Bug#1020869: geg: Generates different graphs from equivalent formulas

[Sven Geuer]

Source: geg
Version: 2.0.9-3
Severity: important
Tags: upstream

Dear Maintainer,

  1/sqrt(1-x^2/100) and
  1/sqrt(1-(x^2)/100)

generate the same wrong graph, while

  1/sqrt(1-0.01x^2)
  1/sqrt(1-(1/100)x^2)
  sqrt(1-x^2/100)^(-1)

each return the expected one.

The error disappears for the non-reciprocal formulas

  sqrt(1-x^2/100)
  sqrt(1-(x^2)/100)
  sqrt(1-0.01x^2)
  sqrt(1-(1/100)x^2)

all of which generate the same expected graph.


-- System Information:
Debian Release: bookworm/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.19.0-1-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled