Hi,

during my clean-up of taskwarrior package I removed section which
removes broken symlinks. Even though this bug is considered as fixed, I
believe I reproduced it after 347f54e.

...
task-2.4.3/src/ViewText.cpp
task-2.4.3/src/ViewText.h
task-2.4.3/src/wcwidth6.cpp
phase `unpack' succeeded after 0 seconds
starting phase `patch-usr-bin-file'
phase `patch-usr-bin-file' succeeded after 0 seconds
starting phase `patch-source-shebangs'
Backtrace:
In ice-9/boot-9.scm:
 157: 15 [catch #t #<catch-closure 2357aa0> ...]
In unknown file:
   ?: 14 [apply-smob/1 #<catch-closure 2357aa0>]
In ice-9/boot-9.scm:
  63: 13 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 12 [eval # #]
In ice-9/boot-9.scm:
2401: 11 [save-module-excursion #<procedure 2374880 at ice-9/boot-9.scm:4045:3 ()>]
4050: 10 [#<procedure 2374880 at ice-9/boot-9.scm:4045:3 ()>]
1724: 9 [%start-stack load-stack ...]
1729: 8 [#<procedure 2389c60 ()>]
In unknown file:
   ?: 7 [primitive-load "/gnu/store/06l4f3al56cg49rfiy79risam0f8yb4y-taskwarrior-2.4.3-guile-builder"]
In ice-9/eval.scm:
 387: 6 [eval # ()]
In srfi/srfi-1.scm:
 830: 5 [every1 #<procedure 2590d00 at /gnu/store/j8w9vf3diyvkccsa21p9fqpwsl3wlsy3-module-import/guix/build/gnu-build-system.scm:580:9 (expr)> ...]
In /gnu/store/j8w9vf3diyvkccsa21p9fqpwsl3wlsy3-module-import/guix/build/gnu-build-system.scm:
 584: 4 [#<procedure 2590d00 at /gnu/store/j8w9vf3diyvkccsa21p9fqpwsl3wlsy3-module-import/guix/build/gnu-build-system.scm:580:9 (expr)> #]
 167: 3 [patch-source-shebangs # ...]
In unknown file:
   ?: 2 [remove #<procedure 22cd0e0 at ice-9/boot-9.scm:1460:6 (str)> #]
In ice-9/boot-9.scm:
1461: 1 [#<procedure 22cd0e0 at ice-9/boot-9.scm:1460:6 (str)> "./src/cal"]
In unknown file:
   ?: 0 [stat "./src/cal" #<undefined>]

ERROR: In procedure stat:
ERROR: In procedure stat: No such file or directory: "./src/cal"