vips_foreign_save_png_build crash error #103

Hello， when concurrent to call vips_foreign_save_png_build( by restful interface,http) , it would be crash.

some logs are:
Stack: [0x00007f1fa8af9000,0x00007f1fa8bfa000], sp=0x00007f1fa8bf7170, free space=1016k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libvips.so7057099580503627381+0x12aac5] vips_foreign_save_png_build+0x45

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j com.criteo.vips.VipsImage.writePNGToArrayNative(IZIZ)[B+0
j com.criteo.vips.VipsImage.writePNGToArray(IZIZ)[B+6