I happened to run the mizu testlist on Derecho with ctsm5.4.021 and v3.0.1 of mizuRoute and the following tests failed at runtime:
ERI_PS.f19_f19_rHDMAlk_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
ERS_PS.f19_f19_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
ERS_PS.f19_f19_rHDMAlk_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
ERS_PS.nldas2_nldas2_rHDMA_mnldas2.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
ERS_PS.nldas2_nldas2_rUSGS_mnldas2.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
PET_Mmpi-serial_P1x25.5x5_amazon_r05.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
PET_P256x8.nldas2_nldas2_rHDMA_mnldas2.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
PFS.f19_f19_rHDMA_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS.f09_f09_rHDMAlk_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS.f09_f09_rMERIT_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS.f19_f19_rMERIT_mg17.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS_D.5x5_amazon_r05.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS_D_Mmpi-serial.5x5_amazon_r05.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS_Mmpi-serial_D_P1x25.5x5_amazon_r05.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
SMS_P768x4.nldas2_nldas2_rMERIT_mnldas2.I2000Clm60SpMizGs.derecho_gnu.mizuroute-default ( RUN)
The intel tests all worked (with one exception). So there must be something that gnu is telling us here.