",
"RIPEMD-160/S_L",
"RIPEMD-160/S_R",
"Sqrt/Sqrt"];